We did not have the opportunity to calibrate the pyrgeometers prior to the start of PCAPS, and therefore used old thermopile calibration factors for the Kipp & Zonen CG4 and Eppley PIR pyrgeometers. These were subsequently recalibrated in the NOAA black body on March 8 & 10, 2011. The following table lists multiplicative correction factors for Rpile outputs during the PCAPS field program.
Sensor |
Location |
Position |
Pre-ops |
Post-ops |
Correction |
k* |
|---|---|---|---|---|---|---|
|
|
|
uV-m^2/W |
uV-m^2/W |
pre/post |
|
PIR 031980 |
Playa (1) |
in |
3.58 |
3.58 |
1.000 |
4.0 |
PIR 031976 |
Playa |
out |
3.93 |
3.74 |
1.051 |
3.5 |
PIR 031975 |
ABC (2) |
in |
3.97 |
3.98 |
0.997 |
3.5 |
PIR 031978 |
ABC |
out |
3.50 |
3.53 |
0.992 |
4.0 |
CG4 050824 |
Highland (3) |
in |
14.09 |
13.81 |
1.020 |
NA |
CG4 040740 |
Highland |
out |
7.85 |
7.76 |
1.012 |
NA |
CG4 030675 |
West Valley (4) |
in |
9.97 |
9.93 |
1.004 |
NA |
CG4 040741 |
West Valley |
out |
8.82 |
8.76 |
1.007 |
NA |
PIR 031979 |
East Slope (5) |
in |
3.99 |
3.81 |
1.047 |
4.5 |
PIR 031981 |
East Slope |
out |
3.69 |
3.66 |
1.008 |
3.5 |
CG4 100225 |
West Slope (6) |
in |
11.93 |
11.28 |
1.058 |
NA |
CG4 100226 |
West Slope |
out |
11.51 |
10.81 |
1.065 |
NA |
CG4 050823 |
Riverton (7) |
in |
9.32 |
9.21 |
1.012 |
NA |
CG4 030676 |
Riverton |
out |
11.27 |
11.21 |
1.005 |
NA |
*per Ellsworth Dutton, blackbody values for k have been increased by 0.3 and then rounded up to nearest 0.5