File Format Specifications [v2.86]

Last Modified 03/18/11
Go to File-Code

  • This document describes the file formats used to store aerosol data at ESRL/GMD. There are three basic types of files: ambient aerosol, ambient meteorology, and sampling system state.
  • All data files are plain ASCII text, in comma-separated, fixed-length fields. The end of a record is denoted by a linefeed character (ASCII hex 10), which optionally may be preceded by a carriage return.
  • Universal Coordinated Time (UTC) is used for all time fields. For averaged data, the time reported is the start of the averaging interval.
  • Basic aerosol data file record format: (stations with minimal instrumentation may truncate the records at the point where no additional data are available). Leading plus signs are replaced with a blank. This is the common format for the basic measurements obtained at a high time resolution. Missing value codes are always positive. For stations where a particular instrument is not present, the corresponding data field may be either empty or contain the missing value code for that parameter.
  • Separate data and header files are used for each type of data. The data fields for ambient data are identical for all stations (although truncated records may be used for stations with limited instrumentation), while different data fields may be used in the sampling system state files from the various stations. There may even be several different types of sampling system state files for some sites.
  • A flags field is used in ambient aerosol data files to indicate sampling conditions and data processing status.
  • Aerosol light scattering and light absorption coefficients are reported relative to a particular temperature and pressure, either ambient or standard temperature (273.15K) and pressure. An STP correction bit in the flags field is used to denote which reference case is used.


Naming Convention

File names consist of content, status, time codes, and station identifiers. The general format is:

<FC><s><timecode>.<STN>

<FC> is a two character (with the exception of "volumes") File Code that indicates the general content.


File-Code

General content

a_

aerosol data (Old CP format)

ad_ & fd_

aerosol and filter digital data (ad_ is Old CP format)

af _& ff_

aerosol filter data (af_ is old CP format)

ageS

Averaged data segments

ag_

aerosol and GPS merged data

al_

averaged data, extracted using xt2

am_

aerosol monitor data

at_

aethelometer data -- old format

b__

UPS data

bm_

UPS monitor records

ca_

One minute averaged CN data

cm_

CN monitor data

da_

One minute averaged CCN data

ds_

The results of running a model to calculate the supersaturation of a given average

fm_

filter monitor records

f"w"

fitted f(RH) info for specific wavelength"w" (e.g., fr, fb or fg)

ft_

Filter sample time records

g__

GPS data

h_

"humidograph" data; A merging of several instruments at a one minute averaging frequency

hge

1 sec edited IAP data with GPS merged in

hgeS

segment averaged IAP data with GPS merged in

hm_

Humidograph set point channel changes

k_

aethalometer data

la_

one minute averaged data for the CLAP or PSAP

laeS

segment averaged lae data file with GPS data merged in

lm_

CLAP monitor records

lw_

3-wavelength PSAP data

m__

general monitor info

me_

ambient meteorological data; not produced by CPD; primarily exist with Older CP formated data

na_

One minute averages of Nephelometer data

nb_

zero-corrected na_ data file

nbN_eS

segment averaged naNe data file with GPS data merged in (see nb_ file type)

nc_

neph calibration results

ne_

neph state errors

nk_

neph span check report

nm_

neph monitor data

ns_

neph state data

nz_

na_ zero data file

oa, oc, oe, om,

wet neph filenames else the same as the na,nc, ...

p__

Present Weather Detector

pm_

LovePID data

si__

processed OPC data

sm_

output from scheduled tasks

sr_

raw OPC data

ss_

seconds and samples per sample period

ud_

umac digital state changes

ua_& um_

umac monitor records

vol & volumes

Weekly cumulative filter volume records

w__

Wind Speed and Wind Direction file

wm_

Watlow monitor data

wx_

Weather Data

a_[AHMD]

Averaged data

la_[AHMD]

Averaged data (la_ file format)

<s> is a one or two character Status Code indicating the processing state of the file

Status-Code

Data form

_

as high-resolution (usually minute) data

b,g,r

blue,green or red wavelength for f(RH) data

e

high resolution, edited data

eS

edited data for time segments.

h, H

as hourly averages

d, D

as daily averages

m, M

as monthly averages

A

"generic" average-formatted file

t

as 2-hour averages

w

as weekly averages

<timecode> is a string indicating time interval of contents

Timecode

Data Time Interval

X

the most recently processed data (usually one day)

cum

"cumulative", variable interval

Head

no time interval - this is a header file

<yr>w<wk>

one week of year <yr> beginning with week <wk>

<yr>Q<q>

one quarter of year <yr> beginning with quarter <q>

<yr>

year <yr>

<yr>d<doy>

one day of year <yr> beginning with DOY <doy>

<yr>m<mn>

one month of year <yr> beginning with month <mn>

YYYY_DDD_X

Data from year YYYY, day of year DDD, sequential label X varies from A-Z to allow multiple files per day.


<STN> is the three character station identifier (source of the data).

Station ID

Station location

air

Aircraft Field Campaigns

alt

Alert, Canada

amf

Arm Mobile Facility

bnd

Bondville, IL

bld

Boulder, CO

brw

Barrow, AK

cpo

Cheeka Peak, WA

cpt

Cape Point, South Africa

csj

Cape San Juan, Puerto Rico

cvi

Counterflow Virtual Impactor

iap

In-situ Aircraft Profiles

kco

Kaashidoo, Maldives

kos

Kosan, Cheju, South Korea

kpo

Kpuszta, Hungary

lab

Lab, Boulder, CO

lar

Laramie, WY

mln

Mauna Loa, HI [New]

mlo

Mauna Loa, HI

nsa

North Slope (Barrow), AK

nwr

Niwot Ridge, CO

p-3

p-3 flight

sfa

Surface Field Campaigns A

sfb

Surface Field Campaigns B

sfc

Surface Field Campaigns

sgp

So. Great Plains

smo

American Samoa

spo

South Pole

thd

Trinidad Head, CA

wlg

Mt. Waliguan, China

wsa

Sable Island, Canada

Field Separator

All files currently have a comma as the field separator.


Field definition

Each File Code, Status Code combination has a specific format, as described below:


File: a__<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info.

1

Station_ID STN

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC DOY

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0011

4-character code representing system status.

%4s

5

CN_control

±9.999e-99

Aerosol number concentration (cm-3) measured with CNC on "control" inlet

%10.3e

6

CN_ambient

±9.999e-99

Aerosol number concentration (cm-3) measured with CNC on "ambient" inlet

%10.3e

7

Bap_G

±9.999e-99

Aerosol light absorption coefficient (m-1), green channel.

%10.3e

8

RefBsp_B

±9.999e-99

Aerosol total light scattering coefficient (m-1), blue channel.

%10.3e

9

RefBsp_G

±9.999e-99

Aerosol total light scattering coefficient (m-1), green channel.

%10.3e

10

RefBsp_R

±9.999e-99

Aerosol total light scattering coefficient (m-1), red channel.

%10.3e

11

RefBbsp_B
-or-
Bsp_NIR

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), near infrared channel.

%10.3e

12

RefBbsp_G

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), green channel.

%10.3e

13

RefBbsp_R

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), red channel.

%10.3e

14

RH_refNeph

±999

Relative Humidity (percent) inside nephelometer

%4d

15

T_refNeph

±999.9

Temperature (K) inside nephelometer

%5.1f

16

P_refNeph

±9999.9

Pressure (hPa) inside nephelometer

%7.1f

17

WS

±99.9

Local wind speed (m s-1)

%5.1f

18

WD

±999

Local wind direction (degrees True)

%4d


File: ad_<timecode>.<STN>, fd_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

Time_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0011

4-character code representing system status.

%4s

5

Analyzers_ON

0

1=analyzers ON, 0 = analyzers OFF

%1d

6

Active_Filter

9

Valid filters are 1-8. If more than one filter is active at any one time, or if no filters are active, this field is set to zero.

%1d

7

Filter_Error

999

0=no filter error

Otherwise, this field contains the decimal value of a byte composed of the status of each filter. Each filter is a bit (1=filter on, 0=filter off), and are organized such that position 0 (LSB) = filter 1, position 1 = filter 2, up to position 7 respectively.

%03d

8

Unused1

0

unused digital input

%1d

9

Unused2

0

unused digital input

%1d

10

Unused3

0

unused digital input

%1d

11

Unused4

0

unused digital input

%1d


File: af_<timecode>.<STN>, ff_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Empty String

Exists due to historical formatting

%s

5

Filter

Exists due to historical formatting

%s

6

Text

Exists due to historical formatting

%s

7

vol0_blank

volume of air/gas through the blank

8

vol1

total volume of air/gas through filter1

9

vol2

total volume of air/gas through filter2

10

vol3

total volume of air/gas through filter3

11

vol4

total volume of air/gas through filter4

12

vol5

total volume of air/gas through filter5

13

vol6

total volume of air/gas through filter6

14

vol7

total volume of air/gas through filter7

15

vol8_bypass

total volume of air/gas through the bypass line


File: ageS<timecode>.<STN> Averaged data segments.
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info.

1-24

same as ag_ file

25

Segment ID

required field

Unique identifier for segment, YYYY_DDD_X_SITE_SEG, where YYYY=year, DDD=day of year, X=sequence label A..Z, SITE=location label, SEG=segment label

%s


File: ag_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info.

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0011

4-character code representing system status.

%4s

5

CN_control

±9.999e-99

Aerosol number concentration (cm-3) measured with CNC on "control" inlet

%010.3e

6

CN_ambient

±9.999e-99

Aerosol number concentration (cm-3) measured with CNC on "ambient" inlet

%010.3e

7

Bap_G

±9.999e-99

Aerosol light absorption coefficient (m-1), green channel.

%010.3e

8

Bsp_B

±9.999e-99

Aerosol total light scattering coefficient (m-1), blue channel.

%010.3e

9

Bsp_G

±9.999e-99

Aerosol total light scattering coefficient (m-1), green channel.

%010.3e

10

Bsp_R

±9.999e-99

Aerosol total light scattering coefficient (m-1), red channel.

%010.3e

11

Bbsp_B
-or-
Bsp_NIR

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), near infrared channel.

%010.3e

12

Bbsp_G

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), green channel.

%010.3e

13

Bbsp_R

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), red channel.

%010.3e

14

Neph_RH

±999

Relative Humidity (percent) inside nephelometer

%04d

15

Neph_T

±999.9

Temperature (K) inside nephelometer

%05.1f

16

Neph_P

±9999.9

Pressure (hPa) inside nephelometer

%07.1f

17

Ambient_T

±99.9

Ambient temperature (K)

%05.1f

18

Ambient_RH

±999

Ambient RH (%)

%04d

19

GPS_time_UTC

099.99999

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

20

Latitude

999.9999

Latitude, positive numbers are North

%08.4f

21

Longitude

9999.9999

Longitude, positive numbers are West

%09.4f

22

Altitude_m

9999.9

Altitude above mean sea level, meters

%06.1f

23

GndSpeed_m_s

999.9

Speed over ground, m/s

%05.1f

24

Course_true

999.9

True course over ground, degrees

%05.1f


File: al_[HMD]X.<STN> average format generated using xt2
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1-58

Same as a_[AHMD]

Same as a_[AHMD]

Same as a_[AHMD]

Same as a_[AHMD]

59

Bap_B (default size)

±9.999e-99

Aerosol light absorption coefficient (m-1), blue channel. (467 nm)

%10.3e

60

Bap_G (default size)

±9.999e-99

Aerosol light absorption coefficient (m-1), green channel. (530 nm)

%10.3e

61

Bap_R (default size)

±9.999e-99

Aerosol light absorption coefficient (m-1), red channel. (660 nm)

%10.3e

62

Bap_B (alternate size)

±9.999e-99

Aerosol light absorption coefficient (m-1), blue channel. (467 nm)

%10.3e

63

Bap_G (alternate size)

±9.999e-99

Aerosol light absorption coefficient (m-1), green channel. (530 nm)

%10.3e

64

Bap_R (alternate size)

±9.999e-99

Aerosol light absorption coefficient (m-1), red channel. (660 nm)

%10.3e

65

SD_Bap_B (default size)

±9.999e-99

Standard deviation of Bap_B data this period

%10.3e

66

SD_Bap_G (default size)

±9.999e-99

Standard deviation of Bap_G data this period

%10.3e

67

SD_Bap_R (default size)

±9.999e-99

Standard deviation of Bap_R data this period

%10.3e

68

SD_Bap_B (alternate size)

±9.999e-99

Standard deviation of Bap_B data this period

%10.3e

69

SD_Bap_G (alternate size)

±9.999e-99

Standard deviation of Bap_G data this period

%10.3e

70

SD_Bap_R (alternate size)

±9.999e-99

Standard deviation of Bap_R data this period

%10.3e

71

N_Bap_B (default size)

±99999

Number of data points used in computation

%6d

72

N_Bap_G (default size)

±99999

Number of data points used in computation

%6d

73

N_Bap_R (default size)

±99999

Number of data points used in computation

%6d

74

N_Bap_B (alternate size)

±99999

Number of data points used in computation

%6d

75

N_Bap_G (alternate size)

±99999

Number of data points used in computation

%6d

76

N_Bap_R (alternate size)

±99999

Number of data points used in computation

%6d

File: am_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Q_filter_lpm

±99.99

Instantaneous air quantity through active filter (lpm)

%06.2f

5

Q_analyzer_lpm

±99.99

Instantaneous air quantity through analyzer (lpm)

%06.2f

6

Q_3_lpm

±99.99

Instantaneous air quantity through spare line

%06.2f

7

Q_4_lpm

±99.99

Instantaneous air quantity through spare line

%06.2f

8

Q_bypass_lpm

±99.99

Instantaneous air quantity through bypass line.

%06.2f

9

Q_CNdrier_lpm

±99.99

Instantaneous air quantity through CN drier line.

%06.2f

10

Q_CN_lpm

±99.99

Instantaneous air quantity through CN.

%06.2f

11

T_sample_degC

±99.9

Temperature of current air sample. (deg C)

%05.1f

12

T_stack_degC

±99.9

Temperature of air through stack. (deg C)

%05.1f

13

T_pumpbox_degC

±99.9

Temperature inside pumpbox. (deg C)

%05.1f

14

T_heater_deg C

±99.9

Temperature of heating tape. (deg C)

%05.1f

15

T_uMAC_degC

±99.9

Temperature measured at mMAC panel. (deg C)

%05.1f

16

dP_Pitot_hPa

±9.999

DPressure across stack. (hPa)

%06.3f

17

dP_Purge_hPa

±999.9

DPressure across purge line. (hPa)

%06.1f

18

dP_F1_hPa

±999.9

DPressure across filter 1. (hPa)

%06.1f

19

dP_F2_hPa

±999.9

DPressure across filter 2. (hPa)

%06.1f

20

dP_F3_hPa

±999.9

DPressure across filter 3. (hPa)

%06.1f

21

dP_F4_hPa

±999.9

DPressure across filter 4. (hPa)

%06.1f

22

dP_F5_hPa

±999.9

DPressure across filter 5. (hPa)

%06.1f

23

dP_F6_hPa

±999.9

DPressure across filter 6. (hPa)

%06.1f

24

dP_F7_hPa

±999.9

DPressure across filter 7. (hPa)

%06.1f

25

dP_F8_hPa

±999.9

DPressure across filter 8. (hPa)

%06.1f

26

V_uMAC_V

±9.999

Line voltage supplying power to mMAC. (volts)

%06.3f

27

RH_sample

±999.9

Relative humidity of sample

%06.1f

28

dP_neph_im_hPa

±999.9

DPressure across neph impactor valve (hPa)

%06.1f

29

dP_spare1

±999.9

DPressure spare1 (hPa)

%06.1f

30

dP_spare2

±999.9

DPressure spare2 (hPa)

%06.1f

31

T_rack

±99.9

Temperature inside the rack. (deg C)

%05.1f

32

P_station

±09999.9

station pressure (hPa)

%07.1f

File: at_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

date

5

time

6..12

concentration

999999

BC concentration (ng/m3) [7 wavelength channels]

%07d

13

flow

±9.99

aethalometer flow rate

%05.2f

14

sz_1

99.9999

sample zero [7 wavelength channels]

%07d

15

sb_1

99.9999

sample zero [7 wavelength channels]

%07d

16

rz_1

99.9999

reference zero [7 wavelength channels]

%07d

17

rb_1

99.9999

reference beam [7 wavelength channels]

%07d

18

fraction_1

9.99

fraction of dilution

%05.3f

19

attenuation_1

20..55

sz_2

repeat columns 14-19 for other 6 wavelength channels

File: b__<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

AC_Volts_In

±999

AC Voltage supplying UPS

%04d

5

AC_Volts_Out

±999

AC Voltage UPS is supplying as output

%04d

6

AC_Amps_Out

±999.9

AC Amps UPS is currently supplying

%06.1f

7

Batt_DC_amp

±999.9

DC Amps of UPS Battery

%06.1f

8

Batt_DC_V

±999.9

DC Voltage of UPS Battery

%06.1f

9

Frequency

±999.9

Frequency of line supplying UPS power (Hz)

%06.1f

10

UPS_Temp

±999

Temperature inside UPS (deg C)

%04d


File: bm_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

B_Monitor Last_UPS_ Report

(string of variable length)

String containing an event report generated by the UPS program. This string may contain embedded spaces.

%s

File: ca_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

5

Ncnc

File: cm_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

CNC_chan1_sec

5

CNC_chan1_min

6

Status

7

T_condenser

8

T_saturator

9

Q_ccs


File: da_<timecode>.<STN>
Return to File-Code

Col #

Name

Formatand Missing Value Code(mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

ss_set

99.999

Sample supersaturation (percent), setpoint value reported by instrument

%06.3f

5

Temp_Unstable_flag

0

Hexadecimal flag, non-zero values indicate that instrument was not operating stably. Bit 0 (0x00) is set by instrument, based on the temperature difference between the setpoint temperature and the actual temperature. Bit 1 (0x02) is set by cpd, based on the standard deviation of the column temperature difference exceeding a threshold.

%01X

6

T_TEC1

999.99

Temperature (deg C) at top of column

%06.2f

7

T_TEC2

999.99

Temperature (deg C) at middle of column

%06.2f

8

T_TEC3

999.99

Temperature (deg C) bottom of column

%06.2f

9

T_sample

999.99

Temperature (deg C) of sample air entering the column

%06.2f

10

T_inlet

999.99

Temperature of sample air at entrance to instrument

%06.2f

11

T_OPC

999.99

Temperature of the optical particle counter

%06.2f

12

T_nafion

999.99

Temperature of the nafion humidifier

%06.2f

13

dT_TEC3_TEC1_StdDev

99.99

Standard deviation of the temperature difference (deg C) between the top and bottom of the column

%05.2f

14

Q_sample

999.99

Volumetric flowrate (ccm) of sample air

%06.2f

15

Q_sheath

999.99

Volumetric flowrate (ccm) of sheath air

%06.2f

16

P_sample

9999.99

Sample pressure (hPa)

%07.2f

17

Laser_Current

9999.99

OPC laser current (mA)

%07.2f

18

N_ccn

99999.99

Number concentration of CCN (cm-3)

%08.2f

19

Bin_Number_N_ccn

99

Bin number of lowest channel of OPC included in summation of N_ccn

%02d

20..40

dN_1 - dN 21

99999.9

number concentration in each OPC size bin

%07.1f


File: ds_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Q_Total_m3s

9.999e-99

Q_sample + Q_sheath (from da_)

%9.3e

5

Q_sh_aer_m3s

999.99

Q_sheath/Q_sample (from da_)

%06.2f

6

Press_pa

9.999e-99

P_sample (from da_)

%9.3e

7

T_inlet_K

999.99

T_inlet (from da_)

%06.2f

8

T_cold_K

999.99

T_TEC1 (from da_)

%06.2f

9

T_Hot_K

999.99

T_TEC3 (from da_)

%06.2f

10

N_ccn

99999.99

N_ccn (from da_)

%08.2f

11

dT_TEC3_TEC1 _stdDev

99.99

from da_

%05.2f

12

SS_calc

999.99

sample supersaturation (percent), from model calculation

%06.3f

File: fd_<timecode>.<STN>
Return to File-Code see ad_

File: ff_<timecode>.<STN>
Return to File-Code see af_


File: fm_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Q_filter_lpm

±99.99

Instantaneous air quantity through active filter (lpm)

%06.2f

5

T_sample_degC

±99.9

Temperature of current air sample. (deg C)

%05.1f

6

RH_sample

±999.9

Relative humidity of sample

%06.1f

7

dP_Pump_hPa

±999.9

DPressure across filter pump. (hPa)

%06.1f

8

dP_F1_hPa

±999.9

DPressure across filter 1. (hPa)

%06.1f

9

dP_F2_hPa

±999.9

DPressure across filter 2. (hPa)

%06.1f

10

dP_F3_hPa

±999.9

DPressure across filter 3. (hPa)

%06.1f

11

dP_F4_hPa

±999.9

DPressure across filter 4. (hPa)

%06.1f

12

dP_F5_hPa

±999.9

DPressure across filter 5. (hPa)

%06.1f

13

dP_F6_hPa

±999.9

DPressure across filter 6. (hPa)

%06.1f

14

dP_F7_hPa

±999.9

DPressure across filter 7. (hPa)

%06.1f

15

dP_F8_hPa

±999.9

DPressure across filter 8. (hPa)

%06.1f

16

dP_spare1

±999.9

DPressure spare1 (hPa)

%06.1f

17

dP_spare2

±999.9

DPressure spare2 (hPa)

%06.1f

18

dP_spare3

±999.9

DPressure spare3 (hPa)

%06.1f

19

T_rack_degC

±99.9

Temperature inside the rack. (deg C)

%05.1f

20

T_uMAC_degC

±99.9

Temperature measured at uMAC panel in filter rack. (deg C)

%05.1f

21

V_uMAC_V

±9.999

Line voltage supplying power to uMAC in filter rack. (volts)

%06.3f

22

CurrSampleID

±9

Number of current filter sample (1-8)

%1d


File: f "w" fb(or fg or fr)<HX>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

flags

0010

4-character code representing system status

%4s

5

f(RH) for 3 parameter fit

99.999

fitted value of f(RH) for 85/40 (3p fit)

%6.3f

6

chi^2 3 param fit

9.999e-99

goodness of fit parameter

%10.3e

7

min bsp

9.999e-99

minimum light scattering coefficient for file wavelength (m-1), reported at STP

%10.3e

8

min dry RH

999.9

minimum dry relative humidity (%) used in curve fit

%5.1

9

max dry RH

999.9

maximum dry relative humidity (%) used in curve fit

%5.1

10

min wet RH

999.9

minimum wet relative humidity (%) used in curve fit

%5.1

11

max wet RH

999.9

maximum wet relative humidity (%) used in curve fit

%5.1

12

p1

9.999e-99

3 param curvefit parameter #1

%10.3e

13

p2

9.999e-99

3 param curvefit parameter #2

%10.3e

14

p3

9.999e-99

3 param curvefit parameter #3

%10.3e

15

f(RH) for 2 parameter fit

99.999

fitted value of f(RH) for 85/40 (2p fit)

%6.3f

16

chi^2 2 param fit

9.999e-99

goodness of fit parameter

%10.3e

17

p1

9.999e-99

2 param curvefit parameter #1

%10.3e

18

p2

9.999e-99

2 param curvefit parameter #2

%10.3e

19

f(RH)

99.999

fitted value of f(RH) for 85/40 for bbsp

%6.3f

20

chi^2 2 param fitfo bbsp

9.999e-99

goodness of fit parameter

%10.3e

21

p1

9.999e-99

2 param curvefit parameter #1 for bbsp

%10.3e

22

p2

9.999e-99

2 param curvefit parameter #2 for bbsp

%10.3e



File: ft_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

EndYear

1993

End Year of sample period

%4d

3

EndTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

Endtime of sample period

%09.5f

4

StartYear

1993

Start Year of sample period

%4d

5

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY

StartTime of sample period

%09.5f

6

Cum_sec

999999

Seconds elapsed during sampling period.

%6d

7

Filter

9

Filter that is being sampled this period

%1d

File: g__<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info.

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

GPS_time_UTC

099.99999

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

5

Latitude

999.9999

Latitude, positive numbers are North

%08.4f

6

Longitude

9999.9999

Longitude, positive numbers are West

%09.4f

7

Altitude_m

9999.9

Altitude above mean sea level, meters

%06.1f

8

GndSpeed_m_s

999.9

Speed over ground, m/s

%05.1f

9

Course_true

999.9

True course over ground, degrees

%05.1f


File: h__<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

SGP

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0011

4-character code representing system status

%4s

5

CN_control

99999.9

Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "control" inlet.

%07.1f

6

CN_ambient

99999.9

Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet.

%07.1f

7

Bap_G

9999.99

Aerosol light absorption coefficient (Mm-1), green (adj. to 550 nm) channel.

%07.2f

8

RefBsp_B

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Blue channel

%07.2f

9

RefBsp_G

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Green channel

%07.2f

10

RefBsp_R

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. red channel

%07.2f

11

RefBbsp_B

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph blue channel

%07.2f

12

RefBbsp_G

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph. green channel

%07.2f

13

RefBbsp_R

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph. red channel

%07.2f

14

WetBsp_B

9999.99

Aerosol total light scattering coefficient (Mm-1), Hum. Neph. Blue channel

%07.2f

15

WetBsp_G

9999.99

Aerosol total light scattering coefficient (Mm-1), Hum. Neph. Green channel

%07.2f

16

WetBsp_R

9999.99

Aerosol total light scattering coefficient (Mm-1), Hum. Neph. red channel

%07.2f

17

WetBbsp_B

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph blue channel

%07.2f

18

WetBbsp_G

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph. green channel

%07.2f

19

WetBbsp_R

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph. red channel

%07.2f

20

RH_Inlet

999.9

Relative humidity (percent) at inlet

%05.1f

21

T_Inlet

999.9

Temperature (deg C) at inlet.

%05.1f

22

RH_refInlet

999.9

Relative humidity (percent) at ref. nephelometer inlet

%05.1f

23

T_refInlet

999.9

Temperature (deg C) at ref. nephelometer inlet.

%05.1f

24

RH_refNeph

999.9

Relative humidity (percent) inside ref. nephelometer.

%05.1f

25

T_refNeph

999.9

Temperature (deg C) inside ref. nephelometer.

%05.1f

26

RH_S1

999.9

Relative humidity (percent) of humido. preheater.

%05.1f

27

T_S1

999.9

Temperature (deg C) of humido. preheater.

%05.1f

28

RH_S2

999.9

Relative humidity (percent) of humido. controller.

%05.1f

29

T_S2

999.9

Temperature (deg C) of humido. controller.

%05.1f

30

RH_wetInlet

999.9

Relative humidity (percent) at wet nephelometer inlet.

%05.1f

31

T_wetInlet

999.9

Temperature (deg C) at wet nephelometer inlet.

%05.1f

32

RH_wetNeph

999.9

Relative humidity (percent) inside of wet nephelometer.

%05.1f

33

T_wetNeph

999.9

Temperature (deg C) inside of wet nephelometer.

%05.1f

34

RH_Ambient

999.9

Relative humidity (percent) in ambient air

%05.1f

35

T_Ambient

999.9

Temperature (deg C) in ambient air

%05.1f

36

P_ambient

9999.9

Ambient pressure (hPa)

%06.1f

37

P_refNeph

9999.9

Pressure inside reference nephelometer (hPa)

%06.1f

38

P_wetNeph

9999.9

Pressure inside wet nephelometer (hPa)

%06.1f

39

W_S

99.9

Wind speed (m/s)

%04.1f

40

W_D

999

Wind direction (deg true)

%03d

41

Bap_B_3W

9999.99

Aerosol light absorption coefficient (Mm-1), blue (PSAP=467 nm) channel.

%07.2f

42

Bap_G_3W

9999.99

Aerosol light absorption coefficient (Mm-1), green (PSAP=530 nm) channel.

%07.2f

43

Bap_R_3W

9999.99

Aerosol light absorption coefficient (Mm-1), red (PSAP=660 nm) channel.

%07.2f


File: hge<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

IAP

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0011

4-character code representing system status

%4s

5

CN_control

99999.9

Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "control" inlet.

%07.1f

6

CN_ambient

99999.9

Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet.

%07.1f

7

Bap_G

9999.99

Aerosol light absorption coefficient (Mm-1), green (adj to 550 nm) channel.

%07.2f

8

RefBsp_B

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Blue channel

%07.2f

9

RefBsp_G

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Green channel

%07.2f

10

RefBsp_R

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. red channel

%07.2f

11

RefBbsp_B

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph blue channel

%07.2f

12

RefBbsp_G

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph. green channel

%07.2f

13

RefBbsp_R

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph. red channel

%07.2f

14

WetBsp_B

9999.99

Aerosol total light scattering coefficient (Mm-1), Hum. Neph. Blue channel

%07.2f

15

WetBsp_G

9999.99

Aerosol total light scattering coefficient (Mm-1), Hum. Neph. Green channel

%07.2f

16

WetBsp_R

9999.99

Aerosol total light scattering coefficient (Mm-1), Hum. Neph. red channel

%07.2f

17

WetBbsp_B

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph blue channel

%07.2f

18

WetBbsp_G

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph. green channel

%07.2f

19

WetBbsp_R

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph. red channel

%07.2f

20

RH_Inlet

999.9

Relative humidity (percent) at inlet

%05.1f

21

T_Inlet

999.9

Temperature (deg C) at inlet.

%05.1f

22

RH_refInlet

999.9

Relative humidity (percent) at ref. nephelometer inlet

%05.1f

23

T_refInlet

999.9

Temperature (deg C) at ref. nephelometer inlet.

%05.1f

24

RH_refNeph

999.9

Relative humidity (percent) inside ref. nephelometer.

%05.1f

25

T_refNeph

999.9

Temperature (deg C) inside ref. nephelometer.

%05.1f

26

RH_S1

999.9

Relative humidity (percent) of humido. preheater.

%05.1f

27

T_S1

999.9

Temperature (deg C) of humido. preheater.

%05.1f

28

RH_S2

999.9

Relative humidity (percent) of humido. controller.

%05.1f

29

T_S2

999.9

Temperature (deg C) of humido. controller.

%05.1f

30

RH_wetInlet

999.9

Relative humidity (percent) at wet nephelometer inlet.

%05.1f

31

T_wetInlet

999.9

Temperature (deg C) at wet nephelometer inlet.

%05.1f

32

RH_wetNeph

999.9

Relative humidity (percent) inside of wet nephelometer.

%05.1f

33

T_wetNeph

999.9

Temperature (deg C) inside of wet nephelometer.

%05.1f

34

RH_Ambient

999.9

Relative humidity (percent) in ambient air

%05.1f

35

T_Ambient

999.9

Temperature (deg C) in ambient air

%05.1f

36

P_ambient

9999.9

Ambient pressure (hPa)

%06.1f

37

P_refNeph

9999.9

Pressure inside reference nephelometer (hPa)

%06.1f

38

P_wetNeph

9999.9

Pressure inside wet nephelometer (hPa)

%06.1f

39

W_S

99.9

Wind speed (m/s)

%04.1f

40

W_D

999

Wind direction (deg true)

%03d

41

GPS_time_UTC

999.99999

GPS time.

%09.5f

42

Latitude, positive numbers are North

999.9999

Latitude

%08.4f

43

Longitude

9999.9999

Longitude, positive numbers are West

%09.4f

44

Altitude_m

9999.9

Altitude (m asl)

%06.1f

45

Gnd_Speed_m_s

999.9

Speed over ground (m/s)

%05.1f

46

Course_true

999.9

True course over ground (degrees)

%05.1f


File: hgeS<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1-46

Same as hge

same as hge

Same as hge

same as hge

47

Flight_Seg_Id

required field

Unique identifier for segment, YYYY_DDD_X_SITE_SEG, where YYYY=year, DDD=day of year, X=sequence label A..Z, SITE=location label, SEG=segment label (100s feet)

%s


File: hm_<timecode>.<STN>
Return to File-Code

Setpoint channel values. Written on a setpoint change (may be scheduled or the result of operator intervention). The humidigraph system is essentially a heater and a water pump. So a setpoint channel will change when the heater goes to the next temperature, or the water pump is primed (for example). The steps are configured in the ini file that a certain number of seconds per hour the temperature are set to a particular value.

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Chan_A

5

Chan_B

7

Chan_C

8

Chan_D

File: k__<timecode>.<STN>; raw aethalometer data
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

flow_slpm

±9.99

aethalometer flow rate

%05.2f

5

fraction

9.99

fraction of dilution

%05.3f

6..12

concentration

999999

BC concentration (ng/m3) [7 wavelength channels]

%07d

13..19

atn

999.999

attenuation [7 wavelength channels]

%07d

20..26

sz

99.9999

sample zero [7 wavelength channels]

%07d

27..33

sb

99.9999

sample beam [7 wavelength channels]

%07d

34..40

rz

99.9999

reference zero [7 wavelength channels]

%07d

41..47

rb

99.9999

reference beam [7 wavelength channels]

%07d


File: la_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0010

4-character code representing system status

%4s

5

BapB

9999.99

Aerosol light absorption coefficient (Mm-1), blue (PSAP=467 nm; CLAP=467 nm) channel.

%07.2f

6

BapG

9999.99

Aerosol light absorption coefficient (Mm-1), green (PSAP=530 nm; CLAP=528 nm) channel.

%07.2f

7

BapR

9999.99

Aerosol light absorption coefficient (Mm-1), red (PSAP=660 nm; CLAP=652 nm) channel.

%07.2f

8

TrB

9.999

%05.3f

9

TrG

9.999

%05.3f

10

TrR

9.999

%05.3f

*Note lae files are generated when edits and corrections are applied to la_ files.

File: nbN_eS<timecode>.<STN>
Return to File-Code


Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1-10

Same as lae

same as lae

Same as lae

same as lae

11

Flight_Seg_Id

required field

Unique identifier for segment, YYYY_DDD_X_SITE_SEG, where YYYY=year, DDD=day of year, X=sequence label A..Z, SITE=location label, SEG=segment label (1000s feet)

%s



File: lm_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Q_clap_slpm

±9.99

CLAP flow rate

%05.2f

5

TrG

9.999

Transmittance -- green

%05.3f

6

I_sampleG

9999999

Sample Intensity-- green

%07d

7

I_refG

9999999

Reference Intensity-- green

%07d

8

I_sam_rsd_ppmG

-- green

%07d

9

I_ref_rsd_ppmG

-- green

%07d

If the lm_ file comes from a CLAP or 1WPSAP the lm_ files end with column 9.
If the lm_ files comes from a 3WPSAP the following 10 columns are included.

10

TrB

9.999

Transmittance -- blue

%05.3f

11

I_sampleB

9999999

Sample Intensity -- blue

%07d

12

I_refb

9999999

Reference Intensity -- blue

%07d

13

I_sam_rsd_ppmB

-- blue

%07d

14

I_ref_rsd_ppmB

-- blue

%07d

15

TrR

9.999

Transmittance -- red

%05.3f

16

I_sampleR

9999999

Sample Intensity -- red

%07d

17

I_refR

9999999

Reference Intensity -- red

%07d

18

I_sam_rsd_ppmR

-- red

%07d

19

I_ref_rsd_ppmR

-- red

%07d


File: lw_<timecode>.<STN>
Return to File-Code Note:high frequency data files may only have first 19 fields.

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0011

4-character code representing system status

%4s

5

Bap_B

9999.99

Aerosol light absorption coefficient (Mm-1), blue channel.

%07.2f

6

Bap_G

9999.99

Aerosol light absorption coefficient (Mm-1), green channel.

%07.2f

7

Bap_R

9999.99

Aerosol light absorption coefficient (Mm-1), red channel.

%07.2f

8

RefBsp_B

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Blue channel

%07.2f

9

RefBsp_G

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Green channel

%07.2f

10

RefBsp_R

9999.99

Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Red channel

%07.2f

11

RH_refNeph

999.9

Relative humidity (percent) inside ref. nephelometer.

%05.1f

12

T_refNeph

999.9

Temperature (deg C) inside ref. nephelometer.

%05.1f

13

P_refNeph

9999.9

Pressure inside reference nephelometer (hPa)

%6.1f

14

TrB

9.999

Transmittance blue

%05.3f

15

TrG

9.999

Transmittance green

%05.3f

16

TrR

9.999

Transmittance red

%05.3f

17

Q_clap_slpm

±9.999

CLAP flow rate

%05.3f

18

RH_psap

999.9

Relative humidity (percent) inside PSAP

%05.1f

19

T_psap

999.9

Temperature (deg C) inside PSAP

%05.1f

20

I_sampleB

9999999

Sample Intensity blue

%07d

21

I_sampleG

9999999

Sample Intensity green

%07d

22

I_sampleR

9999999

Sample Intensity red

%07d

23

I_refB

9999999

Reference Intensity blue

%07d

24

I_refG

9999999

Reference Intensity green

%07d

25

I_refR

9999999

Reference Intensity red

%07d

26

I_ref_rsdB

9999999

Ref. Int. rsd blue

%07d

27

I_ref_rsdG

9999999

Ref. Int. rsd green

%07d

28

I_ref_rsdR

9999999

Ref. Int. rsd red

%07d

29

I_sam_rsdB

9999999

Samp. Int. rsd blue

%07d

30

I_sam_rsdG

9999999

Samp. Int. rsd green

%07d

31

I_sam_rsdR

9999999

Samp. Int. rsd red

%07d


File: m__<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

M_Monitor

(string of variable length)

General system monitor notes and records. This string may contain embedded spaces and/or commas.

%s



File: me_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code.

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

T_ambient

±99.9

local temperature (deg C)

%5.1f

5

RH_ambient

±999.9

local relative humidity (%)

%6.1f

6

P_ambient

±9999.9

local pressure (hPa)

%7.1f

7

WS

±99.9

local wind speed (m s-1)

%5.1f

8

WD

±999

local wind direction (degrees True)

%4d

9

Visibility

±999.9

local visibility (km)

%6.1f

10

Weather

99

2-digit code for current weather, "TI"

value Type Intensity

0 none --
1 unknown very light
2 drizzle light
3 rain moderate
4 snow heavy
5 hail very heavy
6 freezing unknown
7 freezing drizzle
8 freezing rain

%2d

11

Cloud_base_m

9999

height of lowest layer of cloud, in meters above ground level

%4d

12

Opacity_layer1

99

opacity of lowest layer of cloud, in 10th's

%2d

13

Opacity_total

99

opacity of total cloud cover, in 10th's

%2d

14

Fog1

999

frequency of fog with LWC>0.05 g/m3 (%)

%3d

15

Fog2

999

frequency of fog with LWC>0.15 g/m3 (%)

%3d

16

Solar_flux

9999

broadband solar irradiance, W/m2

%4d


File: na_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0010

4-character code representing system status

%4s

5

BspB

9999.99

Aerosol total light scattering coefficient (Mm-1), Neph. Blue channel

%07.2f

6

BspG

9999.99

Aerosol total light scattering coefficient (Mm-1), Neph. Green channel

%07.2f

7

BspR

9999.99

Aerosol total light scattering coefficient (Mm-1), Neph. red channel

%07.2f

8

BbspB

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Neph blue channel

%07.2f

9

BbspG

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Neph. green channel

%07.2f

10

BbspR

9999.99

Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Neph. red channel

%07.2f

11

T_inlet

999.9

Temperature (deg C) at ref. nephelometer inlet.

%05.1f

12

RH_neph

999.9

Relative humidity (percent) at ref. nephelometer inlet

%05.1f

13

T_neph

999.9

Temperature (deg C) inside ref. nephelometer.

%05.1f

14

P_neph

999.9

Pressure inside ref. nephelometer. (hPa)

%05.1f


File: nb_<timecode>.<STN>
Return to File-Code

The nb_ file format is identical to the na_ format. It stores data that has undergone zero-correction (generated by cnvtnb_).

nbN_e files are nb_ files with edits and standard correctiions applied to them

nbN_eS files are nbN_e files with segment averages appended to them

File: nc_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

EndTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1) of the end of the calibration.

%09.5f

4

Bsp_B_bkg

±9.999e-99

Background blue (m-1)

%10.3e

5

Bsp_G_bkg

±9.999e-99

Background green (m-1)

%10.3e

6

Bsp_R_bkg

±9.999e-99

Background red (m-1)

%10.3e

7

Bbsp_B_bkg

±9.999e-99

Backscatter Background blue (m-1)

%10.3e

8

Bbsp_G_bkg

±9.999e-99

Backscatter Background green (m-1)

%10.3e

9

Bbsp_R_bkg

±9.999e-99

Backscatter Background red (m-1)

%10.3e


File: ne_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Mode

9999

Code representing nephelometer system state

%4s

5

Flags

not applicable

nephelometer status (4 digits on TSI nephelometers)

%4s



File: nk_<timecode>.<STN>
Return to File-Code

The nk_ file consists of a series of data reports resulting from a nephelometer span check. The span check is our in-field method for checking nephelometer calibration. Each of the 6 types of reports is described below along with tabular representation of the report contents.

File: nz_<timecode>.<STN>
Return to File-Code

The nz_ file format is identical to the na_ format. It stores zero data fields generated by cnvtnz_.

1 - SC_den{GAS}
These reports are named: SC_denAIR and SC_denCO2. These give the average T/P/RH during the AIR and CO2 measurement periods, as well as the average density ratio and lamp power. The density ratio is the air density in the sample volume divided by the air density at STP (273.15 K, 1013.25 hPA).

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

report title

n/a

SC_den{GAS}

%9s

5

Press_hPa

9999.99

neph pressure (hPa)

%07.2f

6

Temp_K

999.99

neph temperature (K)

%06.2f

7

RH

999.9

neph relative humidity

%05.1f

8

Den

99.99999

Gas density ratio

%08.5f

9

Power

999.9

Neph lamp power (W)

%05.1f

2 - SC_Hz{chopper phase}
These reports are named: SC_HzCAL, SC_HzDark, SC_HzAIR, and SC_HzCO2. These give the average photon count frequencies of during the different phases of the chopper rotation: Calibrator, Dark, Sample_AIR, and Sample_CO2.

Col #

Name

Format and mvc

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

report title

n/a

SC_Hz{chopper phase}

%9s

5

{Phase}_TS_B

99.999e-99

total scatter blue for {chopper phase}

%010.3e

6

{Phase}_TS_G

99.999e-99

total scatter green for {chopper phase}

%010.3e

7

{Phase}_TS_R

99.999e-99

total scatter red for {chopper phase}

%010.3e

8

{Phase}_BS_B

99.999e-99

backscatter blue for {chopper phase}

%010.3e

9

{Phase}_BS_G

99.999e-99

backscatter green for {chopper phase}

%010.3e

10

{Phase}_BS_R

99.999e-99

backscatter red for {chopper phase}

%010.3e

3 - SC_sAirHz
This gives the sensitivity of the instrument to filtered air at STP. It is the the increase in the photon count frequency when the instrument is filled with air at STP, compared to the hypothetical value when the instrument is evacuated.

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

report title

n/a

SC_sAirHz

%9s

5

sAir_TS_B

99.999e-99

Sensitivity of total scatter blue

%010.3e

6

sAir_TS_G

99.999e-99

Sensitivity of total scatter green

%010.3e

7

sAir_TS_R

99.999e-99

Sensitivity of total scatter red

%010.3e

8

sAir_BS_B

99.999e-99

Sensitivity of back scatter blue

%010.3e

9

sAir_BS_G

99.999e-99

Sensitivity of back scatter green

%010.3e

10

sAir_BS_R

99.999e-99

Sensitivity of back scatter red

%010.3e


4 - SC_Bsp{GAS}
These are the measured average scattering coefficients (Rayleigh-subtracted) reported by the neph during the AIR and CO2 measurement periods. They are at the T/P/RH reported in the denAIR and denCO2 records.

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

report title

n/a

SC_Bsp{GAS}

%8s

5

Bsp{GAS}_B

99.999e-99

Sensitivity of total scatter blue

%010.3e

6

Bsp{GAS}_G

99.999e-99

Sensitivity of total scatter green

%010.3e

7

Bsp{GAS}_R

99.999e-99

Sensitivity of total scatter red

%010.3e

8

Bbsp{GAS}_B

99.999e-99

Sensitivity of back scatter blue

%010.3e

9

Bbsp{GAS}_G

99.999e-99

Sensitivity of back scatter green

%010.3e

10

Bbsp{GAS}_R

99.999e-99

Sensitivity of back scatter red

%010.3e



5 - SC_BsgCO2
This is the measured Rayleigh scattering coefficient of CO2, adjusted to STP.

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

report title

n/a

SC_BsgCO2

%9s

5

BsgCO2_B

99.999e-99

Measured Rayleigh total scatter blue

%010.3e

6

BsgCO2_G

99.999e-99

Measured Rayleigh total scatter green

%010.3e

7

BsgCO2_R

99.999e-99

Measured Rayleigh total scatter red

%010.3e

8

BbsgCO2_B

99.999e-99

Measured Rayleigh back scatter blue

%010.3e

9

BbsgCO2_G

99.999e-99

Measured Rayleigh back scatter green

%010.3e

10

BbsgCO2_R

99.999e-99

Measured Rayleigh back scatter red

%010.3e


6 - SC_PctErr
This is the percentage error between the measured Rayleigh scattering coefficient of CO2 and the literature values.

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

report title

n/a

SC_PctErr

%9s

5

Err_TS_B

99.999e-99

Percent error total scatter blue

%010.3e

6

Err_TS_G

99.999e-99

Percent error total scatter green

%010.3e

7

Err_TS_R

99.999e-99

Percent error total scatter red

%010.3e

8

Err_BS_B

99.999e-99

Percent error back scatter blue

%010.3e

9

Err_BS_G

99.999e-99

Percent error back scatter green

%010.3e

10

Err_BS_R

99.999e-99

Percent error back scatter red

%010.3e


File: nm_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Press_hPa

±9999.9

Pressure inside nephelometer. (hPa)

%07.1f

5

Temp_K

±999.9

Temperature inside nephelometer (K)

%06.1f

6

Ref_green

±9.999e-99

Nephelometer Green Reference (Hz)

%010.3e

7

Lamp_neph_V

±9.999e-99

Voltage supplying nephelometer lamp (V)

%010.3e

8

Lamp_I_A

±9.9

Current supplying nephelometer lamp (A)

%04.1f

9

Neph_RH

±999.9

Relative Humidity (%) inside neph

%06.1f

10

T_inlet

±999.9

Temperature of inlet air (K)

%06.1f

11

Aux_BNC_in

9999

BNC Auxiliary input (mV)

%04d

...before format v2.0, these fields are:

8

Bkg_blue_1_m

±9.999e-99

Background blue (m-1)

%010.3e

9

Bkg_green_1_m

±9.99e9-99

Background green (m-1)

%010.3e

10

Bkg_red_1_m

±9.99e9-99

Background red (m-1)

%010.3e

File: ns_<timecode>.<STN>
Return to File-Code
[same format as ne_<timecode>.<STN>]

File: oc_<timecode>.<STN>
Return to File-Code
[same format as nc_<timecode>.<STN>, but for second nephelometer]

File: om_<timecode>.<STN>
Return to File-Code
[same format as nm_<timecode>.<STN>, but for second nephelometer]

File: os_<timecode>.<STN>
Return to File-Code
[same format as ns_<timecode>.<STN>, but for second nephelometer]

File: p__<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Vis_alarm

Visibility Alarm

5

HW_Alarm

Hardware Alarm

6

Vis_1min

visibility 10 minute average max 20000m

7

Vis_10min

visibility 1 minute average max 20000m

8

NWS_Code

Instant present weather

%3s

9

PWC_Instant

Instant present weather code, 0 ... 99

10

PWC_15min

15 min present weather code, 0 ... 99

11

PWC_Hour

hour present weather code, 0 ... 99

12

Water_Intensity

Water Intensity 1 min average mm/h

13

Cum_Water

Cumulative water sum, 0 ... 99.99 mm

14

Cum_Snow

Cumulative snow sum, 0 ... 999 mm

File: pm_<timecode>.<STN>
Return to File-Code

Written at the monitor interval (usually 15 minutes). Contains instantaneous values for a given control (the address of which is the first field). Written once for each control on the chain.

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Addr

5

PV

6

SP1

7

SP2

8

Status


File: si_<timecode>.<STN>
more info...
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

flags

0010

4-character code representing system status

%4s

5

Wavelength

±550

wavelength for calculated and measured scattering (nm)

%4.1f

6

RefIndR_sub

±1.50

real part of refractive index for sub-um

%5.3f

7

RefIndR_tot

±1.50

real part of refractive index for sub-10um

%5.3f

8

RefIndI_sub

±0.005

imag. part of refractive index for sub-um

%5.3f

9

RefIndI_tot

±0.005

imag. part of refractive index for sub-10um

%5.3f

10

RefBsp_G

±9999.99

measured scattering at 550 nm (Mm-1)

%7.2f

11

nt1

±99999.9

calculated number concentration for sub-um (cm-3)

%7.1f

12

nt10

±99999.9

calculated number concentration for sub-10um (cm-3)

%7.1f

13

dg1

±99.999

calculated geometric mean diameter for sub-um (um)

%6.3f

14

dg10

±99.999

calculated geometric mean diameter for sub-10um (um)

%6.3f

15

vt1

±99999.9

calculated volume for sub-um (cm-3)

%7.1f

16

vt10

±99999.9

calculated volume for sub-10um (cm-3)

%7.1f

17

dgV1

±99.999

calculated volume diameter for sub-um (um)

%6.3f

18

dgV10

±99.999

calculated volume diameter for sub-10um (um)

%6.3f

19

bsp1

±9999.99

calculated scattering for sub-um (Mm-1)

%7.2f

20

bsp10

±9999.99

calculated scattering for sub-10um (Mm-1)

%7.2f

21

bap1

±9999.99

calculated absorption for sub-um (Mm-1)

%7.2f

22

bap10

±9999.99

calculated absorption for sub-10um (Mm-1)

%7.2f

23

angRB

±99.99

Angstrom exponent for red-blue neph data

%5.2f


File: sm_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Event_Type

(string)

event from scheduled tasks

%s

File: sr_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

flags

0010

4-character code representing system status

%4s

5

ZeroAir

±99.9

Zero air flow (lpm)

%5.1f

6

SampInt

±999.9

Sample interval (s)

%5.1f

7

Activity

±99.99

Activity (%)

%5.2f

8

Ref_V

±9.99

Laser reference voltage (V)

%5.2f

9

SampFlow

±9.999

Sample flow (lpm)

%6.3f

10

SheathFlow

±9.999

Sheath air flow (lpm)

%6.3f

11-42

N(i)

±99999.9

Number of particles in bin(i)

%7.1f

File: ss_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

seconds

±999

Elapsed seconds this sampling period

%04d

5

samples

±999

Number of samples taken this sampling period

%04d

File: ua_<timecode>.<STN> and um_ <timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Temp_C

35.05

temperature of umac

%05.2f

5

PS_volts

05.05

power supply voltage

%05.2f

6

AIN00

-000.496

analog input to umac

%08.3f

7

AIN01

-000.496

analog input to umac

%08.3f

8

AIN02

-000.496

analog input to umac

%08.3f

9

AIN03

-000.496

analog input to umac

%08.3f

10

AIN04

-000.496

analog input to umac

%08.3f

11

AIN05

-000.496

analog input to umac

%08.3f

12

AIN06

-000.496

analog input to umac

%08.3f

13

AIN07

-000.496

analog input to umac

%08.3f

14

AIN08

-000.496

analog input to umac

%08.3f

15

AIN09

-000.496

analog input to umac

%08.3f

16

AIN10

-000.496

analog input to umac

%08.3f

17

AIN11

-000.496

analog input to umac

%08.3f

18

AIN12

-000.496

analog input to umac

%08.3f

19

AIN13

-000.496

analog input to umac

%08.3f

20

AIN14

-000.496

analog input to umac

%08.3f

21

AIN15

-000.496

analog input to umac

%08.3f

22

AIN16

-000.496

analog input to umac

%08.3f

23

AIN17

-000.496

analog input to umac

%08.3f

24

AIN18

-000.496

analog input to umac

%08.3f

25

AIN19

-000.496

analog input to umac

%08.3f

26

AIN20

-000.496

analog input to umac

%08.3f

27

AIN21

-000.496

analog input to umac

%08.3f

28

AIN22

-000.496

analog input to umac

%08.3f

29

AIN23

-000.496

analog input to umac

%08.3f

File: ud_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

state

0003

digital state of umac

%4s

File: vol<timecode>.<STN> File: vol<timecode>.<STN> see volumes<timecode>.STN
File: volumes<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Volume_info

(string)

Sampling volume information. (may contain embedded tabs, spaces, and/or commas)

%s


File: w__<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Flags

0010

4-character code representing system status

%4s

5

Wind_Spd

6

Wind_Dir


File: wm_<timecode>.<STN>
Return to File-Code

Written at the monitor interval (usually 15 minutes). Contains the instantaneous values of the two setpoint channels.

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

012.12345

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

Sp_Chan_A

5

Sp_Chan_B


File: wx_<timecode>.<STN>
Return to File-Code

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

XXX

3-character ID code

%3s

2

Year

9999

Year

%4d

3

StartTime_UTC

999.99999

DOY and FRACTIONAL_DOY (January 1 = 1)

%09.5f

4

F_xxx

F_amb

FFFF

FFFFFFFF

Flags field (link to definition of wx_ flag specification)

%4.4X

%8.8X

5

T_xxx

999.9

Temperature (deg C)

%05.1f

6

U_xxx

999.9

Relative Humidity (%)

%05.1f

7

P_xxx

9999.9

Pressure (hPa)

%06.1f

8

WS_xxx

99.9

Wind speed (m/s)

%04.1f

9

WD_xxx

999

Wind direction (deg true)

%03d

10

Wz_xxx

999.99

Visibility (km)

%06.2f

11

Wx_xxx

999

3-digit code for current weather, "TI"

000-099 WMO SYNOP Code Table 4680
100-199 WSA Specific Codes (Last Two digits)
xxx NWS
bCx
bPx
bLx
bRx
bSx
Ipx
ZLx
ZRx
x=intensity code (minus, plus, blank)
b=blank space

%03s

Record Type

xxx Variable Name

Data Source

wx_

amb

Best Available Source Source

wx1_

aer

GMD AERO Group

wx2_

gmd

GMD OBS Group

wx3_

arm

ARM Sensors

wx4_

stn

Station-Specific Sensors


File: a_[AHMD]<timecode>.<STN>[average format]
Return to File-Code

Averages reported in fields 5 through 22 are by default the geometric average, and a corresponding geometric standard deviation. If the corresponding "N" in field 44 through 58 is negative, the average and standard deviation for that measurement is arithmetic, not geometric. Also, arithmetic averaging is used to calculate the hourly average and 2-hourly average files.

The reported geometric standard deviation is a dimensionless number, calculated as the standard deviation of the natural logarithm of the input data. If the input data are log-normally distributed with geometric average "avg" and geometric standard deviation "gsd", then 68% of the data will fall within the interval between (avg * exp(gsd)) and (avg / exp(gsd)).

Fields 6-13 refer to the "default" size range, which has either no upper size cut or a 10-um upper size cut (aerodynamic diameter). Fields 15-22 are for the "alternate" size range, which has a 1-um upper size cut (aerodynamic diameter).

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

123.12

Integer part is Day of Year,
1 = January 1. Fractional part is time at the start of the averaging interval, UTC.

%6.2f

4

Flags

0011

4-character code representing system status.

%4s

5

CN_control

±9.999e-99

Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "control" inlet

%10.3e

6

CN_ambient

(default size)

±9.999e-99

Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet

%10.3e

7

Bap_G

(default size)

±9.999e-99

Aerosol light absorption coefficient (m-1), green channel.

%10.3e

8

Bsp_B

(default size)

±9.999e-99

Aerosol total light scattering coefficient (m-1), blue channel.

%10.3e

9

Bsp_G

(default size)

±9.999e-99

Aerosol total light scattering coefficient (m-1), green channel.

%10.3e

10

Bsp_R

(default size)

±9.999e-99

Aerosol total light scattering coefficient (m-1), red channel.

%10.3e

11

Bbsp_B
-or-
Bsp_NIR

(default size)

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), near infrared channel.

%10.3e

12

Bbsp_G

(default size)

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), green channel.

%10.3e

13

Bbsp_R

(default size)

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), red channel.

%10.3e

14

Neph_RH

±999

Relative Humidity (percent) inside nephelometer

%4d

15

CN_ambient,
(alternate size)

±9.999e-99

Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet

%10.3e

16

Bap_G,
(alternate size)

±9.999e-99

Aerosol light absorption coefficient (m-1), green channel.

%10.3e

17

Bsp_B,
(alternate size)

±9.999e-99

Aerosol total light scattering coefficient (m-1), blue channel.

%10.3e

18

Bsp_G,
(alternate size)

±9.999e-99

Aerosol total light scattering coefficient (m-1), green channel.

%10.3e

19

Bsp_R,
(alternate size)

±9.999e-99

Aerosol total light scattering coefficient (m-1), red channel.

%10.3e

20

Bbsp_B
-or-
Bsp_NIR,
(alternate size)

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), near infrared channel.

%10.3e

21

Bbsp_G,
(alternate size)

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), green channel.

%10.3e

22

Bbsp_R,
(alternate size)

±9.999e-99

Aerosol backwards-hemispheric light scattering coefficient (m-1), red channel.

%10.3e

23

SD_CN_control

±9.999e-99

Standard deviation of CN_control data this period

%10.3e

24

SD_CN_ambient

±9.999e-99

Standard deviation of CN_ambient data this period

%10.3e

25

SD_Bap_G

±9.999e-99

Standard deviation of Bap_G data this period

%10.3e

26

SD_Bsp_B

±9.999e-99

Standard deviation of Bsp_B data this period

%10.3e

27

SD_Bsp_G

±9.999e-99

Standard deviation of Bsp_G data this period

%10.3e

28

SD_Bsp_R

±9.999e-99

Standard deviation of Bsp_R data this period

%10.3e

29

SD_Bbsp_B
-or-
SD_Bsp_NIR

±9.999e-99

Standard deviation of Bbsp_B or Bsp_NIR data this period

%10.3e

30

SD_Bbsp_G

±9.999e-99

Standard deviation of Bbsp_G data this period

%10.3e

31

SD_Bbsp_R

±9.999e-99

Standard deviation of Bbsp_R data this period

%10.3e

32

SD_Neph_RH

±999

Standard deviation of Neph_RH data this period

%4d

33

SD_CN_ambient,
(alternate size)

±9.999e-99

Standard deviation of CN_ambient (alternate size) data this period

%10.3e

34

SD_Bap,
(alternate size)

±9.999e-99

Standard deviation of Bap (alternate size) data this period

%10.3e

35

SD_Bsp_B,
(alternate size)

±9.999e-99

Standard deviation of Bsp_B (alternate size) data this period

%10.3e

36

SD_Bsp_G,
(alternate size)

±9.999e-99

Standard deviation of Bsp_G (alternate size) data this period

%10.3e

37

SD_Bsp_R,
(alternate size)

±9.999e-99

Standard deviation of Bsp_R (alternate size) data this period

%10.3e

38

SD_Bbsp_B
-or-
SD_Bsp_NIR,
(alternate size)

±9.999e-99

Standard deviation of Bbsp_B or Bsp_NIR (alternate size) data this period

%10.3e

39

SD_Bbsp_G,
(alternate size)

±9.999e-99

Standard deviation of Bbsp_G (alternate size) data this period

%10.3e

40

SD_Bbsp_R,
(alternate size)

±9.999e-99

Standard deviation of Bbsp_R (alternate size) data this period

%10.3e

41

N_CN_control

±99999

Number of data points used in computation

%6d

42

N_CN_ambient

±99999

Number of data points used in computation

%6d

43

N_Bap_G

±99999

Number of data points used in computation

%6d

44

N_Bsp_B

±99999

Number of data points used in computation

%6d

45

N_Bsp_G

±99999

Number of data points used in computation

%6d

46

N_Bsp_R

±99999

Number of data points used in computation

%6d

47

N_Bbsp_B
-or-
N_Bsp_NIR

±99999

Number of data points used in computation

%6d

48

N_Bbsp_G

±99999

Number of data points used in computation

%6d

49

N_Bbsp_R

±99999

Number of data points used in computation

%6d

50

N_Neph_RH

±99999

Number of data points used in computation

%6d

51

N_CN_ambient,
(alternate size)

±99999

Number of data points used in computation

%6d

52

N_Bap_G,
(alternate size)

±99999

Number of data points used in computation

%6d

53

N_Bsp_B,
(alternate size)

±99999

Number of data points used in computation

%6d

54

N_Bsp_G,
(alternate size)

±99999

Number of data points used in computation

%6d

55

N_Bsp_R,
(alternate size)

±99999

Number of data points used in computation

%6d

56

N_Bbsp_B
-or-
N_Bsp_NIR,
(alternate size)

±99999

Number of data points used in computation

%6d

57

N_Bbsp_G,
(alternate size)

±99999

Number of data points used in computation

%6d

58

N_Bbsp_R,
(alternate size)

±99999

Number of data points used in computation

%6d



File: la_[AHMD]<timecode>.<STN>[average format for la_ file type]
Return to File-Code

Averages reported in fields 5 through 10 are by default the geometric average, and a corresponding geometric standard deviation. If the corresponding "N" in field 17 through 22 is negative, the average and standard deviation for that measurement is arithmetic, not geometric. Also, arithmetic averaging is used to calculate the hourly average and 2-hourly average files.

The reported geometric standard deviation is a dimensionless number, calculated as the standard deviation of the natural logarithm of the input data. If the input data are log-normally distributed with geometric average "avg" and geometric standard deviation "gsd", then 68% of the data will fall within the interval between (avg * exp(gsd)) and (avg / exp(gsd)).

Col #

Name

Format and Missing Value Code (mvc)

Description

Scanf info

1

Station_ID

WSA

3-character ID code

%3s

2

Year

1993

Year

%4d

3

StartTime_UTC

123.12

Integer part is Day of Year,
1 = January 1. Fractional part is time at the start of the averaging interval, UTC.

%6.2f

4

Flags

0011

4-character code representing system status.

%4s

5

Bap_B, (default size)

±9.999e-99

Aerosol total light absorption coefficient (m-1), blue channel.

%10.3e

6

Bap_G, (default size)

±9.999e-99

Aerosol total light absorption coefficient (m-1), green channel.

%10.3e

7

Bap_R, (default size)

±9.999e-99

Aerosol total light absorption coefficient (m-1), red channel.

%10.3e

8

Bap_B, (alternate size)

±9.999e-99

Aerosol total light absorption coefficient (m-1), blue channel.

%10.3e

9

Bap_G, (alternate size)

±9.999e-99

Aerosol total light absorption coefficient (m-1), green channel.

%10.3e

10

Bap_R, (alternate size)

±9.999e-99

Aerosol total light absorption coefficient (m-1), red channel.

%10.3e

11

SD_Bap_B

±9.999e-99

Standard deviation of Bap_B data this period

%10.3e

12

SD_Bap_G

±9.999e-99

Standard deviation of Bap_G data this period

%10.3e

13

SD_Bap_R

±9.999e-99

Standard deviation of Bap_R data this period

%10.3e

14

SD_Bap_B, (alternate size)

±9.999e-99

Standard deviation of Bap_B (alternate size) data this period

%10.3e

15

SD_Bap_G, (alternate size)

±9.999e-99

Standard deviation of Bap_G (alternate size) data this period

%10.3e

16

SD_Bap_R, (alternate size)

±9.999e-99

Standard deviation of Bap_R (alternate size) data this period

%10.3e

17

N_Bap_B

±99999

Number of data points used in computation

%6d

18

N_Bap_G

±99999

Number of data points used in computation

%6d

19

N_Bap_R

±99999

Number of data points used in computation

%6d

20

N_Bap_B, (alternate size)

±99999

Number of data points used in computation

%6d

21

N_Bap_G, (alternate size)

±99999

Number of data points used in computation

%6d

22

N_Bap_R, (alternate size)

±99999

Number of data points used in computation

%6d



FLAGS Field Specification

The flags field is the 4-character hexadecimal representation of a 16-bit integer. It is used in the a_, ad_, and h_ files.

Char. / Bit Pos.

Hex bit mask

Description

Bit set (1)

Bit clear (0)

1

Project specific

1:3

0x8000

Not used yet

1:2

0x4000

Not used yet

1:1

0x2000

Not used yet

1:0

0x1000

Not used yet

2

Corrections applied to data

2:3

0x0800

Dilution Corrections

Corrections Applied

Corrections Not Applied

2:2

0x0400

neph truncation corrections

corrections applied

corrections not applied

2:1

0x0200

PSAP spot size and calibration corrections

corrections applied

corrections not applied

2:0

0x0100

STP corrections

data corrected to STP

data not corrected to STP

3

Sampling conditions

3:3

0x0080

Zero Subtraction Corrections

corrections applied corrections not applied

3:2

0x0040

Not used

3:1

0x0020

PSAP filter loading

transmittance < 0.7 (Bap data less reliable)

transmittance >= 0.7

3:0

0x0010

Analyzer impactor state

Alternate size range

(valve closed)

Default size range

(valve open)

4

Sampling conditions

4:3

0x0008

Wind sector control - best available wind bird

Wind speed or direction indicate local pollution is likely Local pollution absent

4:2

0x0004

Wind sector control- aerosol wind bird

Wind speed or direction indicate local pollution is likely

Local pollution absent

4:1

0x0002

Manual contamination check

Local pollution present

Local pollution absent

4:0

0x0001

Automatic contamination controller

Local pollution present

Local pollution absent

The default size range is defined to be the total from 0-10 micrometers aerodynamic diameter. The alternate size range is from 0-1 micrometers aerodynamic diameter.


wx_ File FLAGS Field Specification

The flags field is the 4-character hexadecimal representation of a 32-bit integer. This specification is exclusively used in the wx_ file. The flags field of the wx_ file is organized into two parts: 0x XXXX 0000 Where the XXXX (bits 16-32) segment is specific to the wx_ file (see specification table below) and the 0000 (bits 1-16) segment is the standard for all file types (see above specification). The two combined into a 32 bit flag gives the complete wx_ file specification.


Char. / Bit Pos.

Use

wx1

wx2

wx3

1-4

Contamination

(see above table for bits 1-16)

5-16

Reserved

(see above table for bits 1-16)

17-18:1

F

0x 0001 XXXX

0x 0002 XXXX

0x 0003 XXXX

19-20:1

T

0x 0004 XXXX

0x 0008 XXXX

0x 000C XXXX

21-22:2

U

0x 0010 XXXX

0x 0020 XXXX

0x 0030 XXXX

23-24:2

P

0x 0040 XXXX

0x 0080 XXXX

0x 00C0 XXXX

25-26:3

Ws

0x 0100 XXXX

0x 0200 XXXX

0x 0300 XXXX

27-28:3

Wd

0x 0400 XXXX

0x 0800 XXXX

0x 0C00 XXXX

29-30:4

Wz

0x 1000 XXXX

0x 2000 XXXX

0x 3000 XXXX

31-32:4

Wx

0x 4000 XXXX

0x 8000 XXXX

0x C000 XXXX