HFE/MPL/M1 - Frosting/Condensation

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

• range(range)
• Background signal standard deviation, cross-pol(background_signal_std_cross_pol)
• Attenuated backscatter, co-pol(signal_return_co_pol)
• Attenuated backscatter, cross-pol(signal_return_cross_pol)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)
• Laser output energy per pulse(energy_monitor)
• *(aqc_signal_return_co_pol)
• *(aqc_signal_return_cross_pol)
• base time(base_time)
• Background signal, co-pol(background_signal_co_pol)
• Polarization control voltage, co-pol(polarization_control_voltage_co_pol)
• Number of laser pulses summed during averaging interval(shots_per_sample)
• lat(lat)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Dead time correction flag(dead_time_corrected)
• Background signal, cross-pol(background_signal_cross_pol)
• Number of bins stored in data block(num_bins)
• 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)
• Laser Temperature(laser_temp)
• Number of samples used for cross-pol averages(nsamples_cross_pol_average)
• Telescope temperature(scope_temp)
• Detector Temperature(detector_temp)
• Polarization control voltage, cross-pol(polarization_control_voltage_cross_pol)
• Array of heights for the range gates(height)
• Time offset of tweaks from base_time(time_offset)
• Number of samples used for co-pol averages(nsamples_co_pol_average)
• Background signal standard deviation, co-pol(background_signal_std_co_pol)
• lon(lon)
• time(time)
• Dummy altitude for Zeb(alt)
• Preliminary cloud base height above ground level, co-pol(preliminary_cbh_co_pol)
• Number of detector channels(num_channels)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)

• Number of laser pulses summed during averaging interval(shots_per_sample)
• Number of detector channels(num_channels)
• Dead time correction flag(dead_time_corrected)
• range(range)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Attenuated backscatter, cross-pol(signal_return_cross_pol)
• Polarization control voltage, cross-pol(polarization_control_voltage_cross_pol)
• Detector Temperature(detector_temp)
• Dummy altitude for Zeb(alt)
• Background signal, cross-pol(background_signal_cross_pol)
• Background signal standard deviation, co-pol(background_signal_std_co_pol)
• Array of heights for the range gates(height)
• Preliminary cloud base height above ground level, co-pol(preliminary_cbh_co_pol)
• lon(lon)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• *(aqc_signal_return_co_pol)
• lat(lat)
• Polarization control voltage, co-pol(polarization_control_voltage_co_pol)
• Telescope temperature(scope_temp)
• Time offset of tweaks from base_time(time_offset)
• Background signal standard deviation, cross-pol(background_signal_std_cross_pol)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Background signal, co-pol(background_signal_co_pol)
• *(aqc_signal_return_cross_pol)
• Number of samples used for co-pol averages(nsamples_co_pol_average)
• Number of bins stored in data block(num_bins)
• Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)
• Number of samples used for cross-pol averages(nsamples_cross_pol_average)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)
• Laser output energy per pulse(energy_monitor)
• time(time)
• base time(base_time)
• Attenuated backscatter, co-pol(signal_return_co_pol)
• Laser Temperature(laser_temp)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)

• range(range)
• Number of detector channels(num_channels)
• Polarization control enabled flag(polarization_control)
• Number of bins stored in data block(num_bins)
• Telescope temperature(scope_temp)
• lon(lon)
• Detector Temperature(detector_temp)
• Number of laser pulses summed during averaging interval(shots_per_avg)
• Polarization control voltage setting(polarization_control_voltage)
• Dummy altitude for Zeb(alt)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Array of heights for the range gates(height)
• Background signal standard deviation(background_signal_std)
• lat(lat)
• base time(base_time)
• Laser output energy per pulse(energy_monitor)
• 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)
• Laser Temperature(laser_temp)
• Preliminary cloud base height(preliminary_cbh)
• Attenuated backscatter(signal_return)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• time(time)
• Time offset of tweaks from base_time(time_offset)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Background Signal(background_signal)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Dead time correction flag(dead_time_corrected)