SRRL BMS Raw Data: Preset Calculations
December 1, 2017 to December 31, 2019
| 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 (CG4) [+/-15 deg C] | ({Downwelling IR CG4 Vent [W/m^2]}/(0.80*5.6704E-8))**0.25-273.15 | 1 | 0 |
| Ground Temp (CG3) [+/-5 deg C] | ({Upwelling IR CG3 [W/m^2]}/(0.92*5.6704E-8))**0.25-273.15 | 1 | 0 |
| Effective Net IR (Res Thm 1) | {Downwelling IR PIR Vent [W/m^2]}-5.6704E-8*{Research Thm 1}**4 | 1 | 0 |
| Research (Tc-Te) | {PIR DW Case Temp [deg K]}-({Downwelling IR PIR Vent [W/m^2]}/5.6704E-8)**0.25 | 1 | 0 |
| Research (Moist Flag) | 1 | (({Deck RH [%]}>=80)&&(({PIR DW Case Temp [deg K]}-({Downwelling IR PIR Vent [W/m^2]}/5.6704E-8)**0.25)<=6)) | 0 |
| Research PWV (mm) | 30.132653*{Tower RH [%]}*exp((18.678-{Tower Dry Bulb Temp [deg C]}/234.5)*({Tower Dry Bulb Temp [deg C]}/(257.14+{Tower Dry Bulb Temp [deg C]})))/(273.15+{Tower Dry Bulb Temp [deg C]}) | (({Tower Dry Bulb Temp [deg C]}>-257.14)&&({Tower RH [%]}>=0)) | (missing) |
| Langley TWC 500nm | log({500nm TWC Photometer [V]}) | (({500nm TWC Photometer [V]}>0)&&({Airmass}>0)) | (missing) |
| Langley POM 315nm | log({315nm POM-01 Photometer [nA]}) | (({315nm POM-01 Photometer [nA]}>0)&&({Airmass}>0)) | (missing) |
| Langley POM 400nm | log({400nm POM-01 Photometer [uA]}) | (({400nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)) | (missing) |
| Langley POM 500nm | log({500nm POM-01 Photometer [uA]}) | (({500nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)) | (missing) |
| Langley POM 675nm | log({675nm POM-01 Photometer [uA]}) | (({675nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)) | (missing) |
| Langley POM 870nm | log({870nm POM-01 Photometer [uA]}) | (({870nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)) | (missing) |
| Langley POM 940nm | log({940nm POM-01 Photometer [uA]}) | (({940nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)) | (missing) |
| Langley POM 1020nm | log({1020nm POM-01 Photometer [uA]}) | (({1020nm POM-01 Photometer [uA]}>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) |
| Langley POM 315nm (Clear) | log({315nm POM-01 Photometer [nA]}) | (({315nm POM-01 Photometer [nA]}>0)&&({Airmass}>0)&&({Broadband Turbidity}<0.1)) | (missing) |
| Langley POM 400nm (Clear) | log({400nm POM-01 Photometer [uA]}) | (({400nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)&&({Broadband Turbidity}<0.1)) | (missing) |
| Langley POM 500nm (Clear) | log({500nm POM-01 Photometer [uA]}) | (({500nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)&&({Broadband Turbidity}<0.1)) | (missing) |
| Langley POM 675nm (Clear) | log({675nm POM-01 Photometer [uA]}) | (({675nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)&&({Broadband Turbidity}<0.1)) | (missing) |
| Langley POM 870nm (Clear) | log({870nm POM-01 Photometer [uA]}) | (({870nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)&&({Broadband Turbidity}<0.1)) | (missing) |
| Langley POM 940nm (Clear) | log({940nm POM-01 Photometer [uA]}) | (({940nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)&&({Broadband Turbidity}<0.1)) | (missing) |
| Langley POM 1020nm (Clear) | log({1020nm POM-01 Photometer [uA]}) | (({1020nm POM-01 Photometer [uA]}>0)&&({Airmass}>0)&&({Broadband Turbidity}<0.1)) | (missing) |
| Global VIS (CM22-RG780-TUVR) | {Global CMP22 (vent/cor) [W/m^2]}-{Global RG780 PSP [W/m^2]}-{Global TUVR [W/m^2]} | 1 | 0 |
| Direct VIS (CH1-RG780-TUVR) | {Direct CHP1-1 [W/m^2]}-{Direct RG780 NIP [W/m^2]}-{Direct TUVR [W/m^2]} | 1 | 0 |
| Wind Direction Delta (6-19ft) | abs({Avg Wind Direction @ 6ft [deg from N]}-{Avg Wind Direction @ 19ft [deg from N]}) | 1 | 0 |
| Wind Direction Delta (19-22ft) | abs({Avg Wind Direction @ 19ft [deg from N]}-{Avg Wind Direction @ 22ft [deg from N]}) | 1 | 0 |
| Wind Direction Delta (22-33ft) | abs({Avg Wind Direction @ 22ft [deg from N]}-{Avg Wind Direction @ 33ft [deg from N]}) | 1 | 0 |
| 40-Tilt Incidence Angle [deg] | (180/3.1415926536)*(acos(cos({Zenith Angle [degrees]}*3.1415926536/180)*cos(-40*3.1415926536/180)+sin(-40*3.1415926536/180)*sin({Zenith Angle [degrees]}*3.1415926536/180)*cos({Azimuth Angle [degrees]}*3.1415926536/180))) | (({Zenith Angle [degrees]}>=0)&&({Azimuth Angle [degrees]}>=0)) | (missing) |
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.