DQRID : D090302.1
Start DateStart TimeEnd DateEnd Time
02/28/2009181302/28/20092125
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Subject:
NSA/TSI/C1 - Mirror frozen
DataStreams:nsatsicldmaskC1.a1, nsatsiskyimageC1.a1, nsatsiskycoverC1.b1
Description:
The mirror was not rotating so the shadowband was not masking the sun. This appears to 
have been caused by snow that was melted by the mirror heater and then re-frozen by high, 
cold winds.
Suggestions: 
Measurements:nsatsiskyimageC1.a1:
  • null(JPEG data stream - documentation not yet available)
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nsatsiskycoverC1.b1:
  • Percent opaque cloud(percent.opaque)
  • Pixel count: number thin in horizon area(region.horizon.count.thin)
  • Pixel count: number opaque in horizon area(region.horizon.count.opaque)
  • Pixel count: number total opaque(count.opaque)
  • Pixel count: number opaque in sun circle(region.sun.count.opaque)
  • Pixel count: number total in zenith circle(region.zenith.count)
  • Pixel count: number total in sun circle(region.sun.count)
  • Pixel count: number thin in sun circle(region.sun.count.thin)
  • Pixel count: number total in horizon area(region.horizon.count)
  • Pixel count: number total thin(count.thin)
  • Pixel count: number thin in zenith circle(region.zenith.count.thin)
  • Pixel count: number opaque in zenith circle(region.zenith.count.opaque)
  • Percentage thin cloud(percent.thin)
  • Pixel count: number total in processed circle(count.sky)
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nsatsicldmaskC1.a1:
  • PNG data stream - documentation not supported(png)
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