Data Quality Reports for Session: 101526 User: yan Completed: 09/11/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D030306.1TWP/SKYRAD/C3 - reprocess: PIR identified as unshaded is really shadedtwpskyrad60sC3.b1
D030821.6TWP/SKYRAD/C3 - IRT incorrect min/delta valuestwpskyrad60sC3.b1
D040812.4TWP/SKYRAD/C3 - UVB Data questionable/incorrect due to uncontrolled sensor temperaturetwpskyrad20sC3.a1, twpskyrad60sC3.a1, twpskyrad60sC3.b1
D040812.5TWP/SKYRAD/C3 - UVB Data questionable/incorrect due to uncontrolled sensor temperaturetwpskyrad20sC3.a1, twpskyrad60sC3.b1
D040904.2TWP/SKYRAD/C3 - Incorrect NIP cal coefficienttwpskyrad60sC3.b1
D050104.1TWP/SKYRAD/C3 - Reprocess: NIP calibrations incorrecttwpskyradC3.00, twpskyrad60sC3.b1
D051114.3TWP/SKYRAD/C3 - tracker inoperativetwpskyradC3.00, twpskyrad20sC3.a0, twpskyrad60sC3.b1
D051202.3TWP/SKYRAD/C3 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2
downwelling longwave		twpskyrad60sC3.b1
D060110.3TWP/SKYRAD/C3 - IRT damagedtwpskyrad20sC3.a0, twpskyrad60sC3.b1
D060217.1TWP/SKYRAD/C3 - Tracker stoppedtwpskyrad60sC3.b1
D060223.7TWP/SKYRAD/C3 - Solar Tracker locking at solar noontwpskyradC3.00, twpskyrad20sC3.a0, twpskyrad20sC3.a1, twpskyrad60sC3.b1
D060630.33TWP/SKYRAD/C3 - Reprocess: Longwave Calibration errortwpskyrad60sC3.b1


DQRID : D030306.1
Start DateStart TimeEnd DateEnd Time
03/12/2002073806/25/20022359
Subject:
TWP/SKYRAD/C3 - reprocess: PIR identified as unshaded is really shaded
DataStreams:twpskyrad60sC3.b1
Description:
From the initial installation of the Darwin SKYRAD
suite of instruments, two shaded PIRs were installed
rather than one shaded and one unshaded PIR as 
documented in the netcdf header information.
Measurements:twpskyrad60sC3.b1:
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_unshaded_std)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)

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DQRID : D030821.6
Start DateStart TimeEnd DateEnd Time
03/12/2002073803/01/20032359
Subject:
TWP/SKYRAD/C3  - IRT incorrect min/delta values
DataStreams:twpskyrad60sC3.b1
Description:
For field sky_ir_temp, the value of valid_min was incorrectly assigned to -49.7 C and no 
value of valid_delta was assigned. The actual values should be -60 and 50 C, respectively.
Measurements:twpskyrad60sC3.b1:
  • Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)

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DQRID : D040812.4
Start DateStart TimeEnd DateEnd Time
03/12/2002073803/01/20032359
Subject:
TWP/SKYRAD/C3 - UVB Data questionable/incorrect due to uncontrolled sensor temperature
DataStreams:twpskyrad20sC3.a1, twpskyrad60sC3.a1, twpskyrad60sC3.b1
Description:
The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.
Measurements:twpskyrad60sC3.b1:
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
  • Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
twpskyrad60sC3.a1:
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
  • Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
twpskyrad20sC3.a1:
  • Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
  • Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)

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DQRID : D040812.5
Start DateStart TimeEnd DateEnd Time
03/02/2003000005/19/20042200
Subject:
TWP/SKYRAD/C3 - UVB Data questionable/incorrect due to uncontrolled sensor temperature
DataStreams:twpskyrad20sC3.a1, twpskyrad60sC3.b1
Description:
The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.
Measurements:twpskyrad60sC3.b1:
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
  • Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
twpskyrad20sC3.a1:
  • Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
  • Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)

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DQRID : D040904.2
Start DateStart TimeEnd DateEnd Time
05/24/2004000009/02/20042350
Subject:
TWP/SKYRAD/C3 - Incorrect NIP cal coefficient
DataStreams:twpskyrad60sC3.b1
Description:
During our site visit comparison at Darwin we observed that the skyrad NIP was reading 
about 50 w/m2 lower than the comparison cavity radfiometer and the replacement NIP on the 
comparison stand. We found that the calibration coefficient for the NIP (responsivity at 
45o)was put in as 8.64X10-6. The NIP was new and had not been calibrated at SGP. The 
factory number was 8.04X10-6. We corrected the calibration coefficient and the instruments 
agreed to better than 5 w/m2.
Measurements:twpskyrad60sC3.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

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DQRID : D050104.1
Start DateStart TimeEnd DateEnd Time
05/20/2004000009/02/20040400
Subject:
TWP/SKYRAD/C3 - Reprocess: NIP calibrations incorrect
DataStreams:twpskyradC3.00, twpskyrad60sC3.b1
Description:
On 05/20 during installtion of the new Campbell datalogger system and associated program 
the NIP (S/N 33551E6) was assigned an incorrect calibration coefficient.  A coefficient of 
116.01 W/m2/mV was applied when it should have been 124.378 W/m2/mV.
TWP reports SV0405D and SV0409D detail the activities which lead to this DQR.
Measurements:twpskyradC3.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
twpskyrad60sC3.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

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DQRID : D051114.3
Start DateStart TimeEnd DateEnd Time
11/14/2005045312/02/20050000
Subject:
TWP/SKYRAD/C3 - tracker inoperative
DataStreams:twpskyradC3.00, twpskyrad20sC3.a0, twpskyrad60sC3.b1
Description:
A lightning strike at Darwin removed the tracker from service.  Instruments installed on 
the tracker were rendered either inoperative or were not shaded during this time period.  
The longwave hemispheric instruments PIR1 and PIR2 appear to have been unaffected.  They 
are not suseptable to incorrect tracker operation.  The downwelling hemispheric shortwave 
PSP instrument mounted on Skyrad will not be affected by incorrect tracker operation.
Measurements:twpskyradC3.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
twpskyrad60sC3.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
twpskyrad20sC3.a0:
  • Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
    Voltage(inst_direct_normal)
  • Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
    Thermopile Voltage(inst_diffuse)

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DQRID : D051202.3
Start DateStart TimeEnd DateEnd Time
05/21/2004000009/09/20052012
Subject:
TWP/SKYRAD/C3 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 
downwelling longwave
DataStreams:twpskyrad60sC3.b1
Description:
The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1" 
and the PIR2 dome thermistor called "Dome2" were discovered to have been incorrectly set 
to 0 in the Skyrad datalogger program when the new CR23X based Skyrad loggers were 
installed.  The result of no delay in these measurements results in an error in the measured 
resistance of the thermistors, Case1 and Dome2, and thus the calculated PIR1 and PIR2 
irradiances.  The errors are inversely proportial to temperature.

Users can apply temperature dependent irradiance corrections as shown in the table below.  
Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2 
W/m2. The error corrections become the same order of magnitude or larger than the instrument 
uncertainties at or below 260K or 9F. Irradiance Correction Table for Skyrad (TWP and 
NSA) DIR1 and DIR2 Irradiance

		DIR1	DIR1	DIR2	DIR2
	T[F]	Tcase[K]	Correction[W/m2]	Tdome[K]       
		Correction[W/m2]
	109.4	316.13	0.00	316.13	0.00
	100.5	311.20	-0.15	311.20	0.12
	93.2	307.14	-0.12	307.14	0.10
	87.0	303.70	-0.10	303.70	0.08
	81.6	300.70	-0.17	300.70	0.14
	77.0	298.15	-0.22	298.15	0.18
	59.4	288.35	-0.34	288.35	0.27
	47.4	281.72	-0.23	281.72	0.18
	38.5	276.74	-0.42	276.74	0.34
	31.3	272.77	-0.48	272.77	0.38
	25.4	269.48	-0.61	269.48	0.49
	20.3	266.67	-0.67	266.67	0.54
	16.0	264.25	-0.82	264.25	0.66
	12.1	262.11	-0.98	262.11	0.79
	8.7	260.19	-0.97	260.19	0.78
	5.6	258.46	-1.07	258.46	0.86
	2.7	256.89	-1.17	256.89	0.94
	0.1	255.44	-1.33	255.44	1.07
	-2.3	254.11	-1.41	254.11	1.13
	-4.5	252.87	-1.43	252.87	1.15
	-6.6	251.71	-1.52	251.71	1.22
	-8.5	250.63	-1.63	250.63	1.31
	-10.4	249.62	-1.73	249.62	1.39
	-12.2	248.58	-1.79	248.58	1.44
	-15.4	246.82	-1.93	246.82	1.55
	-18.3	245.23	-2.05	245.23	1.65
	-20.9	243.78	-2.22	243.78	1.78
	-23.3	242.44	-2.36	242.44	1.89
	-25.5	241.21	-2.58	241.21	2.07
	-27.5	240.07	-2.65	240.07	2.13
	-29.5	239.01	-2.75	239.01	2.21
	-31.3	238.00	-3.02	238.00	2.42
Measurements:twpskyrad60sC3.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
    Deviation(down_long_hemisp_shaded2_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
    Deviation(down_long_hemisp_shaded1_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)

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DQRID : D060110.3
Start DateStart TimeEnd DateEnd Time
11/13/2005231403/07/20060257
Subject:
TWP/SKYRAD/C3 - IRT damaged
DataStreams:twpskyrad20sC3.a0, twpskyrad60sC3.b1
Description:
The analog output of the IRT was damaged by a lightning strike. The problem was corrected 
by replacing the instrument with a spare. The damaged IRT was returned to the vendor for 
repair.
Measurements:twpskyrad60sC3.b1:
  • Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)
twpskyrad20sC3.a0:
  • Instantaneous Sky/Cloud Infrared(inst_sky_ir_signal)

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DQRID : D060217.1
Start DateStart TimeEnd DateEnd Time
02/16/2006033002/16/20060505
Subject:
TWP/SKYRAD/C3 - Tracker stopped
DataStreams:twpskyrad60sC3.b1
Description:
Solar Tracker stopped and had to be repowered
Measurements:twpskyrad60sC3.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
    Deviation(down_long_hemisp_shaded1_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_unshaded_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
    Deviation(down_long_hemisp_shaded2_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)

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DQRID : D060223.7
Start DateStart TimeEnd DateEnd Time
02/17/2006000003/10/20060411
Subject:
TWP/SKYRAD/C3 - Solar Tracker locking at solar noon
DataStreams:twpskyradC3.00, twpskyrad20sC3.a0, twpskyrad20sC3.a1, twpskyrad60sC3.b1
Description:
The Scitech solar tracker from SGP that was installed on 2005-12-01 after the previous 
tracker was damaged by lightning on 2005-11-14 has been hanging up every day at solar noon.  
In Feb, the sun moved from south to north and the Scitech tracker does not seem to be 
able to deal with this. During this period the operators power cycled the tracker between 
05:00Z and 10:00Z almost every day and data from around solar noon (03:30Z) until the 
power cycle are unusable for the measurements that use the tracker (NIP, B&W Diffuse, and 
shaded PIRs).
The problem was corrected when the Scitech tracker was replaced by a Brusag
tracker on 2006-03-10.
Measurements:twpskyradC3.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
twpskyrad60sC3.b1:
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
    Deviation(down_long_hemisp_shaded2_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
    Deviation(down_long_hemisp_shaded1_std)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
twpskyrad20sC3.a0:
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_resist)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
twpskyrad20sC3.a1:
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_resist)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_case_resist)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)

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DQRID : D060630.33
Start DateStart TimeEnd DateEnd Time
05/20/2004220012/21/20052136
Subject:
TWP/SKYRAD/C3 - Reprocess: Longwave Calibration error
DataStreams:twpskyrad60sC3.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.
Measurements:twpskyrad60sC3.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)

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