Data Quality Reports for Session: 179460 User: shig1 Completed: 09/07/2016

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D000119.1SGP/GPS/X1 - GPS antenna upgradessgp30wpdngpsX1.c1Does not affect quality
D000720.1SGP/GPS/X1 - Change in Algorithmsgp30wpdngpsX1.c1Does not affect quality
D060915.6SGP/WPDN/X1 - Reprocessed: WPDN GPS errors in station infosgp30wpdngpsX1.c1Does not affect quality
D070921.1SGP/WPDN/X1 - Missing datasgp30wpdngpsX1.c1Missing


DQRID : D000119.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/01/1996000012/26/19992359Does not affect quality
Subject:
SGP/GPS/X1 - GPS antenna upgrades
DataStreams:sgp30wpdngpsX1.c1
Description:
Seth Gutman from NOAA/FSL informed me that the GPS antennas at three of
the sites in their network were replaced with newer models.  These newer
antennas should result in better retrievals of PWV from the GPS.  These
sites and the dates the antennas where changed are:

	Lamont  	12/23/1999
	Purcell		12/26/1999
	Plattville	12/16/1999
Measurements:sgp30wpdngpsX1.c1:
  • base_time
  • timeObs
  • North latitude(lat)
  • wetDelay
  • staLongNam
  • Temperature at the ground station(temperature)
  • staNam
  • totalDelay
  • time_offset
  • East longitude(lon)
  • Altitude above mean sea level(alt)
  • dryDelay
  • formalError
  • Model surface pressure for the station(pressure)
  • Water vapor, total along line-of-sight path, retrieved from GPS(waterVapor)

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DQRID : D000720.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/01/1996000006/27/20002359Does not affect quality
Subject:
SGP/GPS/X1 - Change in Algorithm
DataStreams:sgp30wpdngpsX1.c1
Description:
The algorithm for computing water vapor changed after this end date.
The files generated after this date have a global attribute indicating
the change. The new algorithm is to be documented in a NOAA Technical
Memo.
Measurements:sgp30wpdngpsX1.c1:
  • Water vapor, total along line-of-sight path, retrieved from GPS(waterVapor)

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DQRID : D060915.6
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/18/2005000008/27/20062359Does not affect quality
Subject:
SGP/WPDN/X1 - Reprocessed: WPDN GPS errors in station info
DataStreams:sgp30wpdngpsX1.c1
Description:
Starting 10/18/05, there were problems with the station information in the
sgp30wpdngpsX1.c1 data.   There were extra stations listed with shortened station 
abbreviations and shortened long names. The data itself was okay, there were just extra stations 
listed.
   
The data for 10/18/05 - 08/27/06 were reprocessed and archived in October, 2006.
Measurements:sgp30wpdngpsX1.c1:
  • base_time
  • timeObs
  • North latitude(lat)
  • wetDelay
  • staLongNam
  • Temperature at the ground station(temperature)
  • staNam
  • totalDelay
  • time_offset
  • East longitude(lon)
  • Altitude above mean sea level(alt)
  • sigma
  • dryDelay
  • formalError
  • Model surface pressure for the station(pressure)
  • Water vapor, total along line-of-sight path, retrieved from GPS(waterVapor)

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DQRID : D070921.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/11/2007000009/11/20072359Missing
07/31/2007000008/01/20072359Missing
Subject:
SGP/WPDN/X1 - Missing data
DataStreams:sgp30wpdngpsX1.c1
Description:
Per Kirk Holub at NOAA, data are not available for these two time periods.
Measurements:sgp30wpdngpsX1.c1:
  • base_time
  • timeObs
  • North latitude(lat)
  • wetDelay
  • staLongNam
  • Temperature at the ground station(temperature)
  • staNam
  • totalDelay
  • time_offset
  • East longitude(lon)
  • Altitude above mean sea level(alt)
  • sigma
  • dryDelay
  • formalError
  • Model surface pressure for the station(pressure)
  • Water vapor, total along line-of-sight path, retrieved from GPS(waterVapor)

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END OF DATA