Data Quality Reports for Session: 100393 User: wardrich Completed: 07/09/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060420.5NIM/MWRP/M1 - IRT Sensor CalibrationnimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00
D060602.2NIM/MWRP/M1 - Reprocess: IRT configuration setting errornimmwrpM1.b1


DQRID : D060420.5
Start DateStart TimeEnd DateEnd Time
01/15/2006000006/03/20060000
Subject:
NIM/MWRP/M1 - IRT Sensor Calibration
DataStreams:nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00
Description:
Discrepancies between the MWRP and Skyrad IRT were observed in January. The MWRP IRT 
readings were constantly higher than those of the skyrad IRT. Some changes were introduced to 
the MWRP IRT to address the problem (see DQR D060602.2). On May 3, the IRT mirror was 
replaced. After the change in the mirror, the MWRP IRT readings became about 5-8 C lower. On 
June 3 the agreement between MWRP and Skyrad IRT became satisfactory (2-5 degree C 
difference).

It is hard to numerically quantify the difference in the IRT readings caused by the change 
in the mirror. We can only warn the user that between January 1 and June 3 the MWRP 
readings are 8 to 15 degree higher than the skyrad IRT.
Measurements:nimmwrprawM1.00:
  • Raw data stream - documentation not supported(raw)

nimmwrpM1.b1:
  • Zenith-pointing infrared temperature at 10um(infraredTemperature)

nimmwrpM1.00:
  • Raw data stream - documentation not supported(raw)


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DQRID : D060602.2
Start DateStart TimeEnd DateEnd Time
01/15/2006000004/21/20060000
Subject:
NIM/MWRP/M1 - Reprocess: IRT configuration setting error
DataStreams:nimmwrpM1.b1
Description:
The infrared thermometer settings (IRT) were not configured as specified by the 
manufacturer. The analog output was set to a range of -60 to +50 C (0-10V) instead of -50 to +50 C 
(0-10V). The settings were changed on April 20. The IR temperatures should be slightly 
smaller than reported.

The following formula can be used to convert the wrong readings to the new:
    T_new = -60 + 1.1(T_old+50) 
where all temperatures are in degree C. For example, if T_old = 30 C, T_new = 28 C.
Measurements:nimmwrpM1.b1:
  • Zenith-pointing infrared temperature at 10um(infraredTemperature)


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