Data Quality Reports for Session: 152011 User: liusy Completed: 08/07/2013


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D120215.3SGP/MERGESONDE/C1 - Reprocess: Precip data incorrectsgpmergesonde1maceC1.c1
D120215.4SGP/MERGESONDE/C1 - Reprocess: Precip data incorrectsgpmergesonde1maceC1.c1


DQRID : D120215.3
Start DateStart TimeEnd DateEnd Time
07/15/1996000012/31/19992359
Subject:
SGP/MERGESONDE/C1 - Reprocess: Precip data incorrect
DataStreams:sgpmergesonde1maceC1.c1
Description:
All precip values are incorrectly reported as -9999 during the period. The precipitation 
data from the co-located surface met station were not actually missing, but the MERGESONDE 
VAP was not able to properly ingest these data.  

This is actually a problem with the input datastream, as the sgp1smosE13.a0 datastream 
needs to be reprocessed and converted to the new sgpmetE13.b1 datastream.  The input 
datastream will have to be corrected before the MERGESONDE data can be reprocessed to correct 
this issue.
Measurements:sgpmergesonde1maceC1.c1:
  • Precipitation, total(precip)


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DQRID : D120215.4
Start DateStart TimeEnd DateEnd Time
01/01/2006000005/30/20122359
Subject:
SGP/MERGESONDE/C1 - Reprocess: Precip data incorrect
DataStreams:sgpmergesonde1maceC1.c1
Description:
All precip values are incorrectly reported during the period:  

From 20060101-20101231 all precip values are incorrectly reported as missing, or -9999.  

From 20110101-present all precip values are reported as 0 even though the qc_precip 
variable flags the data as missing, or -9999. 

The precipitation data from the co-located surface met station were not actually missing, 
but the MERGESONDE VAP did not properly ingest these data.  While the 0 precip values 
reported after 20110101 in MERGESONDE may be correct on days with no precip, they are not 
actually tied to the measurements from the co-located rain gauge and are due to a VAP 
software error.

To correct this issue, the MERGESONDE software will need to be corrected so the data can 
be reprocessed.  Because precip is a secondary variable in MERGESONDE, this issue is 
considered low priority and the VAP will not be reprocessed until a sufficient number of 
issues in the VAP have been identified.
Measurements:sgpmergesonde1maceC1.c1:
  • Precipitation, total(precip)


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