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WP-3D Data Info

| Time parameters | Aircraft parameters | Chemical species | Aerosols | Radiation |

File prefixes from data download are listed below. The file contents are specified and the measurement is described briefly. For more details, see the header of the data file.

Time parameters

Time: Almost all of the P-3 data is time-aligned to AOCTimewave, which is 1 second time resolution in integer seconds. It starts at the time the aircraft takes off, and ends at landing. Many of the parameters are on this time base.
Here are the exceptions.
Hg: StartTime_Hg / StopTime_Hg (reported every 150 seconds)
PILSIC: StartTime_PILS / StopTime_PILS (reported every 4 minutes)
PILSWSOC: StartTime_WSOC / StopTime_WSOC (reported every 6 minutes)
VOCsWAS: TimeOpen_WAS / TimeHalf_WAS / TimeClose_WAS (variable intervals)

Aircraft parameters

AircraftPos

Aircraft Position parameters measured with various aircraft sensors.
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
GpsLat: GPS Latitude (deg)
GpsLon: GPS Longitude (deg)
GpsAlt: GPS Altitude (m)
PAlt: Pressure Altitude (m) Derived from the pressure and uses the standard atmosphere to calculate an altitude
RAlt: Radar Altitude (m) Aircraft altitude above ground

AircraftMet

Aircraft Meteorological parameters measured with various aircraft sensors.
Time: 1 Hz data aligned to AOCTimewave
AmbTemp: Ambient Temperature (C)
DewPtTemp: Dew Point Temperature (C) measured by chilled mirror hygrometer.
EquivPotTemp: Equivalent Potential Temperature (K)
H2Omr: H2O mixing ratio (g/kg)
H2Ovp: H2O vapor pressure (mbar)
TDLH2O: H2O meausured by Tunable Diode Laser (mbar)
PotTemp: Potential Temperature (K)
RelHumidity: Relative Humidity (%)
StaticPrs: Static Pressure (mb)
VertWindSpd: Vertical Wind Speed (m/s)
WindDir: Wind Direction (deg)
WindSpd: Wind Speed (m/s)

AircraftMis

Aircraft Miscellaneous parameters measured with various aircraft sensors.
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
DryDensity: Dry Density (kg m-3)
DownPRT: Sea Surface Temperature (C)
GndSpd: Ground Speed (m/s)
Heading: Heading (deg)
Pitch: Pitch Angle (deg)
Roll: Roll Angle (deg)
Track: Track Angle (deg)
TrueAirSpd: True Air Speed (m/s)

Chemical Species

CO

Carbon Monoxide using VUV Resonance Fluorescence.
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
CO_ppbv: CO in ppbv

CO2

Carbon Dioxide measured using NDIR technique.
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
CO2_ppmv: CO2 in ppmv

GITCIMS

Hydroxyl Radical (OH), Sulfuric Acid (H2SO4), Methane Sulfonic Acid (MSA) measurered using Chemical Ionization Mass Spectrometer (CIMS)
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
MSA_molec_cc: Methane Sulfonic Acid (molecules / cm^3)
OH_molec_cc: OH (molecules / cm^3)
Sulfuric_molec_cc: Sulfuric Acid (molecules / cm^3)

Hg

Mercury measured by Thermal desorption, cold vapor atomic fluorescence spectrophotometry (CVAFS) TEKRAN 2537A.
Time: Data reported every 150 seconds using StartTime_Hg, StopTime_Hg
Reported parameter names and units:
Hg_ng_m3: Mercury in ng/m3

HNO3

HNO3 measured using Chemical Ionization Mass Spectrometer (CIMS).
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
HNO3_ppbv: HNO3 in ppbv

NOy

Nitrogen compounds measured using NO/O3 chemiluminescence.
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
NO_ppbv: NO in ppbv
NO2_ppbv: NO2 in ppbv
NOy_ppbv: NOy in ppbv

O3

Ozone measured using NO/O3 chemiluminescence.
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
O3_ppbv: Ozone in ppbv

PANs

PANs measured using Chemical Ionization Mass Spectrometer (CIMS).
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
MPAN: Peroxy Methacryloyl Nitrate (CH2=C(CH3)C(O)OONO2) in pptv
PAN: Peroxy Acetyl Nitrate (CH3C(O)OONO2) in pptv
PiBN: PiBN in pptv
PPN: Peroxy Propionyl Nitrate (C2H5C(O)OONO2) in pptv

SO2

Sulfur dioxide measured using UV Pulsed Fluorescence.
Time: 1 Hz data aligned to AOCTimewave
Reported parameter names and units:
SO2_ppbv: SO2 in ppbv

VOCsPTRMS

VOCs measured using Proton Transfer Reaction Mass Spectrometer (PTRMS).
Time: Reported about every 15 seconds on AOCTimewave, but actual times vary. Contact PI for details.
Reported parameter names and units:
Acetaldehyde, Acetone, Acetonitrile, Benzene, C3benzenes, DMS, Furan, Isoprene, Methanol, Toluene, Xylene: All in units of pptv

VOCsWAS

VOCs measured using Whole Air Sampling technique.
Time: Aligned to TimeOpen_WAS, TimeHalf_WAS, TimeClose_WAS
Reported parameter names and units:
Too many to list (about 70)

Aerosols

NAerosol

Aerosol Size, Number, Surface, Volume Distribution (NOAA Aerosol).
Time: 1Hz data reported on AOCTimewave
Reported parameter names and units:
nnucl: particle number concentration, 0.005 to less than 0.15 micrometers (#/cm^3)
snucl: particle surface area, 0.005 to less than 0.15 micrometers (um^2/cm^3)
vnucl: particle volume, 0.005 to less than 0.15 micrometers (um^3/cm^3)
npm1: particle number concentration, 0.15 to 1.0 micrometers (#/cm^3)
spm1: particle surface area, 0.15 to 1.0 micrometers (um^2/cm^3)
vpm1: particle volume, 0.15 to 1.0 micrometers (um^3/cm^3)
ncoarse: particle number concentration, greater than 1.0 up to 7.0 micrometers (#/cm^3)
ncoarse_10s: 10 sec. averages of particle number concentration, greater than 1.0 up to 7.0 micrometers (#/cm^3)
scoarse: particle surface area, greater than 1.0 up to 7.0 micrometers (um^2/cm^3)
scoarse_10s: particle surface area, greater than 1.0 up to 7.0 micrometers (um^2/cm^3)
vcoarse: particle volume, greater than 1.0 up to 7.0 micrometers (um^3/cm^3)
vcoarse_10s: particle volume, greater than 1.0 up to 7.0 micrometers (um^3/cm^3)
ntot: particle number concentration, 0.005 to 7.0 micrometers (#/cm^3)
stot: particle surface area, 0.005 to 7.0 micrometers (um^2/cm^3)
vtot: particle volume, 0.005 to 7.0 micrometers (um^3/cm^3)

PILSIC

Aerosol Aerosol Bulk Ionic Composition measured using Particle Into Liquid Sampling (PILS).
Time: Reported on StartTime_PILS, StopTime_PILS
Reported parameter names and units:
Chloride, Nitrite, Nitrate, Sulfate, Sodium, Calcium, Magnesium, Potassium: All reported in units of ug/m3

PILSWSOC

Water Soluble Organic Carbon aerosol data measured using Particle Into Liquid Sampling (PILS)
Time: Reported on StartTime_WSOC, StopTime_WSOC
Reported parameter names and units:
WSOC_ug_m3: Water soluable organic carbon in units of ug/m3

Radiation

jNO2

Actinic Flux NOAA Spectrometer
Time: 1 Hz data reported on AOCTimewave
NO2 Photolysis rate (J-Value).
Reported parameter names and units:
Units in sec^(-1)
Upward-looking, Downward-looking and Combined (sum of Up and Down) J values for NO2

jValCSD

Actinic Flux NOAA Spectrometer
Time: 1 Hz data reported on AOCTimewave
Photolysis rates (J-Values).
Reported parameter names and units:
All units in sec^(-1)
Upward-looking, Downward-looking and Combined (sum of Up and Down) J values for 17 reactions