DQRID : D090212.4
Start DateStart TimeEnd DateEnd Time
05/18/2008000012/28/20080000
more
Subject:
HFE/MPL/M1 - Frosting/Condensation
DataStreams:hfemplpolavgM1.s1, hfemplpolavgM1.c1, hfemplpolM1.b1
Description:
On various days during the China deployment, condensation accumulated on the view port 
window of the MPL and compromised its capability to detect clouds.  This problem most often 
occurred during nighttime hours from May through early September.  

During the listed times, cloud retrievals and aerosol profiles should be considered 
doubtful or in error.

The dates/times of occurrence are:
16:00-23:59 GMT on 05/18
17:00-22:00 GMT on 05/23
20:00-22:00 GMT on 05/25
15:00-23:59 GMT on 06/07
17:00-23:59 GMT on 06/08
15:00-23:00 GMT on 06/09
14:00-18:00 GMT on 06/18
18:00-21:00 GMT on 06/21
14:00-16:00 GMT on 06/23
16:00-21:00 GMT on 06/27
17:00-20:00 GMT on 06/28
      22:00 GMT on 06/29
19:00-23:00 GMT on 06/30
13:30-22:30 GMT on 07/02
16:00-17:30 GMT on 07/03 
20:30-22:00 GMT on 07/03
21:30-22:30 GMT on 07/05
13:00-22:00 GMT on 07/06
17:00-18:00 GMT on 07/07
21:00-22:30 GMT on 07/07
16:00-23:59 GMT on 07/10
11:00-23:00 GMT on 07/11
18:00-23:00 GMT on 07/12
15:00-16:00 GMT on 07/13
18:00-23:59 GMT on 07/14
18:00-21:00 GMT on 07/15
17:30-23:00 GMT on 07/16
17:00-23:00 GMT on 07/17
13:00-23:30 GMT on 07/20
18:00-23:00 GMT on 07/24
21:00-23:00 GMT on 07/25
21:00-22:30 GMT on 07/27
12:00-23:59 GMT on 08/02
16:00-21:30 GMT on 08/03
16:00-23:00 GMT on 08/04
14:00-22:30 GMT on 08/05
19:00-23:00 GMT on 08/07
19:00-21:30 GMT on 08/08
15:00-23:30 GMT on 08/10
17:30-23:30 GMT on 08/12
14:00-15:00 GMT on 08/14
16:30-22:30 GMT on 08/14
21:30-22:30 GMT on 08/17
12:00-23:59 GMT on 08/18
12:00-13:30 GMT on 08/19
20:00-23:30 GMT on 08/19
15:00-23:59 GMT on 08/20
11:00-23:59 GMT on 08/22
11:00-23:30 GMT on 08/23
12:00-23:30 GMT on 08/25
13:00-23:30 GMT on 08/26
16:30-23:59 GMT on 08/27
17:00-23:00 GMT on 08/31
15:00-23:59 GMT on 09/01
15:00-20:00 GMT on 09/02
19:30-23:59 GMT on 09/05
16:30-22:30 GMT on 09/09
19:30-23:59 GMT on 09/12
20:30-23:59 GMT on 09/15
14:00-16:30 GMT on 09/16
19:00-23:59 GMT on 09/16
20:30-23:59 GMT on 10/29
22:00-23:59 GMT on 11/01
20:00-23:59 GMT on 11/23
00:00-02:00 GMT on 11/24
Suggestions: 
Measurements:hfemplpolavgM1.s1:
  • Preliminary cloud base height above ground level, co-pol(preliminary_cbh_co_pol)
  • Time offset from base_time(time_offset)
  • Background signal, cross pol data(background_signal_cross_pol)
  • Number of bins stored in data block(num_bins)
  • Number of laser pulses summed during averaging interval(shots_per_sample)
  • Distance to the center of the corresponding range bin(range)
  • Maximum altitude retrieved from multichannel scalar card.(max_altitude)
  • Background signal standard deviation, cross-pol(background_signal_std_cross_pol)
  • Telescope temperature(scope_temp)
  • Detector Temperature(detector_temp)
  • Background signal standard deviation, copol data(background_signal_std_co_pol)
  • Attenuated backscatter, cross pol(signal_return_cross_pol)
  • Number of samples used for co-pol averages(nsamples_co_pol_average)
  • Background signal, co-pol(background_signal_co_pol)
  • -180.0 - +180.0(alt)
  • Attenuated backscatter, co-pol(signal_return_co_pol)
  • North Latitude(lat)
  • base time in epoch(base_time)
  • Laser Temperature(laser_temp)
  • (aqc_signal_return_cross_pol)
  • time_in_seconds_since_volume_start(time)
  • Subtract from range_bins to yield range(range_offset)
  • (aqc_signal_return_co_pol)
  • Number of detector channels(num_channels)
  • Distance from leading edge of first range bin to the center of each bin .(range_bins)
  • lon(lon)
  • Dead time correction flag(dead_time_corrected)
  • Width of range-bins calculated from range_bin_time(range_bin_width)
  • Number of samples used for cross-pol averages(nsamples_cross_pol_average)
  • Polarization control voltage, co-pol(polarization_control_voltage_co_pol)
  • Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
  • Height(height)
  • Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)
  • Laser output energy per pulse(energy_monitor)
  • Polarization control voltage, cross-pol(polarization_control_voltage_cross_pol)
more
hfemplpolavgM1.c1:
  • Number of samples used for co-pol averages(nsamples_co_pol_average)
  • Number of samples used for cross-pol averages(nsamples_cross_pol_average)
  • Distance to the center of the corresponding range bin(range)
  • Preliminary cloud base height above ground level, co-pol(preliminary_cbh_co_pol)
  • Height(height)
  • Telescope temperature(scope_temp)
  • Background signal, cross pol data(background_signal_cross_pol)
  • Laser output energy per pulse(energy_monitor)
  • Detector Temperature(detector_temp)
  • Distance from leading edge of first range bin to the center of each bin .(range_bins)
  • Background signal, co-pol(background_signal_co_pol)
  • (aqc_signal_return_cross_pol)
  • Number of bins stored in data block(num_bins)
  • Maximum altitude retrieved from multichannel scalar card.(max_altitude)
  • Number of laser pulses summed during averaging interval(shots_per_sample)
  • Subtract from range_bins to yield range(range_offset)
  • Attenuated backscatter, co-pol(signal_return_co_pol)
  • Laser Temperature(laser_temp)
  • base time in epoch(base_time)
  • -180.0 - +180.0(alt)
  • Background signal standard deviation, cross-pol(background_signal_std_cross_pol)
  • time_in_seconds_since_volume_start(time)
  • North Latitude(lat)
  • Number of detector channels(num_channels)
  • Attenuated backscatter, cross pol(signal_return_cross_pol)
  • (aqc_signal_return_co_pol)
  • Polarization control voltage, cross-pol(polarization_control_voltage_cross_pol)
  • Dead time correction flag(dead_time_corrected)
  • Polarization control voltage, co-pol(polarization_control_voltage_co_pol)
  • Background signal standard deviation, copol data(background_signal_std_co_pol)
  • lon(lon)
  • Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)
  • Width of range-bins calculated from range_bin_time(range_bin_width)
  • Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
  • Time offset from base_time(time_offset)
more
hfemplpolM1.b1:
  • Detector Temperature(detector_temp)
  • Height(height)
  • Time offset from base_time(time_offset)
  • Preliminary cloud base height above ground level(preliminary_cbh)
  • base time in epoch(base_time)
  • lon(lon)
  • Dead time correction flag(dead_time_corrected)
  • Distance from leading edge of first range bin to the center of each bin .(range_bins)
  • Maximum altitude retrieved from multichannel scalar card.(max_altitude)
  • Attenuated backscatter(signal_return)
  • Polarization control enabled flag(polarization_control)
  • Background signal standard deviation(background_signal_std)
  • time_in_seconds_since_volume_start(time)
  • -180.0 - +180.0(alt)
  • North Latitude(lat)
  • Number of laser pulses summed during averaging interval(shots_per_avg)
  • Laser Temperature(laser_temp)
  • Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
  • Number of bins stored in data block(num_bins)
  • Number of detector channels(num_channels)
  • Telescope temperature(scope_temp)
  • Width of range-bins calculated from range_bin_time(range_bin_width)
  • Distance to the center of the corresponding range bin(range)
  • Subtract from range_bins to yield range(range_offset)
  • Laser output energy per pulse(energy_monitor)
  • Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
  • Polarization control voltage setting(polarization_control_voltage)
  • Background signal(background_signal)
more

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