Subject: | TWP/MPL/C2 - Laser emission accidentally turned off |
DataStreams: | twpmplcbh1scottC2.c0, twpmplnor1campC2.c1, twpmplcmask1clothC2.c1, twpmplsmask1clothC2.c1, twpmplC2.00, twpmplcbh1scottC2.c1, twpmplC2.a1
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Description: | Shortly after 00:00 GMT on 11/11/00, the MPL Energy Monitor value dropped
abruptly to zero. At about 22:00 GMT on 11/13/00, the remote handset for
the laser diode supply was used to turn the laser back on. |
Suggestions: | Do not use data from this time period |
Measurements: | twpmplsmask1clothC2.c1: - Range Heights (center of radar sample volume)(Heights)
- base time in epoch(base_time)
- MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth)
- Time offset from base_time(time_offset)
more
twpmplnor1campC2.c1: - Cloud base height (for first cloud above height threshold)(cloud_base_height)
- Height(height)
- Laser output energy per pulse(energy_monitor)
- Instrument Temperature(instrument_temp)
- Altitude of cloud top used in retrieval(cloud_top_height)
- Number of lidar pulses summed(shots_summed)
- Relative random error in backscatter profiles(random_error)
- Background signal(background_signal)
- Laser Temperature(laser_temp)
- Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
- Cloud mask(cloud_mask_2)
- Cloud mask(cloud_mask_1)
- Time offset from base_time(time_offset)
- -180.0 - +180.0(alt)
- Detector Temperature(detector_temp)
- The update time of the historical baseline used for the cloud boundary
determination of this sample(baseline_update_time) - North Latitude(lat)
- lon(lon)
- base time in epoch(base_time)
- Aerosol volume backscattering coefficient at 355 nm(backscatter)
- Flag indicating whether the beam was extinguished at indicated cloud top(cloud_top_attenuation_flag)
more
twpmplC2.a1: - Laser output energy per pulse(energy_monitor)
- Time offset from base_time(time_offset)
- Laser Temperature(laser_temp)
- Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
- Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
- Voltage level which operates the thermistor(voltage_10)
- Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
- Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
- Voltage level which operates the energy monitor(voltage_15)
- Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
- Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
- Number of lidar pulses summed(shots_summed)
- Height(height)
- Angle of orientation with respect to true geographic north(transceiver_azimuth_angle)
- value represents earliest applicable date as yyyymmdd(property)
- lon(lon)
- Number of laser pulses summed during measurement interval(shots_sum)
- base time in epoch(base_time)
- Angle of inclination with respect to horizontal(transceiver_altitude_angle)
- Detector Temperature(detector_temp)
- Distance to the center of the corresponding range bin(range)
- Preliminary cloud base height above ground level(preliminary_cbh)
- Instrument Temperature(instrument_temp)
- -180.0 - +180.0(alt)
- Repetition rate, or Trigger Frequency of the laser(trigger_freq)
- Aerosol volume backscattering coefficient at 355 nm(backscatter)
- Deadtime correction factor(deadtime_correction)
- Distance from leading edge of first range bin to the center of each bin .(range_bins)
- North Latitude(lat)
- Background signal(background_signal)
- Subtract from range_bins to yield range(range_offset)
- Maximum altitude retrieved from multichannel scalar card.(max_altitude)
- Width of range-bins calculated from range_bin_time(range_bin_width)
- Filter Temperature(filter_temp)
- time_in_seconds_since_volume_start(time)
- Voltage level which operates the A/D card and the detector(voltage_05)
more
twpmplcbh1scottC2.c1: - lon(lon)
- Average cloud base height used in the retrieval(cbh)
- base time in epoch(base_time)
- Time offset from base_time(time_offset)
- North Latitude(lat)
- -180.0 - +180.0(alt)
more
twpmplC2.00: - (Raw data stream - documentation not supported)
more
twpmplcmask1clothC2.c1: - MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)
- Time offset from base_time(time_offset)
- Range Heights (center of radar sample volume)(Heights)
- base time in epoch(base_time)
more
twpmplcbh1scottC2.c0: - (Raw data stream - documentation not supported)
more
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