SRRL BMS Raw Data: Preset Calculations
January 1, 2006 to August 31, 2008
| Calculation name | Equation | Condition to compute | Value during failed condition |
|---|---|---|---|
| Sky Temp (PIR) [+/-15 deg C] | ({Downwelling IR PIR Vent [W/m^2]}/(0.80*5.6704E-8))**0.25-273.15 | 1 | 0 |
| Ground Temp (PIR) [+/-5 deg C] | ({Upwelling IR PIR [W/m^2]}/(0.92*5.6704E-8))**0.25-273.15 | 1 | 0 |
| Sky Temp (CNR1) [+/-15 deg C] | ({Downwelling IR CG3 (CNR1) [W/m^2]}/(0.80*5.6704E-8))**0.25-273.15 | 1 | 0 |
| Ground Temp (CNR1) [+/-5 deg C] | ({Upwelling IR CG3 (CNR1) [W/m^2]}/(0.92*5.6704E-8))**0.25-273.15 | 1 | 0 |
| Sky Temp (CG4) [+/-15 deg C] | ({Downwelling IR CG4 Vent [W/m^2]}/(0.80*5.6704E-8))**0.25-273.15 | 1 | 0 |
| Langley TWC 500nm | log({500nm TWC Photometer [V]}) | (({500nm TWC Photometer [V]}>0)&&({Airmass}>0)) | (missing) |
| Langley TWC 500nm (Clear) | log({500nm TWC Photometer [V]}) | (({500nm TWC Photometer [V]}>0)&&({Airmass}>0)&&({Broadband Turbidity}<0.1)) | (missing) |
| Global VIS (PSPV-RG780-TUVR) | {Global PSP Vent [W/m^2]}-{Global RG780 PSP Vent [W/m^2]}-{Global TUVR [W/m^2]} | 1 | 0 |
| Direct VIS (NIP2-RG780-CUVA2-CUVB2) | {Direct NIP #2 [W/m^2]}-{Direct RG780 NIP [W/m^2]}-{Direct CUVA2 [W/m^2]}-{Direct CUVB2 [W/m^2]} | 1 | 0 |
| Effective Net IR (DW PIR) | {Downwelling IR PIR Vent [W/m^2]}-5.6704E-8*{PIR DW Case Temp [deg K]}**4 | 1 | 0 |
| Effective Net IR (DW CG4) | {Downwelling IR CG4 Vent [W/m^2]}-5.6704E-8*{CG4 DW Case Temp [deg K]}**4 | 1 | 0 |
| Effective Net IR (DW CG3) | {Downwelling IR CG3 (CNR1) [W/m^2]}-5.6704E-8*{CNR1 Case Temp [deg K]}**4 | 1 | 0 |
| Wind Direction Delta (22-42ft) | abs({Avg Wind Direction @ 22ft [deg from N]}-{Avg Wind Direction @ 42ft [deg from N]}) | 1 | 0 |
| RSR Estimated Pressure [mBar] | 1013.25*exp((-0.02896*9.8*1829)/(8.314*({Tower Dry Bulb Temp [deg C]}+273.15))) | 1 | 0 |
Preset calculations are performed on the fly, as requested by user.
Calculation is only performed when condition equation is true, otherwise the failed condition value is output
Plots using a Langley calculation will be plotted versus airmass (instead of time) and will also include a linear fit with slope & intercept.
Wind Direction Deltas are special cases that go beyond the equations listed above to keep the data in the 0 to 180 degree realm.