Data Quality Reports for Session: 100833 User: mccord Completed: 08/01/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D021211.11NSA/GNDRAD/C1 - Noisy PIR Datansagndrad60sC1.a1
D990924.1NSA/GNDRAD/C1 - IRT insufficiently heatednsagndrad60sC1.a1


DQRID : D021211.11
Start DateStart TimeEnd DateEnd Time
09/01/1998000002/28/19992359
Subject:
NSA/GNDRAD/C1 - Noisy PIR Data
DataStreams:nsagndrad60sC1.a1
Description:
During the period referenced, the ground PIR was noisy in comparison to the sky PIR data.  
At the end of November, the noise increased to roughly 10 W/m2 from peak to peak.  After 
12/23/98, the noise decreased in amplitude but still had noisy patterns.  

On 01/17-18/99, there was an increase again in the noise level (4 GMT 01/17 - 5 GMT 
01/18). During this period the gndrad IRT data also exhibited noise patterns (the IRT was not 
operational).

In February, the instrument exhibited large noise variations again.  On 02/16, a wiring 
problem was corrected and the noise dropped back to 1-5 W/m2.  However, the noise levels 
began to increase again.
Measurements:nsagndrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded mean(pir1_mean)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded minimum(pir1_min)

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DQRID : D990924.1
Start DateStart TimeEnd DateEnd Time
04/06/1998215612/22/20002020
Subject:
NSA/GNDRAD/C1 - IRT insufficiently heated
DataStreams:nsagndrad60sC1.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:nsagndrad60sC1.a1:
  • IRT1 standard deviation(irt1_sd)
  • IRT1 mean(irt1_mean)
  • IRT1 maximum(irt1_max)
  • IRT1 minimum(irt1_min)

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