Directories last modified: 10/2/97 KL These are the raw data files from the Table Mountain 1996 UV Spectroradiometer Intercomparison ancillary data set. Most data were logged on CR10 dataloggers using Universal Time(GMT). There are 7 loggers' data files containing the various broadband data: (note: files are named with the following convention: lliiijjj.yy where: ll is a two letter location abbreviation "tm" for Table Mountain iii is a three letter instrument designation "yst" for YES UVB1 reference set "2pr" for Eppley Pyrgeometer reference set "par" for LICOR PAR reference set "psp" for Eppley Pyranometer reference set "sst" for Solar Light 501A reference set "2se" for the 2 Scintec and 1 Eko UVB Broadbands "nip" for Eppley Pyrheliometer set of three jjj is the julian day of the most recent data in the file 170, 173, and 177 yy is the year). ##### 1) Yankee Environmental Systems UVB1 broadband radiometers ("yst"): The SRRB reference set of UVB1s were run for the duration of the intercomparison. Data was taken at a one second sampling rate and one minute average, standard deviation, and minimum were recorded. The serial numbers for the 3 reference UVB1s are: Reference UVB1 #1 940401 Reference UVB1 #2 940402 Reference UVB1 #3 940404. Calibration information for the UVB1s follows: Total 280-320nm equiv Irrad- use 1.97 (W/m^2)/V (YES cal 5/30/94). Diffey weighted equiv Irrad- use 0.136 (W/m^2)/V (table page 2-15 of manual). (note: 1/2 resistive dividers are NOT in place here. NO data*2 like 94&95). Thermistor conversion to Temp- use YSI #44011 (table at back of manual). The raw data files contain the following columns: program line out,yyyy,jjj,hhmm,uvb1#1(mV),uvb1#2(mV),uvb1#3(mV),empty, uvb1#1 thermistor(ohm),uvb1#2 thermistor(ohm),uvb1#3 thermistor(ohm),empty, uvb1#1 st dev,uvb1#2 st dev,uvb1#3 st dev,empty uvb1#1 therm st dev,uvb1#2 therm st dev,uvb1#3 therm st dev,empty uvb1#1 min(mV),uvb1#2 min(mV),uvb1#3 min(mV),empty. ##### 2) Eppley pyrgeometers PIRs ("2pr"): The SRRB reference set of PIRs were run for the duration of the intercomparison. Data was taken at a one second sampling rate and one minute average and standard deviation were recorded. The serial numbers for the 3 reference PIRs are: Reference PIR #1 29143 Reference PIR #2 29144 Reference PIR #3 29149. Calibration constants for SRRB PIR Reference set were calculated from an intercomparrison with 5 Round Robin PIRs. PMOD cal #s were used on the RR instruments and the reference set was forced to agree to the average of the RR set. The SRRB calibration numbers for the 3 reference instruments are: thermopile(C1) dome corr (C2) Ref#1 (29143) 3.62* 2.85 Ref#2 (29144) 3.65* 2.65 Ref#3 (29149) 3.86* 2.36 * units on cal #C1 for PIRs are E-6 V/(W/m^2), #C2 no units. Irradiance is calculated as follows: i) Given: Thermopile Voltage V (mV) Case Resistance Rc (ohm) Dome Resistance Rd (ohm) Calibration Coefficient C1 (V/(W/m^2)) Dome Correction Coefficient C2 (no units) Stephan-Boltzman Constant sigma=5.67x10-8(W/(m2K4)) ii) Calculate: Case Temperature Tc (K) Dome Temperature Td (K) Tc,d = 1E5/(273.09 + 26.3198*L + 0.278237*L^2 + 0.0196739*L^3) where L = ln(Rc,d/1000) and Rc,d is in ohms. iii) Calculate: Irradiance I (W/m2) I(W/m^2) = V/(1000*C1) + sigma*Tc^4 + C2*sigma*(Tc^4 - Td^4) where V is in (mV) Tc,d is in (K) C1 is in (V/(W/m^2)) sigma is in (W/(m^2K^4)). The raw data files contain the following columns: program line out,yyyy,jjj,hhmm,pir#1(mV),pir#2(mV),pir#3(mV), pir#1c(ohm),pir#1d(ohm),pir#2c(ohm),pir#2d(ohm),pir#3c(ohm),pir#3d(ohm), pir#1 st dev,pir#2 st dev,pir#3 st dev, pir#1c st dev,pir#1d st dev, pir#2c st dev,pir#2d st dev, pir#3c st dev,pir#3d st dev. ##### 3) LICOR Photosynthetically Active Radiation sensors ("par"): The SRRB reference set of PARs were run for the duration of the intercomparison. Data was taken at a one second sampling rate and one minute average and standard deviation were recorded. The serial numbers and calibration constants for the 3 reference PARs are: serial# cal # Reference PAR #1 Q20554 -194.93 * Reference PAR #2 Q20556 -174.22 * Reference PAR #3 Q20557 -181.49 * * units of cal # for PARs are umole/(s*m^2*uamp) (here u is "micro"=10e-6). The instruments were run with precision (1%) 604 ohm resistors across the outputs. With this, and the relationship 4.6 umole/(s*m^2) = 1 W/m^2, calibrations to W/m^2 from Voltage data become: Ref PAR #1 -70.159 E3 (W/m^2)/V Ref PAR #2 -62.705 E3 (W/m^2)/V Ref PAR #3 -65.322 E3 (W/m^2)/V The raw data files contain the following columns: program line out,yyyy,jjj,hhmm,par#1(mV),par#2(mV),par#3(mV), par#1 st dev,par#2 st dev,par#3 st dev. ##### 4) Eppley pyranometers ("psp"): The SRRB reference set of PSPs were run for the duration of the intercomparison. Data was taken at a one second sampling rate and one minute average and standard deviation were recorded. The serial numbers and calibration constants for the 3 reference PSPs are: serial# cal# Reference PSP #1 29613 8.528 (NREL 9/25/94) * Reference PSP #2 29614 8.306 (NREL 9/25/94) * Reference PSP #3 29616 8.316 (NREL 9/25/94) * * units on cal # for PSPs are E-6 V/(W/m^2). The raw data files contain the following columns: program line out,yyyy,jjj,hhmm,psp#1(mV),psp#2(mV),psp#3(mV),empty,empty,empty, psp#1 st dev,psp#2 st dev,psp#3 st dev,empty,empty,empty. ##### 5) Solar Ligh 501As ("sst"): The SRRB reference set of 501As were run for the duration of the intercomparison. Data was taken at a one second sampling rate and one minute average, standard deviation, and minimum were recorded. The serial numbers for the 3 reference 501As are: Reference 501A #1 1916 Reference 501A #2 2004 Reference 501A #3 2005 Calibration information for the 501As follows: Diffey weighted equiq Irrad- use 0.25 V/(MED/hr), where 1 MED/hr = 5.83E-6 W/cm^2. Temperature conversion use: T = 50*Vtemp - 25, (T in Celcius, Vtemp in Volts). The raw data files contain the following columns: program line out,yyyy,jjj,hhmm,501A#1(mV),501A#2(mV),501A#3(mV), 501A#1 temp(mV),501A#2 temp(V),501A#3 temp(V), 501A#1 st dev,501A#2 st dev,501A#3 st dev, 501A#1 temp st dev,501A#2 temp st dev,501A#3 temp st dev, 501A#1 min(mV),501A#2 min(mV),501A#3 min(mV). ##### 6) Scintec UV-S-290-T and Eko MS-210W/D UVB radiometers ("2se"): Two Scintec UV-S-290-T and one Eko (broadband UVB radiometers) were run for the duration of the intercomparison. Data was taken at a one second sampling rate and one minute average, standard deviation, and minimum were recorded. The serial numbers for the 2 Scintecs and 1 Eko are: Scintec #1 326 Scintec #2 330 Eko s91144.04 Calibration information for the Scintec and Eko instruments follows: Scintec: Diffey equiv Irrad- use 5.76 V/(W/m^2). Eko: Use 10 mV/(W/m^2), (the equiv spectral response is not given here, Assume total irradiance say 280-320nm). The raw data files contain the following columns: program line out,yyyy,jjj,hhmm,scin#1(mV),scin#2(mV),eko(mV), scin#1 temp (mV),scin#2 temp (mV), scin#1 st dev,scin#2 st dev,eko st dev,scin#1 temp st dev,scin#2 temp st dev, scin#1 min(mV),scin#2 min(mV),eko min(mV) Bad Data: tm2se274.96 (all), tm2se275.96 (0:00,19:20) ##### 7) Eppley Pyrheliometer ("nip"): A set of three NIPs were run for the duration of the intercomparison. Data was taken at a one second sampling rate and one minute average and standard deviation were recorded. The serial numbers and calibration constants for the 3 reference NIPs are: serial# cal# Reference NIP #1 16331 8.193 (NREL 9/15/95) * Reference NIP #2 16333 8.369 (NREL 9/15/95) * Reference NIP #3 29541 7.850 (NREL Sept 94) * * units on cal # for NIPs are E-6 V/(W/m^2). The raw data files contain the following columns: program line out,yyyy,jjj,hhmm,nip#1(mV),nip#2(mV),nip#3(mV), nip#1 st dev,nip#2 st dev,nip#3 st dev.