Data Quality Reports for Session: 105081 User: pwh@arm Completed: 04/09/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020426.6SGP/TSI/C1 - sampling rate changesgptsiskycoverC1.a1, sgptsiskycoverC1.b1
D030130.3SGP/TSI/C1 - Metadata Errors in NetCDF HeadersgptsiskycoverC1.a1, sgptsiskycoverC1.b1
D040526.1SGP/TSI/C1 - Metadata errorssgptsiskycoverC1.a1, sgptsiskycoverC1.b1


DQRID : D020426.6
Start DateStart TimeEnd DateEnd Time
07/02/2000003504/26/20020018
Subject:
SGP/TSI/C1 - sampling rate change
DataStreams:sgptsiskycoverC1.a1, sgptsiskycoverC1.b1
Description:
SGP TSI-880 sampling rate changed from 20-second to
30-second at 20020426.001900 UTC (20020425.1819 SGP
CF local time) per ECR-00226 and BCR-00491.

This change brings all ARM TSIs to the same operational
sampling rate.  Daily SGP TSI data volume will decrease
by about 1/3 due to this change.
Measurements:sgptsiskycoverC1.b1:
  • Time offset of tweaks from base_time(time_offset)
  • Pixel count: number total in sun circle(region.sun.count)
  • east longitude for all the input platforms.(lon)
  • Pixel count: number total indeterminant(count.unknown)
  • Sun altitude above horizon(solar.altitude)
  • Pixel count: box, outside mirror area(count.box)
  • Pixel count: number total opaque(count.opaque)
  • altitude above sea levelaltunits(alt)
  • Time offset from base_time(base_time)
  • Relative \'strength\' of direct sun(sun.strength)
  • Pixel count: number thin in horizon area(region.horizon.count.thin)
  • Pixel count: number thin in sun circle(region.sun.count.thin)
  • Pixel count: number below horizon in image(count.sub.horz)
  • Pixel count: number total in horizon area(region.horizon.count)
  • Pixel count: number opaque in horizon area(region.horizon.count.opaque)
  • Pixel count: camera and sun strip mask(count.mask)
  • Pixel count: number total in processed circle(count.sky)
  • Sunshine meter(sunny)
  • Pixel count: number total between horizon and processed circle(count.sub.proczen)
  • Percent opaque cloud(percent.opaque)
  • Pixel count: number total in zenith circle(region.zenith.count)
  • Pixel count: number thin in zenith circle(region.zenith.count.thin)
  • north latitude for all the input platforms.(lat)
  • Pixel count: number opaque in zenith circle(region.zenith.count.opaque)
  • Pixel count: number total thin(count.thin)
  • Solar azimuth angle(solar.azimuth)
  • Percentage thin cloud(percent.thin)
  • Pixel count: number opaque in sun circle(region.sun.count.opaque)
sgptsiskycoverC1.a1:
  • Pixel count: number total thin(count.thin)
  • Relative \'strength\' of direct sun(sun.strength)
  • Solar azimuth angle(solar.azimuth)
  • Pixel count: number total opaque(count.opaque)
  • Pixel count: number total in horizon area(region.horizon.count)
  • Pixel count: number total indeterminant(count.unknown)
  • Pixel count: box, outside mirror area(count.box)
  • Pixel count: number below horizon in image(count.sub.horz)
  • north latitude for all the input platforms.(lat)
  • Pixel count: number total in processed circle(count.sky)
  • Pixel count: number total in sun circle(region.sun.count)
  • Percentage thin cloud(percent.thin)
  • Sunshine meter(sunny)
  • Time offset from base_time(base_time)
  • Pixel count: number opaque in zenith circle(region.zenith.count.opaque)
  • Pixel count: number thin in horizon area(region.horizon.count.thin)
  • Pixel count: number opaque in sun circle(region.sun.count.opaque)
  • Pixel count: number total between horizon and processed circle(count.sub.proczen)
  • Pixel count: number total in zenith circle(region.zenith.count)
  • Pixel count: number thin in sun circle(region.sun.count.thin)
  • Pixel count: number thin in zenith circle(region.zenith.count.thin)
  • Time offset of tweaks from base_time(time_offset)
  • Sun altitude above horizon(solar.altitude)
  • altitude above sea levelaltunits(alt)
  • Pixel count: number opaque in horizon area(region.horizon.count.opaque)
  • east longitude for all the input platforms.(lon)
  • Percent opaque cloud(percent.opaque)
  • Pixel count: camera and sun strip mask(count.mask)

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DQRID : D030130.3
Start DateStart TimeEnd DateEnd Time
07/02/2000003501/21/20032359
Subject:
SGP/TSI/C1 - Metadata Errors in NetCDF Header
DataStreams:sgptsiskycoverC1.a1, sgptsiskycoverC1.b1
Description:
The value of "sample_int" reported in the netCDF header is
incorrect.  The correct sampling interval is 30 seconds.

The maximum values for the variable "sunny" is incorrect.  
It should be 1, not 100 as documented in the netCDF header. 
Users should disregard the "qc_sunny" flag during this
period of time and apply their own qc check if desired.

The minimum value for the variable "solar.altitude" is
incorrect. It should be -90, not 10 as documented in the
netCDF header.  Users should disregard the "qc_solar.altitude"
flag during this period of time and apply their own qc check
if desired.
Measurements:sgptsiskycoverC1.b1:
  • Time offset of tweaks from base_time(time_offset)
  • Sunshine meter(sunny)
  • Sun altitude above horizon(solar.altitude)
sgptsiskycoverC1.a1:
  • Time offset of tweaks from base_time(time_offset)

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DQRID : D040526.1
Start DateStart TimeEnd DateEnd Time
07/02/2000003505/05/20032359
Subject:
SGP/TSI/C1 - Metadata errors
DataStreams:sgptsiskycoverC1.a1, sgptsiskycoverC1.b1
Description:
The latitude, longitude and altitude of the Total Sky Imager 
(TSI) were incorrectly entered into the ARM database.  The 
correct location of the SGP.C1 TSI is:
   Lat: 36.606N
   Lon: 97.485W
   Alt:    316m
Measurements:sgptsiskycoverC1.b1:
  • altitude above sea levelaltunits(alt)
  • north latitude for all the input platforms.(lat)
  • east longitude for all the input platforms.(lon)
sgptsiskycoverC1.a1:
  • altitude above sea levelaltunits(alt)
  • east longitude for all the input platforms.(lon)
  • north latitude for all the input platforms.(lat)

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