VISITORS: Effective 21 July 2014, Visitor Center Security will no longer accept IDs from some US states for site access. Please see security procedures for details.
 

LaPorte Data Info

| Time parameters | Meteorological parameters | Chemical species |

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 LaPorte data is time-aligned to Start_CST, which is 1 minute time resolution in integer seconds. Here are the exceptions.
VOCsGCFID: StartTime_GCFID_CST / StopTime_GCFID_CST
VOCsGCMS: SampleTime_GCMS_CST

Meteorological parameters

LaPorteMet

Meteorological parameters measured with various instruments.
Time: 1 minute averages aligned to Start_CST
Reported parameter names and units:
AmbPrs: Ambient Pressure (mbar)
AmbTemp: Ambient Temperature (C)
H2Omr: H2O mixing ratio calculated from relative humidity (g/kg)
RelHumidity: Relative Humidity (%)
WindDir: Wind Direction (deg)
WindSpd: Wind Speed (m/s)

Chemical Species

CO

Carbon Monoxide measured by IR gas-filter correlation (TECo Model 48s).
Time: 1 minute averages aligned to Start_CST
Reported parameter names and units:
CO_ppbv: CO in ppbv

O3cl

Ozone measured using chemiluminescence.
Time: 1 minute averages aligned to Start_CST
Reported parameter names and units:
O3cl_ppbv: Ozone in ppbv

O3uv

Ozone measured by UV absorbance (TECo Model 49c).
Time: 1 minute averages aligned to Start_CST
Reported parameter names and units:
O3uv_ppbv: Ozone in ppbv

SO2

Sulfur dioxide measured using UV Pulsed Fluorescence (TECo Model 43s).
Time: 1 minute averages aligned to Start_CST
Reported parameter names and units:
SO2_ppbv: SO2 in ppbv

VOCsGCFID

VOCs measured using Gas Chromatograph Flame Ionization Detector. (GCFID).
Time: Reported using StartTime_GCFID_CST / StopTime_GCFID_CST. 5 minute measurement every half hour.
Reported parameter names and units:
Too many to list

VOCsGCMS

VOCs measured using Gas Chromatograph / Mass Spectrometer (GCMS).
Time: Reported using SampleTime_GCMS_CST. Hourly measurement.
Reported parameter names and units:
Too many to list