LAPS 3D Water Vapor Specific Humidity Analysis

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LAPS 3-D Water Vapor (Specific Humidity) Analysis

• Interpolates background field from synoptic-scale
  model forecast
• QCs against LAPS temperature field (eliminates
  possible supersaturation)
• Assimilates RAOB data
• Assimilates boundary layer moisture from LAPS Sfc
  Td analysis
• Variationally adjusts profile at two levels to
  agree with GOES sounder radiances (channels 6, 7,
  8, 10, 11, 12, 16). The levels are 700-500 hPa,
  and above 500. A 3-level version is under
  construction that will also simultaneously adjust
  to GPS total and GOES derived data precipitable
  water.
• Saturates where there are analyzed clouds
• Performs final QC against supersaturation