Data Quality Reports for Session: 110760 User: miao Completed: 02/28/2008


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D021111.1NSA/SKYRAD/C1 - Unshaded PIR data unreasonablensaskyrad60sC1.a1
D021111.11NSA/SKYRAD/C1 - PIR data suspectnsaskyrad60sC1.a1
D021111.14NSA/SKYRAD/C1 - Shaded PIR data unreasonablensaskyrad60sC1.a1
D021111.15NSA/SKYRAD/C1 - Corrupted Shaded PIR datansaskyrad60sC1.a1
D021111.16NSA/SKYRAD/C1 - Shaded PIR data unreasonablensaskyrad60sC1.a1
D021111.17NSA/SKYRAD/C1 - Unshaded and Shaded PIR data badnsaskyrad60sC1.a1
D021111.19NSA/SKYRAD/C1 - PIR data suspectnsaskyrad60sC1.a1
D021111.2NSA/SKYRAD/C1 - Corrupted Unshaded PIR datansaskyrad60sC1.a1
D021111.21NSA/SKYRAD/C1 - Shaded PIR data suspectnsaskyrad60sC1.a1
D021111.22NSA/SKYRAD/C1 - PIR data suspectnsaskyrad60sC1.a1
D021111.23NSA/SKYRAD/C1 - Shaded PIR data incorrectnsaskyrad60sC1.a1
D021111.3NSA/SKYRAD/C1 - Spikes in Unshaded PIR datansaskyrad60sC1.a1
D021111.4NSA/SKYRAD/C1 - Discontinuity in Unshaded PIR datansaskyrad60sC1.a1
D021111.5NSA/SKYRAD/C1 - Unshaded PIR data incorrectnsaskyrad60sC1.a1
D021213.1NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnightnsaskyrad60sC1.a1
D021213.3NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnightnsaskyrad60sC1.a1
D030510.2NSA/SKYRAD/C1 - IRT measurements during precipitation eventsnsaskyrad60sC1.a1
D981212.1NSA/SKYRAD - Barrow SKYRAD PIRD Misconfiguration 12/9 - 12/12/98nsaskyrad20sC1.a1, nsaskyrad60sC1.a1
D990108.2NSA/SKYRAD/C1 - IRT removed for repairnsaskyrad60sC1.a1, nsaskyradC1.00
D990108.3NSA/SKYRAD/C1 - IRT insufficiently insulatednsaskyrad60sC1.a1, nsaskyradC1.00
D990108.4NSA/SKYRAD/C1 - IRT insufficiently insulatednsaskyrad60sC1.a1, nsaskyradC1.00
D990108.5NSA/SKYRAD/C1 - IRT removed from servicensaskyrad60sC1.a1, nsaskyradC1.00
D990924.2NSA/SKYRAD/C1 - IRT insufficiently heatednsaskyrad60sC1.a1


DQRID : D021111.1
Start DateStart TimeEnd DateEnd Time
01/12/1999220001/12/19992230
01/17/1999050001/17/19990730
01/24/1999120001/24/19991400
02/13/1999070002/13/19992359
02/19/1999054502/20/19991030
02/20/1999211502/21/19990200
Subject:
NSA/SKYRAD/C1 - Unshaded PIR data unreasonable
DataStreams:nsaskyrad60sC1.a1
Description:
Periods of very large negative values. 
Negative readings of thermistors caused concurrent calculation 
in logger of temperature to fail.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)


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DQRID : D021111.11
Start DateStart TimeEnd DateEnd Time
10/28/1998030010/28/19980500
10/29/1998060010/29/19980800
11/07/1998010011/07/19980400
11/12/1998030011/12/19981200
11/23/1998090011/23/19982100
Subject:
NSA/SKYRAD/C1 - PIR data suspect
DataStreams:nsaskyrad60sC1.a1
Description:
PIR shaded and PIR unshaded show unusual differences during this time period, frosting or 
icing is the most probable explanation but we don't know for sure.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)


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DQRID : D021111.14
Start DateStart TimeEnd DateEnd Time
01/12/1999220001/12/19992230
01/17/1999050001/17/19990730
01/24/1999120001/24/19991400
02/13/1999070002/13/19992359
02/19/1999054502/20/19991030
02/20/1999211502/21/19990200
Subject:
NSA/SKYRAD/C1 - Shaded PIR data unreasonable
DataStreams:nsaskyrad60sC1.a1
Description:
Periods of very large negative values. 
Negative readings of thermistors causes concurrent calculation 
in logger of temperature to fail.
Measurements:nsaskyrad60sC1.a1:
  • PIR shaded maximum(pirs_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)


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DQRID : D021111.15
Start DateStart TimeEnd DateEnd Time
11/18/1998210511/18/19982110
11/20/1998034011/20/19980350
11/20/1998201011/20/19982020
11/24/1998033011/24/19980340
11/25/1998014511/25/19980150
11/25/1998203011/25/19982035
11/26/1998030011/26/19980310
11/26/1998153011/26/19981540
11/27/1998011011/27/19980120
11/27/1998084011/27/19980850
11/27/1998092511/27/19980935
11/27/1998194011/27/19981950
11/28/1998065511/28/19980705
11/29/1998045011/29/19980505
11/29/1998233511/29/19982350
Subject:
NSA/SKYRAD/C1 - Corrupted Shaded PIR data
DataStreams:nsaskyrad60sC1.a1
Description:
Erroneous data due to file truncation problem during logger download and corresponding 
ingest problems when the truncated lines were read. Problem was identified in a PIF 
submitted by Rune Storvold
Measurements:nsaskyrad60sC1.a1:
  • PIR shaded maximum(pirs_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)


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DQRID : D021111.16
Start DateStart TimeEnd DateEnd Time
12/11/1998222512/11/19982235
12/15/1998180012/15/19981810
12/16/1998181012/16/19981815
02/16/1999194502/16/19992010
02/17/1999214502/17/19992200
03/02/1999182503/02/19991835
03/09/1999183003/09/19991840
03/10/1999034003/10/19990350
Subject:
NSA/SKYRAD/C1 - Shaded PIR data unreasonable
DataStreams:nsaskyrad60sC1.a1
Description:
There was  a 10-25 W/m2 spike in data probably due to operator working around instrument 
or cleaning it.
Measurements:nsaskyrad60sC1.a1:
  • PIR shaded maximum(pirs_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)


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DQRID : D021111.17
Start DateStart TimeEnd DateEnd Time
01/17/1999170001/17/19991815
Subject:
NSA/SKYRAD/C1 - Unshaded and Shaded PIR data bad
DataStreams:nsaskyrad60sC1.a1
Description:
Large unreasonable spikes and some missing data points. Cause of problem unknown.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR shaded maximum(pirs_max)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR1 unshaded mean(pir1_mean)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)


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DQRID : D021111.19
Start DateStart TimeEnd DateEnd Time
10/28/1998030010/28/19980500
10/29/1998060010/29/19980800
11/07/1998010011/07/19980400
11/12/1998030011/12/19981200
11/23/1998090011/23/19982100
Subject:
NSA/SKYRAD/C1 - PIR data suspect
DataStreams:nsaskyrad60sC1.a1
Description:
PIR shaded and PIR unshaded show unusual differences during this time period, frosting or 
icing is one possible explanation but we don't know.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR shaded maximum(pirs_max)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR1 unshaded mean(pir1_mean)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)


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DQRID : D021111.2
Start DateStart TimeEnd DateEnd Time
11/14/1998200011/14/19982005
11/18/1998210511/18/19982110
11/20/1998034011/20/19980350
11/20/1998201011/20/19982020
11/24/1998033011/24/19980340
11/25/1998014511/25/19980150
11/25/1998203011/25/19982035
11/26/1998030011/26/19980310
11/26/1998153011/26/19981540
11/27/1998011011/27/19980120
11/27/1998084011/27/19980850
11/27/1998092511/27/19980935
11/27/1998194011/27/19981950
11/28/1998065511/28/19980705
11/29/1998045011/29/19980505
11/29/1998233511/29/19982350
Subject:
NSA/SKYRAD/C1 - Corrupted Unshaded PIR data
DataStreams:nsaskyrad60sC1.a1
Description:
Erroneous data due to file truncation problem during logger download and corresponding 
ingest problems when the truncated lines were read. Problem was identified in a PIF 
submitted by Rune Storvold
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)


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DQRID : D021111.21
Start DateStart TimeEnd DateEnd Time
12/08/1998000012/15/19981200
Subject:
NSA/SKYRAD/C1 - Shaded PIR data suspect
DataStreams:nsaskyrad60sC1.a1
Description:
The instrument had incorrect calibration settings on two accounts: 1. From 12/09 to 12/12, 
the calibration was set incorrectly. 2. The dome correction coefficients were not 
properly set until the early morning of 12/14. The erroneous settings caused an error probably 
less than 4%.
Measurements:nsaskyrad60sC1.a1:
  • PIR shaded maximum(pirs_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)


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DQRID : D021111.22
Start DateStart TimeEnd DateEnd Time
12/14/1998000002/04/19992359
Subject:
NSA/SKYRAD/C1 - PIR data suspect
DataStreams:nsaskyrad60sC1.a1
Description:
The PIR unshaded and the PIR shaded have a persistent offset between them, ranging from 0 
to 10 W/m2. It is particularly apparent during clear sky. The line of sight of the PIRd 
is obstructed making it difficult to assess the problem. The instrument was moved to its 
proper location in early February. The problem seems to have resolved itself with the move.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR shaded maximum(pirs_max)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR1 unshaded mean(pir1_mean)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)


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DQRID : D021111.23
Start DateStart TimeEnd DateEnd Time
02/11/1999000002/11/19992359
Subject:
NSA/SKYRAD/C1 - Shaded PIR data incorrect
DataStreams:nsaskyrad60sC1.a1
Description:
There were two sudden increases (about 50-100 W/m2) at 23:00 and 24:00.
Measurements:nsaskyrad60sC1.a1:
  • PIR shaded maximum(pirs_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)


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DQRID : D021111.3
Start DateStart TimeEnd DateEnd Time
12/01/1998220012/01/19982359
01/28/1999014501/28/19990200
03/02/1999182003/02/19991835
03/10/1999174003/10/19991750
03/13/1999174503/13/19991755
Subject:
NSA/SKYRAD/C1 - Spikes in Unshaded PIR data
DataStreams:nsaskyrad60sC1.a1
Description:
There was  a 10-25 W/m2 spike in data probably due to operator working around instrument 
or cleaning it.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)


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DQRID : D021111.4
Start DateStart TimeEnd DateEnd Time
02/03/1999230002/03/19992310
Subject:
NSA/SKYRAD/C1 - Discontinuity in Unshaded PIR data
DataStreams:nsaskyrad60sC1.a1
Description:
There was a sudden increase in irradiance (from 140 to 190 W/m2) at 02/03/99 23:00.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)


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DQRID : D021111.5
Start DateStart TimeEnd DateEnd Time
12/08/1998000012/10/19982359
Subject:
NSA/SKYRAD/C1 - Unshaded PIR data incorrect
DataStreams:nsaskyrad60sC1.a1
Description:
Data from this time period is incorrect because instrument was swapped out for 
calibration and correct calibrations were not entered for replacement.  Some 
missing data during this time interval as well
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)


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DQRID : D021213.1
Start DateStart TimeEnd DateEnd Time
05/01/1998000008/10/19980000
Subject:
NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight
DataStreams:nsaskyrad60sC1.a1
Description:
Around local midnight 9:30-10:30 GMT during summer clear sky the normal incidence 
pyranometer is shaded by the instrument stand.This causes the reading to be 0 W/m2. If cosine 
correction is applied for irradiance calulations this effect is negligible due to the low 
solar angle.
Measurements:nsaskyrad60sC1.a1:
  • NIP maximum(nip_max)
  • NIP standard deviation(nip_sd)
  • NIP minimum(nip_min)
  • NIP mean(nip_mean)


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DQRID : D021213.3
Start DateStart TimeEnd DateEnd Time
05/01/1998000008/10/19980000
Subject:
NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight
DataStreams:nsaskyrad60sC1.a1
Description:
Just past local midnight (11:00-11:40 GMT during summer clear sky) the global 
hemispherical pyranometer is shaded by the MFRSR instrument for about 40 minutes. This causes the 
reading to be 0 W/m2. This effect would be negligible in a daily average due to the low 
solar angle.
Measurements:nsaskyrad60sC1.a1:
  • PSP1 unshaded mean(psp1_mean)
  • PSP1 unshaded minimum(psp1_min)
  • PSP1 unshaded maximum(psp1_max)
  • PSP1 unshaded standard deviation(psp1_sd)


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DQRID : D030510.2
Start DateStart TimeEnd DateEnd Time
02/14/1998233003/03/20032359
Subject:
NSA/SKYRAD/C1 - IRT measurements during precipitation events
DataStreams:nsaskyrad60sC1.a1
Description:
The IRT measurement of sky/cloud temperature was in question during precipitation events 
because rain or snow could accumulate in the upward-pointed lens barrel. This was 
corrected by reorienting the IRT to measure the sky temperature as reflected by a gold mirror.
Measurements:nsaskyrad60sC1.a1:
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)


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DQRID : D981212.1
Start DateStart TimeEnd DateEnd Time
12/09/1998000012/12/19982359
Subject:
NSA/SKYRAD - Barrow SKYRAD PIRD Misconfiguration 12/9 - 12/12/98
DataStreams:nsaskyrad20sC1.a1, nsaskyrad60sC1.a1
Description:
The PIRD was incorrectly set from 12/9/98 to 12/12/98 that resulted in an 
error of approximately 3.7% (was set to 243902 instead of 235294).
Measurements:nsaskyrad20sC1.a1:
  • lon(lon)
  • Instantaneous UVB temperature(uvb_temp)
  • Instantaneous UVB uncorrected irradiance(uvb_uncorr_irradiance)
  • lat(lat)
  • Dummy altitude for Zeb(alt)
  • Instantaneous PIR2 uncorrected irradiance(pir2_uncorr_irradiance)
  • Instantaneous PIR1 uncorrected irradiance(pir1_uncorr_irradiance)
  • Instantaneous PIR2 case thermistor(pir2_case_therm)
  • Instantaneous PIR1 dome thermistor(pir1_dome_therm)
  • Instantaneous PIR2 dome thermistor(pir2_dome_therm)
  • Time offset of tweaks from base_time(time_offset)
  • base time(base_time)
  • GPS raw data filename(filename)
  • Instantaneous PIR1 case thermistor(pir1_case_therm)

nsaskyrad60sC1.a1:
  • PSP shaded minimum(psps_min)
  • PIR1 unshaded maximum(pir1_max)
  • IRT1 minimum(irt1_min)
  • PSP shaded standard deviation(psps_sd)
  • NIP mean(nip_mean)
  • PIR1 unshaded standard deviation(pir1_sd)
  • NIP maximum(nip_max)
  • Time offset of tweaks from base_time(time_offset)
  • UVB minimum(uvb_min)
  • PSP shaded maximum(psps_max)
  • PIR shaded standard deviation(pirs_sd)
  • PSP shaded mean(psps_mean)
  • Bit data. See details.(bit_data)
  • PIR shaded minimum(pirs_min)
  • IRT1 mean(irt1_mean)
  • base time(base_time)
  • PSP1 unshaded mean(psp1_mean)
  • Dummy altitude for Zeb(alt)
  • PSP1 unshaded minimum(psp1_min)
  • PIR1 unshaded minimum(pir1_min)
  • NIP standard deviation(nip_sd)
  • Logger panel temperature(logger_temp)
  • PSP1 unshaded standard deviation(psp1_sd)
  • IRT1 maximum(irt1_max)
  • UVB mean(uvb_mean)
  • PSP1 unshaded maximum(psp1_max)
  • UVB maximum(uvb_max)
  • PIR shaded maximum(pirs_max)
  • PIR1 unshaded mean(pir1_mean)
  • External voltage(external_voltage)
  • IRT1 standard deviation(irt1_sd)
  • Battery Voltage(internal_voltage)
  • GPS raw data filename(filename)
  • NIP minimum(nip_min)
  • lat(lat)
  • PIR shaded mean(pirs_mean)
  • lon(lon)
  • UVB standard deviation(uvb_sd)


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DQRID : D990108.2
Start DateStart TimeEnd DateEnd Time
03/16/1998190010/28/19981300
Subject:
NSA/SKYRAD/C1 - IRT removed for repair
DataStreams:nsaskyrad60sC1.a1, nsaskyradC1.00
Description:
The instrument was damaged by internal water condensation caused by the 
exterior foam insulation used to keep the IRT above freezing. It was returned 
in July 1998 to the manufacturer for repair.
Measurements:nsaskyrad60sC1.a1:
  • IRT1 maximum(irt1_max)
  • IRT1 standard deviation(irt1_sd)
  • IRT1 minimum(irt1_min)
  • IRT1 mean(irt1_mean)

nsaskyradC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D990108.3
Start DateStart TimeEnd DateEnd Time
10/28/1998130011/21/19981840
Subject:
NSA/SKYRAD/C1 - IRT insufficiently insulated
DataStreams:nsaskyrad60sC1.a1, nsaskyradC1.00
Description:
IRT was reinstalled with insufficient insulation to maintain an
internal reference temperature above 0 degrees C.
Measurements:nsaskyrad60sC1.a1:
  • IRT1 maximum(irt1_max)
  • IRT1 standard deviation(irt1_sd)
  • IRT1 minimum(irt1_min)
  • IRT1 mean(irt1_mean)

nsaskyradC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D990108.4
Start DateStart TimeEnd DateEnd Time
12/03/1998000012/10/19981400
Subject:
NSA/SKYRAD/C1 - IRT insufficiently insulated
DataStreams:nsaskyrad60sC1.a1, nsaskyradC1.00
Description:
IRT was reinstalled with insufficient insulation to maintain an
internal reference temperature above 0 degrees C.
Measurements:nsaskyrad60sC1.a1:
  • IRT1 maximum(irt1_max)
  • IRT1 standard deviation(irt1_sd)
  • IRT1 minimum(irt1_min)
  • IRT1 mean(irt1_mean)

nsaskyradC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D990108.5
Start DateStart TimeEnd DateEnd Time
11/21/1998180012/03/19980000
Subject:
NSA/SKYRAD/C1 - IRT removed from service
DataStreams:nsaskyrad60sC1.a1, nsaskyradC1.00
Description:
Instrument was removed to check performance.
Measurements:nsaskyrad60sC1.a1:
  • IRT1 maximum(irt1_max)
  • IRT1 standard deviation(irt1_sd)
  • IRT1 minimum(irt1_min)
  • IRT1 mean(irt1_mean)

nsaskyradC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D990924.2
Start DateStart TimeEnd DateEnd Time
02/14/1998013012/21/20001925
Subject:
NSA/SKYRAD/C1 - IRT insufficiently heated
DataStreams:nsaskyrad60sC1.a1
Description:
IRT had insufficient heating to maintain an internal reference temperature above 0 degrees 
C. Measurements of sky temperature were over-estimated when instrument was below 
freezing.
Measurements:nsaskyrad60sC1.a1:
  • IRT1 maximum(irt1_max)
  • IRT1 standard deviation(irt1_sd)
  • IRT1 minimum(irt1_min)
  • IRT1 mean(irt1_mean)


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