SBS/CSPHOT/M1 - Malfunctions due to extreme cold

The CSPHOT motors and electronics experienced problems at the extreme cold temperatures (< 
-25 C) experienced at Steamboat Springs during this period. There were alignment 
problems and InGaAs/Silicon Discrepancy errors reported during the period of 1/1/2011-1/11/2011. 
There were robot errors reported during the coldest days of 2/1-2/4. Some data may be 
missing during that time period. The instrument ultimately had a robot malfunction on 2/14.  

Low temperatures may have affected the calibration accuracy during this time period. This 
can also affect the cloud screened data (level 1.5,  sbscsphotaotfiltM1.a1 data).  The 
cloud screening may filter out more data than expected on clear days.

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• Azimuth of Radar Ray(azimuth)
• Almucantar Sky Radiance(alm_rad)
• Solar ZenithAngle(zenith)

• Triplet Variability at 500 nm(TripletVar_500)
• Solar ZenithAngle(zenith)
• AOT at 1020 nm(aot_1020)
• Triplet Variability at 340 nm(TripletVar_340)
• Triplet Variability at 1020 nm(TripletVar_1020)
• AOT at 870 nm(aot_870)
• AOT at 670 nm(aot_670)
• Triplet Variability at 870 nm(TripletVar_870)
• Angstrom Coefficient 500-870(Angstrom500_870)
• Triplet Variability at 670 nm(TripletVar_670)
• Aerosol Optical Depth at 440 nm(aot_440)
• Precipitable water vapor(pwv)
• Triplet Variability at 440 nm(TripletVar_440)
• AOT at 1640 nm(aot_1640)
• Angstrom Coefficient 440-675 Polar(Angstrom440_675_Polar)
• Triplet Variability at 1640 nm(TripletVar_1640)
• Water Error(WaterError)
• Angstrom Coefficient 440-675(Angstrom440_675)
• Angstrom Coefficient 340-440(Angstrom340_440)
• Angstrom Coefficient 440-870(Angstrom440_870)
• Aerosol Optical Depth at 340 nm(aot_340)
• Triplet Variability at 380 nm(TripletVar_380)
• Aerosol Optical Depth at 380 nm(aot_380)
• Angstrom Coefficient 380-500(Angstrom380_500)
• Aerosol Optical Depth at 500 nm(aot_500)

• Aerosol Optical Depth at 340 nm(aot_340)
• Aerosol Optical Depth at 380 nm(aot_380)
• Triplet Variability at 870 nm(TripletVar_870)
• Triplet Variability at 670 nm(TripletVar_670)
• AOT at 1020 nm(aot_1020)
• AOT at 670 nm(aot_670)
• Angstrom Coefficient 440-870(Angstrom440_870)
• Angstrom Coefficient 440-675(Angstrom440_675)
• Triplet Variability at 440 nm(TripletVar_440)
• Aerosol Optical Depth at 500 nm(aot_500)
• Angstrom Coefficient 340-440(Angstrom340_440)
• Triplet Variability at 1640 nm(TripletVar_1640)
• AOT at 1640 nm(aot_1640)
• Water Error(WaterError)
• Precipitable water vapor(pwv)
• Angstrom Coefficient 380-500(Angstrom380_500)
• Angstrom Coefficient 500-870(Angstrom500_870)
• AOT at 870 nm(aot_870)
• Angstrom Coefficient 440-675 Polar(Angstrom440_675_Polar)
• Triplet Variability at 380 nm(TripletVar_380)
• Triplet Variability at 340 nm(TripletVar_340)
• Solar ZenithAngle(zenith)
• Triplet Variability at 500 nm(TripletVar_500)
• Triplet Variability at 1020 nm(TripletVar_1020)
• Aerosol Optical Depth at 440 nm(aot_440)

• View Zenith Angle(view_zenith)
• Principle Plane Sky Radiance(pp_rad)
• Solar ZenithAngle(zenith)