DQRID : D961117.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/02/1996192507/02/19962315Incorrect
07/07/1996204507/08/19960030Incorrect
07/03/1996193507/03/19962115Incorrect
07/05/1996191507/06/19960200Incorrect
07/06/1996190007/06/19962240Incorrect
07/21/1996194507/22/19960200Incorrect
07/04/1996204007/05/19960030Incorrect
more
Subject:
SGP/MWR/B4 - Loss of thermal stabilization
DataStreams:sgpmwrlosB4.a1, sgpmwrlosB4.00, sgpmwrlosB4.b1, sgpmwrlosB4.a0, sgpmwrB4.00
Description:
As described in DQR D040819.4 during the month of August in 1994 and 1995 the microwave 
radiometers would lose thermal stabilization on very hot sunny days when the temperature in 
the radiometer enclosure rose above the set point for thermal stabilization (~50 degC). 
The temperatures in July 1996 were hotter than in previous years and the loss of 
stabilization problem occurred before the instrument mentor could make the needed adjustment.

The purpose of this DQR is to identify the time periods for which this problem occurred.  
More specific information about the problem, including how the problem is detected and 
its effect on the reported values of integrated water vapor and integrated cloud liquid 
water are provided in DQR D040819.4.

When the thermal stabilization is lost, the reported precipitable water vapor increases 
and the liquid water path decreases (and becomes SIGNIFICANTLY NEGATIVE (-0.1 mm) on clear 
sky days). The RMS noise level in the data also increases sharply. THESE ANOMALOUS VALUES 
HAVE BEEN INCLUDED IN THE 5-MINUTE AVERAGES.
Suggestions: 
Do not use data
Measurements:sgpmwrlosB4.00:
  • Raw data stream - documentation not supported
more
sgpmwrlosB4.a1:
  • 23tbsky
  • vap
  • 31tbsky
  • liq
more
sgpmwrB4.00:
  • Raw data stream - documentation not supported
more
sgpmwrlosB4.b1:
  • vap
  • liq
  • tbsky31
  • tbsky23
more
sgpmwrlosB4.a0:
  • 23tbsky
  • liq
  • 31tbsky
  • vap
more

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