DQRID : D110412.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/07/2010000006/29/20102359Incorrect
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Subject:
SGP/IRT/E21 - TimeCheck Error
DataStreams:sgpirtE21.b1
Description:
The EF data system lost communication with the GPS likely starting on or around June 7th; 
the max time offset for E21 was -5.04 sec. Then it began increasing steadily:

Jun 8  Offset:	  -267.449039
Jun 9  Offset:	  -541.038624
Jun 10 Offset:	  -814.469141
Jun 11 Offset:	  -1076.862114
Jun 12 Offset:	  -1350.330223
Jun 13 Offset:	  -1623.639335
Jun 14 Offset:	  -1897.047754
Jun 15 Offset:	  -2170.552312
Jun 16 Offset:	  -2422.130746
Jun 17 Offset:	  -2684.607495
Jun 18 - Jun 22 (unknown)
Jun 23 Offset:	  -4204.730579

If the system clock drifts the irt_comm program will get the same incorrect time. IRT 
temperature data will be correct but the corresponding time stamp cannot be accurately known 
or simply corrected for.
Suggestions: 
Data time stamp cannot be considered accurate and hence users are advised to 

disregard this data.
Measurements:sgpirtE21.b1:
  • time
  • base_time
  • time_offset
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