TWP/CSPHOT/C3 - Missing data

Data are missing and unrecoverable.

• Column precip water vapor(pwv)
• TripletVar_1020
• TripletVar_440
• time_offset
• TripletVar_340
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• base_time
• TripletVar_380
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• time
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• East longitude(lon)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_1640
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Altitude above mean sea level(alt)
• TripletVar_500
• timeObs
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• North latitude(lat)
• TripletVar_870
• last_processing_date
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• zenith
• WaterError

SGP/CSPHOT/C1 - Missing data

Data are missing and unrecoverable.

• aot_412
• TripletVar_555
• aot_490
• aot_551
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• aot_667
• TripletVar_1640
• aot_555
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_551
• TripletVar_412
• East longitude(lon)
• TripletVar_490
• timeObs
• TripletVar_870
• WaterError
• TripletVar_667
• Altitude above mean sea level(alt)
• last_processing_date
• TripletVar_1020
• time_offset
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• aot_532
• aot_531
• TripletVar_675
• North latitude(lat)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_531
• TripletVar_532
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• TripletVar_443
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_500
• aot_675
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_340
• TripletVar_380
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• base_time
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• aot_443
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)

TWP/CSPHOT/C2 - Battery Voltage Problem

The Cimel Internal Battery Voltage dropped below 5.0 V.
This caused satellite data transmissions to failed.  Therefore data are very sporadic 
during this time.  Collected data are probably usable.
The problem was aleviated for a two months period in Apr./May 2006, when the battery was 
replaced on or about 2006-03-27.
The problem recurred in June because the solar panels were corroded and unable to keep the 
battery charged.
The whole unit was replaced in Nov. 2006 and power is now provided by the site and data 
are transmitted via land-line.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Altitude above mean sea level(alt)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_380
• TripletVar_1640
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_670
• base_time
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_440
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• North latitude(lat)
• WaterError
• East longitude(lon)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• last_processing_date
• TripletVar_870
• zenith
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• time_offset
• time
• TripletVar_1020

SGP/CSPHOT/C1 - Unit #99 removed for upgrade

S/N 99 was returned to Aeronet for calibration/modification at the end of Sept.  On 
return, the upgraded and recalibrated instrument was relocated to be next to the SWS.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• North latitude(lat)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• East longitude(lon)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• TripletVar_870
• TripletVar_500
• WaterError
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Altitude above mean sea level(alt)
• TripletVar_340
• last_processing_date
• TripletVar_380
• TripletVar_1020
• time_offset
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• base_time
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)

SGP/CSPHOT/C1 - Not Performing Zenith Observations (Cloud Mode)

There were problems associated with the implementation of "cloud mode" on the upgraded 
CSPHOT system resulting from problems with the programming on the internal EPROM.  The 
"cloud mode" did not work properly and other observations were also affected. For example, 
early morning sun and almucantar observations were missing.

On 4/30/2007, the instrument was re-installed with cloud mode and was verified to be 
working.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• North latitude(lat)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• East longitude(lon)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• TripletVar_870
• TripletVar_500
• WaterError
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Altitude above mean sea level(alt)
• TripletVar_340
• last_processing_date
• TripletVar_380
• TripletVar_1020
• time_offset
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• base_time
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)

SGP/CSPHOT/C1 - Missing data

Data are missing and unrecoverable.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• North latitude(lat)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• East longitude(lon)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• TripletVar_870
• TripletVar_500
• WaterError
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Altitude above mean sea level(alt)
• TripletVar_340
• last_processing_date
• TripletVar_380
• TripletVar_1020
• time_offset
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• base_time
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)

SGP/CSPHOT/C1 - Not Performing Zenith Observations (Cloud Mode)

The instrument was temporarily replaced while the primary instrument was out for repairs. 
Data should be unaffected, however, zenith observations are not available during this 
time period.

On 4/30/2007, the primary instrument was re-installed with cloud mode and was verified to 
be working.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• North latitude(lat)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• East longitude(lon)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• TripletVar_870
• TripletVar_500
• WaterError
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Altitude above mean sea level(alt)
• TripletVar_340
• last_processing_date
• TripletVar_380
• TripletVar_1020
• time_offset
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• base_time
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)

TWP/CSPHOT/C2 - Missing data

Data are missing and unrecoverable.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Altitude above mean sea level(alt)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_380
• TripletVar_1640
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_670
• base_time
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_440
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• North latitude(lat)
• WaterError
• East longitude(lon)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• last_processing_date
• TripletVar_870
• zenith
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• time_offset
• time
• TripletVar_1020

TWP/CSPHOT/C2 - Instrument problem, pointing errors

A problem related to the instruments ability to successfully acquire the Sun, which later 
prompted the removal of the instrument for refurbishment, started to develop during this 
time period.
The data acquired and passed through the regular aeronet data quality checking routines is 
probably o.k., but should be used with caution.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Column precip water vapor(pwv)
• TripletVar_380
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_670
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• WaterError
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_870
• zenith
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_1020

NSA/CSPHOT/C1 - Missing data

Data are missing and unrecoverable.

• TripletVar_1640
• TripletVar_670
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_675
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• timeObs
• East longitude(lon)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• last_processing_date
• WaterError
• time
• TripletVar_412
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Altitude above mean sea level(alt)
• TripletVar_1020
• aot_551
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• base_time
• TripletVar_500
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_667
• aot_555
• time_offset
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_380
• aot_412
• TripletVar_531
• TripletVar_551
• TripletVar_532
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_340
• TripletVar_443
• TripletVar_555
• TripletVar_440
• aot_667
• zenith
• aot_490
• aot_443
• TripletVar_870
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• aot_675
• TripletVar_490
• aot_531
• aot_532
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• North latitude(lat)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)

HFE/CSPHOT/M1 - Missing data

Data are missing and unrecoverable.

• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• timeObs
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• North latitude(lat)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• zenith
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Altitude above mean sea level(alt)
• TripletVar_1020
• TripletVar_380
• TripletVar_870
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_440
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• East longitude(lon)
• time_offset
• base_time
• WaterError
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• last_processing_date
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• time
• TripletVar_670
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)

SGP/CSPHOT/C1 - Instrument failure

There was a distinct cosine curve in the AOD data, which indicated a problem with the 
instrument, possibly due to a bad eprom in the control box.  The instrument was removed from 
service on 7/24/08 and replaced on 9/24/08.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_870
• TripletVar_500
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Altitude above mean sea level(alt)
• TripletVar_340
• TripletVar_380
• TripletVar_1020
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)

SGP/CSPHOT/C1 - AOT 1640 channel data missing

AOT 1640 channel data missing.  The instrument deployed at SGP from September 2008 to July 
2010 was not upgraded with this additional channel.

• TripletVar_1640
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

TWP/CSPHOT/C2 - Obstruction in collimator tubes and sensor head

Spiderwebs were found in the collimator tubes and sensor head. This caused errors in the 
data indicated by the cosine curve in the AOT data.

• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

TWP/CSPHOT/C2 - Instrument problem

Data is suspect due to problems with the rain sensor and clock setting being offset.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Column precip water vapor(pwv)
• TripletVar_380
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_670
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• WaterError
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_870
• zenith
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_1020

GRW/CSPHOT/M1 - Obstruction in collimator tube

Data are suspect. There is a discrepancy between the 1640 channel and the other channels. 
The discrepancy is possibly related to the intermittent obstruction (a lizard) found in 
the collimator tube. There may also be ongoing degradation of the instrument possibly 
related to the lizard activity and deposits.

• TripletVar_670
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_870
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_500
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• TripletVar_1020
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_340
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Column precip water vapor(pwv)
• TripletVar_1640
• TripletVar_380
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• WaterError
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)

GRW/CSPHOT/M1 - Instrument scanning problem

There were problems with the almucantar scans causing difficulty in tracking the sun 
between the almucantar scans for each wavelength. 

The instrument was due for calibration and maintenance. This unit was replaced on 
5/6/2010.

• TripletVar_670
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_870
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• zenith
• TripletVar_500
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• TripletVar_1020
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_340
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Column precip water vapor(pwv)
• TripletVar_1640
• TripletVar_380
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• WaterError
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)

NSA/CSPHOT/C1 - Instrument Problems

Data should not be used during this time period due to problems relating to 
re-installation of the instrument after calibration. Problems were resolved by April 8, 2010.

• TripletVar_1640
• TripletVar_670
• TripletVar_870
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_1020
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_380
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Column precip water vapor(pwv)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• TripletVar_340
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_440
• TripletVar_500
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• zenith
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• WaterError
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)

TWP/CSPHOT/C2 - 340 nm filter degradation.

There was 340 nm filter degradation in the Nauru Cimel Sunphotometer starting 11/1/2009.  
The 340 AOD was in disagreement with other channels sporadically starting 11/1/2009 and 
consistently off from the other channels by March 2010.  Therefore 340 AOD channel should 
not be used until the unit is replaced.  

The 340 nm filter will be changed when the instrument is sent back for calibration.

• TripletVar_340
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)

TWP/CSPHOT/C2 - Problem with sensor head

Data are suspect due to problems with instrument.  There was a broken strap for the sensor 
head. Also, data are only available later in the day, after hour 0 GMT for all days 
3/18/10 to 4/20/2010, possibly related to problems with the cables and/or sensor head.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Column precip water vapor(pwv)
• TripletVar_380
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_670
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• WaterError
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_870
• zenith
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_1020

TWP/CSPHOT/C2 - Obstruction in collimator tubes

Spiderwebs were found in the collimator tubes. This caused errors in the data, showing 
diurnal dependence in the AOT data.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Column precip water vapor(pwv)
• TripletVar_380
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_670
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• WaterError
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_870
• zenith
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_1020

SGP/CSPHOT/C1 - Robot errors/Obstruction in tubes

Data are questionable due to problems with the robot and possible obstruction in 
collimator tubes.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_870
• TripletVar_500
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_340
• TripletVar_380
• TripletVar_1020
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)

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.

• Column precip water vapor(pwv)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• WaterError
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_870
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_440
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• zenith
• TripletVar_500
• TripletVar_670
• TripletVar_340
• TripletVar_1020
• TripletVar_380
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)

SBS/CSPHOT/M1 - Missing data

Data are missing and unrecoverable.

• Column precip water vapor(pwv)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• WaterError
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_870
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• timeObs
• TripletVar_440
• last_processing_date
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• zenith
• TripletVar_500
• TripletVar_670
• TripletVar_340
• TripletVar_1020
• base_time
• TripletVar_380
• time
• East longitude(lon)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• time_offset
• Altitude above mean sea level(alt)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• North latitude(lat)

TWP/CSPHOT/C3 - Intermittent (morning) missing data

There was a problem with the connection to the robot head causing dark current spikes that 
occurred most frequently in the morning. This resulted in missing data in the morning 
hours (21-23 GMT).  For data that is available during this time period, use the quality 
assured level 2.0 AOT data from AERONET when available (datastream name 
twpcsphotaotfiltqaC3.a1).

• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_1640
• TripletVar_1020
• TripletVar_440
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_500
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_870
• TripletVar_380
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• zenith
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• WaterError
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)

TWP/CSPHOT/C1 - Missing Data

Data are missing and unrecoverable.

• TripletVar_1020
• TripletVar_340
• TripletVar_1640
• TripletVar_440
• timeObs
• TripletVar_500
• TripletVar_380
• time
• TripletVar_870
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• East longitude(lon)
• time_offset
• Altitude above mean sea level(alt)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• North latitude(lat)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• base_time
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• WaterError
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• last_processing_date

TWP/CSPHOT/C1 - Obstruction in collimator tubes

During these time periods, there were obstructions in the collimator tubes, causing 
"InGaAs/Silicon Discrepancy" errors . A wasp nest was found. The blockages caused discrepancies 
in the data between the 1640 and the other channels. The 340 and 380 channels are also 
off.

• TripletVar_1020
• TripletVar_340
• TripletVar_500
• TripletVar_440
• TripletVar_1640
• TripletVar_380
• TripletVar_870
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• WaterError
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)

PGH/CSPHOT/M1 - Instrument in manual mode

A problem with the wet sensor disrupted the automatic data collection mode for the 
instrument from 8/8-9/28.  During this time, the instrument was occasionally run in manual mode. 
During manual runs, some data, including almucantar and principle planes were collected 
and are available for use.  However, there are large gaps in the AOT data.

• base_time
• TripletVar_670
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• East longitude(lon)
• TripletVar_500
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Altitude above mean sea level(alt)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• time_offset
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_870
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Column precip water vapor(pwv)
• TripletVar_1020
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• TripletVar_1640
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_440
• time
• WaterError
• zenith
• North latitude(lat)
• TripletVar_380
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_340
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• last_processing_date
• timeObs

GAN/CSPHOT/M1 - Instrument problem, Obstruction, collimator

During this time period, there were obstructions in the collimator tubes, causing 
"InGaAs/Silicon Discrepancy" errors. Webs were found. The blockages caused discrepancies in the 
data between the 1640 and the other channels.

• TripletVar_1640
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

SGP/CSPHOT/C1 - Solar tracking and Connector panel problem

Robot errors and issues with the connector panels resulted in an inability to find the Sun 
and therefore only cloud mode zenith radiance data were taken during this time.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_500
• TripletVar_870
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_1640
• TripletVar_340
• TripletVar_380
• TripletVar_670
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_1020
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

TWP/CSPHOT/C1  - Filter degradation

Channels 340,380 and 1640 are in disagreement with the other channels, possibly due to 
degradation of filters or a problem with the InGaAs detector.  There were also 
"InGaAs/Silicon Discrepancy" errors reported during this time.

• TripletVar_1020
• TripletVar_340
• TripletVar_500
• TripletVar_440
• TripletVar_1640
• TripletVar_380
• TripletVar_870
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• WaterError
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)

PVC/CSPHOT/M1 - Missing Data

Data are missing and unrecoverable.

• TripletVar_500
• TripletVar_440
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_380
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• East longitude(lon)
• WaterError
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• North latitude(lat)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• base_time
• TripletVar_870
• last_processing_date
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Altitude above mean sea level(alt)
• TripletVar_1020
• TripletVar_1640
• zenith
• time_offset
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_340
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• time
• TripletVar_670
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Column precip water vapor(pwv)

NSA/CSPHOT/C1 - Tracking failure

Instrument was not acquiring the sun due to a problem with the head leveling. Data during 
this period are questionable.

• TripletVar_1640
• TripletVar_670
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_380
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• timeObs
• East longitude(lon)
• TripletVar_340
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_440
• zenith
• last_processing_date
• WaterError
• time
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_870
• Altitude above mean sea level(alt)
• TripletVar_1020
• Column precip water vapor(pwv)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• base_time
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_500
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• North latitude(lat)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• time_offset

TWP/CSPHOT/C2 - Obstruction in collimator tubes

Spiderwebs were found in the collimator tubes. This caused errors in the data
indicated by the cosine curve in the AOT data.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Column precip water vapor(pwv)
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_380
• TripletVar_1640
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_870
• TripletVar_670
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_440
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_1020

TWP/CSPHOT/C1 - Obstruction in collimator tubes

During this time period, there were obstructions in the collimator tubes, causing 
"InGaAs/Silicon Discrepancy" errors . A wasp nest was found. The blockages caused discrepancies 
in the data between the 1640 and the other channels.

• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_340
• TripletVar_1020
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_1640
• TripletVar_440
• TripletVar_500
• TripletVar_380
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• WaterError
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_870
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)

TWP/CSPHOT/C3 - Intermittent missing data

Due to possible cable restrictions, there was intermittent data loss during this time 
period. There should be no affect on data that was collected.

• Column precip water vapor(pwv)
• TripletVar_1020
• TripletVar_440
• time_offset
• TripletVar_340
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• base_time
• TripletVar_380
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• time
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• East longitude(lon)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_1640
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Altitude above mean sea level(alt)
• TripletVar_500
• timeObs
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• North latitude(lat)
• TripletVar_870
• last_processing_date
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• zenith
• WaterError

TWP/CSPHOT/C1 - Obstruction in collimator tubes

During this time period, data were suspect due to obstructions in the collimator tubes.  
The instrument was also due for calibration.

• TripletVar_1020
• TripletVar_340
• TripletVar_500
• TripletVar_440
• TripletVar_1640
• TripletVar_380
• TripletVar_870
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• WaterError
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)

TWP/CSPHOT/C2 - Obstruction in collimator tubes

During this time period, there were obstructions in the collimator tubes. This caused 
errors in the data, showing diurnal dependence in the AOT data

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Column precip water vapor(pwv)
• TripletVar_380
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_670
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• TripletVar_500
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• WaterError
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_870
• zenith
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_1020

SGP/CSPHOT/C1 - Obstruction

There was a possible obstruction or instrument malfunction, causing errors in the data and 
showing diurnal dependence in the AOT data.

Use the quality assured level 2.0 AOT data from AERONET when available 
(sgpcsphotaotfiltqaC1.a1). Level 2.0 data and post-calibration level 1.5 data should become available in 
2014. Users can also use MFRSR data if available.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_870
• TripletVar_500
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_340
• TripletVar_380
• TripletVar_1020
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)

ENA/CSPHOT/C1 - Missing data

The data is missing and unrecoverable.

• zenith
• time
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• TripletVar_440
• TripletVar_380
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• base_time
• Altitude above mean sea level(alt)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_670
• time_offset
• Column precip water vapor(pwv)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• East longitude(lon)
• last_processing_date
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• TripletVar_1020
• timeObs
• TripletVar_500
• North latitude(lat)
• TripletVar_870

ENA/CSPHOT/C1 - Obstruction in collimator tubes

Data are questionable due to possible obstruction in collimator tubes.

• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_670
• Column precip water vapor(pwv)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• TripletVar_440
• TripletVar_380
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• TripletVar_1020
• TripletVar_500
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_870

OLI/CSPHOT/M1 - Missing Data - Battery/Power failure

Data is missing due to issues with the power and battery.

• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Altitude above mean sea level(alt)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_500
• base_time
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• last_processing_date
• WaterError
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• TripletVar_380
• TripletVar_870
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Column precip water vapor(pwv)
• time_offset
• TripletVar_1020
• East longitude(lon)
• TripletVar_670
• TripletVar_340
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• North latitude(lat)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_440

MAO/CSPHOT/M1 - Obstruction

An obstruction in the collimator caused a discrepancy in the 1640 channel.

• TripletVar_1640
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

TMP/CSPHOT/M1 - Obstruction

An obstruction in the collimator caused a discrepancy in the 1640 channel.

• TripletVar_1640
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

OLI/CSPHOT/M1 -  Data missing

CSPHOT Instrument stopped working due to the failure of  AC adaptor.

• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Altitude above mean sea level(alt)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_500
• base_time
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• last_processing_date
• WaterError
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• TripletVar_380
• TripletVar_870
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Column precip water vapor(pwv)
• time_offset
• TripletVar_1020
• East longitude(lon)
• TripletVar_670
• TripletVar_340
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• North latitude(lat)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_440

MAO/CSPHOT/M1 - Instrument and power failure

Data are missing and are unrecoverable.

• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_670
• TripletVar_340
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• time
• East longitude(lon)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• base_time
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Altitude above mean sea level(alt)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• time_offset
• Column precip water vapor(pwv)
• TripletVar_500
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_870
• WaterError
• TripletVar_1640
• last_processing_date
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• TripletVar_1020
• zenith
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• North latitude(lat)
• timeObs
• TripletVar_380

MAO/CSPHOT/M1 - 340 nm Filter Problem

The 340 nm channel is suspect due to a filter issue.

• TripletVar_340
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)

SGP/CSPHOT/C1 - Obstruction

Spiderwebs found in the collimator tubes affected the 1640 channel data.

• TripletVar_1640
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

SGP/CSPHOT/C1 - Aerosol Optical Depth biased high for unknown reasons

During this time period the aerosol optical depth is biased high by about +1. It 
apparently corrected itself at the end of this period so the cause of the offset is undetermined. 
It likely affected all the other data-products as well. The 3 point variance used to 
filter cloud affected observations are also unusually high even for cloud free days, so most 
data will already be marked bad automatically in the higher order products.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_500
• TripletVar_870
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_1640
• TripletVar_340
• TripletVar_380
• TripletVar_670
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_1020
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

SGP/CSPHOT/C1 - Instrument Problem

There was a possible obstruction or instrument malfunction causing errors in the data and 
showing diurnal dependence in the AOT data.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_870
• TripletVar_500
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_340
• last_processing_date
• TripletVar_380
• TripletVar_1020
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)

OLI/CSPHOT/M1 -  Data Missing due to Winter Calibration

Data were missing due to winter calibration of the instrument. The instrument was down 
during this time period.

• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Altitude above mean sea level(alt)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_500
• base_time
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• last_processing_date
• WaterError
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• TripletVar_380
• TripletVar_870
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Column precip water vapor(pwv)
• time_offset
• TripletVar_1020
• East longitude(lon)
• TripletVar_670
• TripletVar_340
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• North latitude(lat)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_440

OLI/CSPHOT/M1 -  Data Missing due to Winter Calibration

Data missing due to winter calibration of the instrument. The instrument was down during 
this time period.

• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Altitude above mean sea level(alt)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_500
• base_time
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• last_processing_date
• WaterError
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• TripletVar_380
• TripletVar_870
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Column precip water vapor(pwv)
• time_offset
• TripletVar_1020
• East longitude(lon)
• TripletVar_670
• TripletVar_340
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• North latitude(lat)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_440

MAO/CSPHOT/M1 - Instrument obstruction

An obstruction in the collimator caused a discrepancy in the 1640 channel.

• TripletVar_1640
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

ENA/CSPHOT/C1 - Obstruction in collimator tubes

Data are questionable due to possible obstruction in collimator tubes.

• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_670
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• TripletVar_440
• TripletVar_380
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_340
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• TripletVar_1020
• TripletVar_500
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_870

MAO/CSPHOT/M1 - Instrument Problem - Obstruction

Data are questionable due to obstruction in collimator tubes.

• Column precip water vapor(pwv)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_500
• TripletVar_340
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_870
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_1640
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_1020
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_380

ENA/CSPHOT/C1 - Water in collimator tubes

Data are questionable due to the water found in collimator tubes.

• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_1640

SGP/CSPHOT/C1 - PWV data affected by filter degradation

PWV Data are questionable due to filter degradation.

• Column precip water vapor(pwv)

SGP Site Power Outage Due to Winter Storm

On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought 
sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result 
was very very slick roads and mass power outages.
 
The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th.  
The power was restored on 7:56 PM CDT on Wednesday, December 30th
 
Site Emergency procedures were activated and Technicians drained water out of instrument 
reservoirs and other measures as needed, early Monday morning.
 
On Wednesdays as roads and power started was restored to much of the areas east of I-35 , 
Site Technicians performed maintenance on several Extended Facilities.

During this period, data are potentially missing, incorrect, or suspect.  Carefully 
inspect the data before use.

• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• TripletVar_1640
• North latitude(lat)
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• East longitude(lon)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• zenith
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_440
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_500
• timeObs
• TripletVar_870
• WaterError
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Altitude above mean sea level(alt)
• TripletVar_340
• last_processing_date
• TripletVar_380
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• TripletVar_1020
• time_offset
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Column precip water vapor(pwv)
• base_time
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)

ENA/C1 - Reprocess: Slightly incorrect location fields

Some of the instruments are being processed with the previous "GRW-Azores" lat/lon/alt 
instead of the new "ENA-Azores" lat/lon/alt. The differences are minor, but will be 
corrected. The respective GRW and ENA lat, lon, and alt values are as follows:
 
GRW  lat = 39.0911 ;
ENA lat = 39.0916 ;
GRW  lon = -28.0297 ;
ENA  lon = -28.0257 ;
GRW  alt = 26 ;
ENA  alt = 30.48 ;

• East longitude(lon)
• Altitude above mean sea level(alt)
• North latitude(lat)

MAO/CSPHOT/M1 - No post-deployment calibration

The instrument deployed during this period was lost on the way back to the US. Therefore, 
it could not be recalibrate as is customary. The differences between pre- and 
post-deployment calibrations for such a short deployment are typically quite small, 1%. But 
occasionally there are dramatic shifts that we now won't know about.

• Column precip water vapor(pwv)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• TripletVar_500
• TripletVar_340
• TripletVar_670
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_870
• WaterError
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• TripletVar_1640
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• TripletVar_1020
• TripletVar_440
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• TripletVar_380

OLI/CSPHOT/M1 -  a problem of instrument alignment

The instrument was unable to track the SUN due to the problem of alignment.  No data was 
collected.

• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Altitude above mean sea level(alt)
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• TripletVar_500
• base_time
• time
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• last_processing_date
• WaterError
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• zenith
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• TripletVar_380
• TripletVar_870
• TripletVar_1640
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Column precip water vapor(pwv)
• time_offset
• TripletVar_1020
• East longitude(lon)
• TripletVar_670
• TripletVar_340
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• North latitude(lat)
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• TripletVar_440

AWR/CSPHOT/M1 - Missing data due to Winter Calibration

Data missing due to winter calibration of the instrument. The instrument was down during 
this time period.

• aot_532
• TripletVar_670
• TripletVar_870
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_675
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• aot_531
• TripletVar_500
• Column precip water vapor(pwv)
• TripletVar_380
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• aot_675
• TripletVar_412
• TripletVar_667
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• aot_667
• North latitude(lat)
• aot_551
• aot_555
• aot_412
• TripletVar_551
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_555
• aot_490
• TripletVar_490
• time
• zenith
• TripletVar_1640
• aot_443
• time_offset
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Altitude above mean sea level(alt)
• TripletVar_531
• last_processing_date
• TripletVar_532
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_340
• TripletVar_443
• TripletVar_440
• base_time
• East longitude(lon)
• TripletVar_1020
• WaterError

AWR/CSPHOT/M1 - Missing the data of the 1640 nm channel

The CSPHOT unit #85 is a very old model and was not upgraded to include the 1640 nm 
channel. The data of the 1640 nm channel is missing for these time-periods when the CSPHOT unit 
#85 was installed at AWR.

• TripletVar_1640
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)

AWR/CSPHOT/M1 - Missing data

The data are missing due to an instrument malfunction.

• aot_532
• TripletVar_670
• TripletVar_870
• Aerosol optical thickness, at 380 nm, from CSPHOT(aot_380)
• Aerosol optical thickness, angstrom coefficient, at 440-870 nm, from CSPHOT(Angstrom440_870)
• TripletVar_675
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, polarized(Angstrom440_675_Polar)
• aot_531
• TripletVar_500
• Column precip water vapor(pwv)
• TripletVar_380
• Aerosol optical thickness, at 500 nm, from CPSHOT(aot_500)
• Aerosol optical thickness, at 670 nm, from CSPHOT(aot_670)
• timeObs
• Aerosol optical thickness, angstrom coefficient, at 380-500 nm, from CSPHOT(Angstrom380_500)
• Aerosol optical thickness, at 340 nm, from CSPHOT(aot_340)
• aot_675
• TripletVar_412
• TripletVar_667
• Aerosol optical thickness, angstrom coefficient, at 440-675 nm, from CSPHOT(Angstrom440_675)
• Aerosol optical thickness, at 1640 nm, from CSPHOT(aot_1640)
• North latitude(lat)
• aot_667
• aot_551
• aot_555
• aot_412
• TripletVar_551
• Aerosol optical thickness, angstrom coefficient, at 500-870 nm, from CSPHOT(Angstrom500_870)
• Aerosol optical thickness, angstrom coefficient, at 340-440 nm, from CSPHOT(Angstrom340_440)
• TripletVar_555
• aot_490
• TripletVar_490
• time
• zenith
• aot_443
• time_offset
• TripletVar_1640
• Aerosol optical thickness, at 440 nm, from CSPHOT(aot_440)
• Altitude above mean sea level(alt)
• TripletVar_531
• last_processing_date
• TripletVar_532
• Aerosol optical thickness, at 870 nm, from CSPHOT(aot_870)
• Aerosol optical thickness, at 1020 nm, from CSPHOT(aot_1020)
• TripletVar_340
• TripletVar_443
• TripletVar_440
• base_time
• East longitude(lon)
• TripletVar_1020
• WaterError