DQRID : D050624.6
Start DateStart TimeEnd DateEnd Time
06/16/2005000006/27/20052359
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Subject:
NSA/VCEIL/C1 - Reprocess: Intermittent data and clock drift
DataStreams:nsavceil25kC1.b1
Description:
The available processed data for the NSA.C1 VCEIL for the time period indicated are 
incomplete.  The raw data is largely complete but pre-processing is required before these data 
can be reprocessed to produce a complete netcdf data set.

While awaiting the reprocessed data set, the intermittent data are available from the ARM 
Archive.  Users should be aware that the data are additionally compromised by a clock 
drift of at least 10 minutes, though this likely has little affect on cloud detection 
results.  The clock drift will not be addressed by the reprocessing.

Note also, that the clock drift was corrected at the end of the DQR period, but it may 
have existed before the beginning of the DQR period.

The data for this period should be used with caution.
Suggestions: 
Measurements:nsavceil25kC1.b1:
  • Warning, alarm, and internal status information(status_string)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • North Latitude(lat)
  • Sum of detected and normalized backscatter(sum_backscatter)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • Window contamination(window_contamination)
  • lon(lon)
  • Vertical visibility(vertical_visibility)
  • Distance to the center of the corresponding range bin(range)
  • Flag indicating aeri retrieval status(status_flag)
  • 6 character string describing instrument measurement parameters(measurement_parameters)
  • Detection status.(detection_status)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • -180.0 - +180.0(alt)
  • Lowest cloud base height detected(first_cbh)
  • Time offset from base_time(time_offset)
  • base time in epoch(base_time)
  • Third cloud base height(third_cbh)
  • Raw data filename(filename)
  • Second lowest cloud base height(second_cbh)
  • Laser temperature(laser_temperature)
  • Altitude of highest signal(alt_highest_signal)
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