Data Quality Reports for Session: 148155 User: bartforman Completed: 02/22/2013

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050501.1SGP/SIRS/E5 - NIP obstruction around sunrisesgpsirs20sE5.a0, sgpsirsE5.b1
D090121.1SGP/SIRS/E1 - Tracker inoperativesgpsirsE1.b1, sgpsirs20sE1.a0
D090424.3SGP/SIRS/E9 - Incorrect timestampsgpsirs20sE9.a0, sgpsirsE9.b1
D090520.1SGP/SIRS/E1 - Tracker failuresgpsirs20sE1.a0, sgpsirsE1.b1
D090520.2SGP/SIRS/E7 - NIP failuresgpsirs20sE7.a0, sgpsirsE7.b1
D090521.1SGP/SIRS/E27 - Reprocess: Incorrect calibration coefficientssgpsirs20sE27.a0, sgpsirsE27.b1
D090609.1SGP/SIRS/E27 - Tracker failuresgpsirsE27.b1, sgpsirs20sE27.a0
D090622.1SGP/SIRS/E24 - Downwelling SW data drop outsgpsirsE24.b1, sgpsirs20sE24.a0
D090623.1SGP/SIRS/C1 - SW direct normal data drop outsgpsirs20sC1.a0, sgpsirsC1.b1
D090720.1SGP/SIRS/E9 - Tracker failuresgpsirs20sE9.a0, sgpsirsE9.b1
D090923.3SGP/SIRS/E3 - Multiplexer problemsgpsirs20sE3.a0, sgpsirsE3.b1
D090929.2SGP/SIRS/C1 - Reprocessed: Upwelling shortwavesgpsirs20sC1.a0, sgpsirsC1.b1
D100128.1SGP/SIRS/E7 - Upwelling Longwave inconsistentsgpsirsE7.b1, sgpsirs20sE7.a0
D100325.1SGP/SIRS/E9 - Downwelling SW sensor alignment/levelsgpsirs20sE9.a0, sgpsirsE9.b1


DQRID : D050501.1
Start DateStart TimeEnd DateEnd Time
04/11/2005120011/02/20091417
Subject:
SGP/SIRS/E5 - NIP obstruction around sunrise
DataStreams:sgpsirs20sE5.a0, sgpsirsE5.b1
Description:
Due to instrument supports blocking the NIP, the short_direct_normal measurement readings 
dip for about 15 minutes at approximately 1200 UTC (at or near sunrise) on clear days 
during the bracketed time ranges for the entire duration of this deployment.  Affected time 
periods are 4/15-5/15 and 7/28-8/27 annually.

The instrument was removed from service 20091102.
Measurements:sgpsirs20sE5.a0:
  • inst_direct_normal
sgpsirsE5.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • short_direct_normal_std
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

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DQRID : D090121.1
Start DateStart TimeEnd DateEnd Time
01/13/2009160201/20/20092037
02/21/2009044503/04/20091645
Subject:
SGP/SIRS/E1 - Tracker inoperative
DataStreams:sgpsirsE1.b1, sgpsirs20sE1.a0
Description:
After a data outage 01/13 through 01/15, the solar tracker was inoperative until site 
operations corrected on 01/20.  

Another apparent power problem may have caused the tracker to not restart the morning of 
02/21.  It was reset by site operations on 03/04.

All tracker related datastreams are affected: short_direct_normal (NIP), 
down_short_diffuse_hemispheric (8-48) and possibly the down_long_hemispheric (PIR) although it is not 
apparent in the reviewed data for the affected timeframe.
Measurements:sgpsirs20sE1.a0:
  • inst_down_long_shaded_dome_resist
  • inst_direct_normal
  • Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
  • inst_diffuse
  • inst_down_long_shaded_case_resist
sgpsirsE1.b1:
  • down_long_hemisp_shaded_std
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • down_short_diffuse_hemisp_std
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • short_direct_normal_std

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DQRID : D090424.3
Start DateStart TimeEnd DateEnd Time
04/22/2009160004/24/20091606
Subject:
SGP/SIRS/E9 - Incorrect timestamp
DataStreams:sgpsirs20sE9.a0, sgpsirsE9.b1
Description:
The data collection computer lost communication with GPS for the affected time period at 
this site. The instrument time is not correct causing the data to be up to 30 minutes 
behind actual time by the end of the affected time period.  The time shift is not linear and 
no known time correction could be applied to the affected data streams.
More information is available contained in PIF P090429.1
Measurements:sgpsirs20sE9.a0:
  • base_time
  • alt
  • inst_diffuse
  • lat
  • inst_up_long_dome_resist
  • inst_up_long_case_resist
  • lon
  • inst_up_long_hemisp_tp
  • inst_direct_normal
  • Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
  • inst_up_short_hemisp
  • inst_global
  • time_offset
  • inst_down_long_shaded_dome_resist
  • inst_down_long_shaded_case_resist
sgpsirsE9.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
  • inst_down_long_shaded_case_temp
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • inst_down_long_shaded_dome_temp
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • time_offset
  • inst_up_long_dome_temp
  • vBatt
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • short_direct_normal_std
  • Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • base_time
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • alt
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
  • down_long_hemisp_shaded_std
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • inst_up_long_case_temp
  • Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • up_short_hemisp_std
  • Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
  • Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
  • up_long_hemisp_std
  • lon
  • down_short_hemisp_std
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
  • lat
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • down_short_diffuse_hemisp_std

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DQRID : D090520.1
Start DateStart TimeEnd DateEnd Time
05/15/2009113010/14/20091256
Subject:
SGP/SIRS/E1 - Tracker failure
DataStreams:sgpsirs20sE1.a0, sgpsirsE1.b1
Description:
The solar tracker stopped functioning sometime before sunrise on 05/15.  Numerous attempts 
were made to repair/realign the tracker, all futile. 

All daytime values of short_direct_normal and down_short_diffuse_hemisp were incorrect or 
suspect after ~11:30 GMT on May 15.

This facility is being decommissioned and maintenance efforts ceased 10/1/2009.  
Instrument was removed from service 10/14/2009.

Data are not recoverable.
Measurements:sgpsirs20sE1.a0:
  • inst_direct_normal
  • inst_diffuse
sgpsirsE1.b1:
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • down_short_diffuse_hemisp_std
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • short_direct_normal_std
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)

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DQRID : D090520.2
Start DateStart TimeEnd DateEnd Time
05/12/2009184808/18/20091930
Subject:
SGP/SIRS/E7 - NIP failure
DataStreams:sgpsirs20sE7.a0, sgpsirsE7.b1
Description:
The short_direct_normal data were reported as -9999 during this time period. The start of 
the bad data from the NIP instrument on 05/12 coincides with a SMOS report of 2 inches of 
rain.  

NIP data are not recoverable. Users can calculate short_direct normal component using 
component sum method as follows (for each minute of available data):

short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)
Measurements:sgpsirs20sE7.a0:
  • inst_direct_normal
sgpsirsE7.b1:
  • short_direct_normal_std
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)

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DQRID : D090521.1
Start DateStart TimeEnd DateEnd Time
05/20/2009164906/03/20092005
Subject:
SGP/SIRS/E27 - Reprocess: Incorrect calibration coefficients
DataStreams:sgpsirs20sE27.a0, sgpsirsE27.b1
Description:
Logger reverted to previous years configuration, possibly due to power outage and 
non-current logger program in storage module.  Note, the tracker had failed during this period as 
well.

The configurations are as follows:
Correct S/N and coefficients for this station during this time
Diffuse PSP:   33268F3
PSP-US:        30811F3
NIP:           29578E6
PSP-DS:        30903F3
Diffuse PSP: 118.49 W/(m^2*mV)
PSP-US:      116.66 W/(m^2*mV)
NIP:         123.30 W/(m^2*mV)
PSP-DS:      128.92 W/(m^2*mV)

Incorrect S/N and coefficients applied during this time range.
Diffuse PSP:   33366F3
PSP-US:        30961F3
NIP:           29009E6
PSP-DS:        20386F3
Diffuse PSP: 111.68 W/(m^2*mV)
PSP-US:      111.85 W/(m^2*mV)
NIP:         111.03 W/(m^2*mV)
PSP-DS:      104.15 W/(m^2*mV)

Data must be reprocessed for all shortwave instruments; longwave instruments are 
unaffected.  The following corrections must be applied:

down_short_diffuse_hemisp(new) = down_short_diffuse_hemisp(old) * 118.49/111.68
up_short_hemisp(new) = up_short_hemisp(old) * 116.66/111.85
short_direct_normal(new) = short_direct_normal(old) * 123.30 / 111.03
down_short_hemisp(new) = down_short_hemisp(old) * 128.92 / 104.15
Measurements:sgpsirsE27.b1:
  • down_short_diffuse_hemisp_std
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • down_short_hemisp_std
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • short_direct_normal_std
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
  • Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
  • up_short_hemisp_std
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
sgpsirs20sE27.a0:
  • inst_direct_normal
  • inst_up_short_hemisp
  • inst_diffuse
  • inst_global

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DQRID : D090609.1
Start DateStart TimeEnd DateEnd Time
05/20/2009164912/04/20092215
Subject:
SGP/SIRS/E27 - Tracker failure
DataStreams:sgpsirsE27.b1, sgpsirs20sE27.a0
Description:
Possible main power problem made may have caused the tracker to fail.  Attempts to restart 
the old tracker, subsequent replacement and lack of spares contributed to incorrect data 
from the NIP (short_direct_normal datastream) and 8-48 (down_short_diffuse_hemisp 
datastream) until the time of site decommissioning.  

This facility was decommissioned and maintenance efforts ceased 10/1/2009. The instrument 
was removed from service 12/04/2009.

Data are not recoverable.
Measurements:sgpsirsE27.b1:
  • down_short_diffuse_hemisp_std
  • short_direct_normal_std
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
sgpsirs20sE27.a0:
  • inst_direct_normal
  • inst_diffuse

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DQRID : D090622.1
Start DateStart TimeEnd DateEnd Time
06/22/2009151907/01/20091558
Subject:
SGP/SIRS/E24 - Downwelling SW data drop out
DataStreams:sgpsirsE24.b1, sgpsirs20sE24.a0
Description:
The down_short_hemisp (PSP instrument) data drop out due to loose connections.
Measurements:sgpsirsE24.b1:
  • down_short_hemisp_std
  • Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
sgpsirs20sE24.a0:
  • inst_global

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DQRID : D090623.1
Start DateStart TimeEnd DateEnd Time
06/18/2009175107/31/20091645
Subject:
SGP/SIRS/C1 - SW direct normal data drop out
DataStreams:sgpsirs20sC1.a0, sgpsirsC1.b1
Description:
NIP cable had failed during this time period.

Short_direct_normal data are not recoverable during this time period. However, it can be 
reconstructed using the following formula for each one minute data:
   short_direct_normal = (down_short_hemisp-down_short_diffuse_hemisp)/cos(zenith angle)
Measurements:sgpsirs20sC1.a0:
  • inst_direct_normal
sgpsirsC1.b1:
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • short_direct_normal_std
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

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DQRID : D090720.1
Start DateStart TimeEnd DateEnd Time
07/16/2009112407/21/20091520
03/20/2009121204/01/20091605
Subject:
SGP/SIRS/E9 - Tracker failure
DataStreams:sgpsirs20sE9.a0, sgpsirsE9.b1
Description:
The solar tracker was not functioning during these periods. During both failure events PM 
found the solar tracker in its parked position. PM reset the tracker and it resumed 
normal operations.

Data from instruments directly reliant on tracker operations (short_direct_normal, 
down_short_diffuse_hemisp) are not recoverable. The longwave data should not be affected.
Measurements:sgpsirs20sE9.a0:
  • inst_direct_normal
  • inst_diffuse
sgpsirsE9.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • short_direct_normal_std
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • down_short_diffuse_hemisp_std
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

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DQRID : D090923.3
Start DateStart TimeEnd DateEnd Time
09/10/2009135710/28/20091315
Subject:
SGP/SIRS/E3 - Multiplexer problem
DataStreams:sgpsirs20sE3.a0, sgpsirsE3.b1
Description:
The down_short_hemisp, down_long_shaded_hemisp and up_long_hemisp values drop out and 
spike during this time period due to a failing multiplexer. The problem was progressive and 
after 9/19 the mux had completely failed and those values go completely missing.  

The problem was not resolved since the site was scheduled for decommissioning. Preventive 
maintenance was ended as of Oct 1 2009. The instrument was removed from service 20091028.
Measurements:sgpsirs20sE3.a0:
  • inst_down_long_shaded_dome_resist
  • Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
  • inst_up_long_dome_resist
  • inst_up_long_case_resist
  • inst_global
  • inst_down_long_shaded_case_resist
  • inst_up_long_hemisp_tp
sgpsirsE3.b1:
  • Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
  • Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
  • inst_down_long_shaded_dome_temp
  • inst_up_long_dome_temp
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
  • up_long_hemisp_std
  • inst_down_long_shaded_case_temp
  • down_short_hemisp_std
  • Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • down_long_hemisp_shaded_std
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • inst_up_long_case_temp

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DQRID : D090929.2
Start DateStart TimeEnd DateEnd Time
09/14/2009051410/19/20092001
Subject:
SGP/SIRS/C1 - Reprocessed: Upwelling shortwave
DataStreams:sgpsirs20sC1.a0, sgpsirsC1.b1
Description:
The upwelling shortwave hemispheric data were bad 20090914-20091009 due to a broken 
instrument cable.  The cable was replaced on 10/09 at 1711 GMT but the leads were reversed. The 
leads were corrected 10/19 at 2001 GMT.

The data for 20090914-20091019 have been reprocessed. The bad data from 20090914-20091009 
were set to missing in the newly available reprocessed data set. The 20091009-20091019 
data were corrected by applying a (-1) multiplier.
Measurements:sgpsirs20sC1.a0:
  • inst_up_short_hemisp
sgpsirsC1.b1:
  • Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
  • up_short_hemisp_std
  • Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
  • Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)

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DQRID : D100128.1
Start DateStart TimeEnd DateEnd Time
05/23/2009160001/27/20101510
Subject:
SGP/SIRS/E7 - Upwelling Longwave inconsistent
DataStreams:sgpsirsE7.b1, sgpsirs20sE7.a0
Description:
The upwelling IR PIR instrument (up_long_hemisp) had bad connections during this time 
period.  The case thermistor (Mux set #2) was reading erratic values and corrupting the 
up_long_hemisp data completely. 

The net_ir was valid but cannot be corrected without the case thermistor measurement to 
determine the incoming IR (i.e. up_long_hemisp).
Measurements:sgpsirs20sE7.a0:
  • inst_up_long_hemisp_tp
  • inst_up_long_case_resist
  • inst_up_long_dome_resist
sgpsirsE7.b1:
  • up_long_hemisp_std
  • Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
  • inst_up_long_dome_temp
  • inst_up_long_case_temp
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

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DQRID : D100325.1
Start DateStart TimeEnd DateEnd Time
08/18/2009162503/16/20101518
Subject:
SGP/SIRS/E9 - Downwelling SW sensor alignment/level
DataStreams:sgpsirs20sE9.a0, sgpsirsE9.b1
Description:
On clear days, the down_short_hemisp data (PSP instrument) exhibit asymmetry in its daily 
output curve especially when compared to derived downwelling shortwave.  Ops corrected 
the problem by re-leveling the PSP on 3/16/2010. The issue may likely be due to a slowly 
sinking platform at this site or inadvertent loosening of instrument hold down screws.  

Problem may have developed slowly over the last year.  Corrections are not easily 
quantifiable.  Suggest using derived downwelling shortwave which is not dependent on the PSP 
instrument:

derived DS = down_short_diffuse + short_direct_normal * cos(zenith angle)
Measurements:sgpsirs20sE9.a0:
  • inst_global
sgpsirsE9.b1:
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
  • down_short_hemisp_std

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