DQRID : D100514.1
Start DateStart TimeEnd DateEnd Time
04/16/2010220204/23/20102241
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Subject:
SGP/VCEIL/C1 - Range normalization
DataStreams:sgpvceil25kC1.b1
Description:
The range gate data were not normalized during this period because, when the CL31 was 
first deployed, I was uncertain about this parameter and returned it to its default setting 
of "off". Range gate normalization was enabled after receiving the following from Vaisala:

''We do recommend to keep this 'profile noise_h2' setting on. If 'profile noise_h2' is 
off, then range correction of the signal would freeze at 2400 m, unless the algorithm has 
detected a cloud region. This had been designed to make profiles in CL-VIEW look less noisy 
and to emphasize the presence of clouds.''
Suggestions: 
Measurements:sgpvceil25kC1.b1:
  • Vertical visibility(vertical_visibility)
  • Lowest cloud base height detected(first_cbh)
  • Second lowest cloud base height(second_cbh)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Altitude of highest signal(alt_highest_signal)
  • Third cloud base height(third_cbh)
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