README 
UWFILIF_HCHO_R0 

46,1001
 
Keutsch, Frank 

Department of Chemistry, University of Wisconsin - Madison
 
Formaldehyde mixing ratios from chemistry tower 

BEACHON-ROCS 2010
 
1,1
 
2010808,2010808 

30
 
time_MST, (fractional day of year in MST at midpoint of measurement, where Jan. 1, 12:00am = 1) 

10
 
1,1,1,1,1,1,1,1,1,1 

-999,-999,-999,-999,-999,-999,-999,-999,-999,-999 

time_MST, fractional day of year 
date, date in mmddyy 

hours_MST, hour of day in MST
 
minutes_MST, minutes of hour in MST 

seconds_MST, seconds of minute in MST 

start_TOD_MST, time of day in seconds since midnight until beginning of measurement averaging 

mean_TOD_MST, average time of day in seconds since midnight of measurement averaging 

stop_TOD_MST, time of day in seconds since midnight until end of measurement averaging 

Altitude_AGL_m, altitude Above Ground Level in meters 

HCHO_ppbv, Mixing ratio of formaldehyde in ppbv 

HCHO_precision_ppbv, 1 sigma precision of mixing ratio of formaldehyde in ppbv 

3 

Data is presented as 1/30 Hz gradient data. 

Air was sampled at multiple heights on tower, via ~100'-125' 1/2" OD unheated PFA tubing 

2 m measurements sampled outside instrument trailer, height value +/- 0.5 m 

18
 
PI_CONTACT_INFO: Address: UW-Madison Dept of Chemistry, 1101 University Ave, Madison WI 53706; email: keutsch@wisc.edu; 608-262-7904
 
PLATFORM: Chemistry Tower near Rocky Mountain Research Station in Manitou Experimental Forest, CO 

LOCATION: Manitou Experimental Forest, CO; lat: 38.099; lon: -105.101; elev: 2360m amsl. 

ASSOCIATED_DATA: N/A 

INSTRUMENT_INFO: Fiber Laser-Induced Fluorescence of Gas-Phase Formaldehyde 

DATA_INFO: all concentration data are in ppbv. Raw data were recorded at 1Hz.  Most large gaps in data stream correspond to gradient data, presented in other files. Data were filtered for known errors, points removed by this filtering are considered "missing" and given -999
 
UNCERTAINTY: +/-(.1 m) altitude (except 2 m measurements-see special comments); +/- 30% concentration (accuracy); concentration precision reported in columns
 
ULOD_FLAG: -777 

ULOD_VALUE: N/A
 
LLOD_FLAG: -888
 
LLOD_VALUE: N/A
 
DM_CONTACT_INFO: Joshua DiGangi; UW-Madison Chemistry Dept.; digangi@wisc.edu; 608-262-0269
 
PROJECT_INFO: BEARPEX field intensive; 15 June - 31 July, 2009; CA Sierra Nevada. 

STIPULATIONS_ON_USE: Do not quote or present without permission. Please contact PI before use.
 
OTHER_COMMENTS: For absolute concentration error, accuracy and precision errors must be propagated. Diagnostics (cell pressure, temperature, beam power) available upon request. 

REVISION: R0 

R0: Calibration not finalized, accuracy should improve by next revision
 
