DQRID : D051219.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/27/2005193005/02/20060000Does not affect quality
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Subject:
NSA/CEIL/C1 - poor sensitivity at low altitude
DataStreams:nsaceilC1.b1
Description:
The ceilometer has an internal amplifier that it sets to low or high depending on 
prevalant conditions. Normally, the gain is automatically set high during clear skies. It appears 
that during these times, a slight degradation in either the transmitter or receiver is 
being amplified and produces a "ripple" at low altitudes in the backscatter plot. Cloud 
base height detection is not affected.
Suggestions: 
Measurements:nsaceilC1.b1:
  • receiver_sensitivity
  • backscatter
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