DQRID : D070503.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/18/2007163007/11/20070550Suspect
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Subject:
TWP/CEIL/C3 - Reduced sensitivity to high clouds
DataStreams:twpceilC3.b1
Description:
The instrument had reduced sensitivity to high clouds.

The instrument produced a significant number of optical cross-talk warnings and displayed 
a reduced capacity to detect high clouds. The window was cleaned and the instrument was 
power-cycled but with no improvement. Diagnostics indicated the problem was with the 
compensation fiber cable. 

The problem was corrected by replacing this standard-window instrument (that was tilted at 
16 degrees) with a tropics unit that became available.
Suggestions: 
Measurements:twpceilC3.b1:
  • alt_highest_signal
  • third_cbh
  • vertical_visibility
  • second_cbh
  • receiver_sensitivity
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