DQRs for Session: 131993 User:dinghuihaoCompleted: 12-04-2010

Data Quality Reports for Session: 131993 User: dinghuihao Completed: 12/04/2010

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D040706.4	SGP/MPL/C1 - Reduced detection sensitivity	sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1
D050421.14	SGP/MPL/C1 - Sensor Calibration	sgpmplC1.00, sgpmplC1.a1
D050914.3	SGP/MPL/C1 - Instrument offline	sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1
D060621.2	TWP/MPL/C2 - Optical throughput unacceptable	twpmplC2.00, twpmplC2.a1
D060621.3	TWP/MPL/C2 - Detector on instrument failed.	twpmplC2.00, twpmplC2.a1
D060621.4	TWP/MPL/C2 - Missing data	twpmplC2.00, twpmplC2.a1

DQRID : D040706.4

Start Date	Start Time	End Date	End Time
07/01/2004	1500	07/07/2004	0350
07/23/2004	2200	09/10/2004	2100

Subject:	SGP/MPL/C1 - Reduced detection sensitivity
DataStreams:	sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1
Description:	During the time periods indicated, the laser power supply was low. This resulted in compromised detection sensitivity, particularly for thin clouds and/or during daylight hours. That is, some clouds may not have been identified. The low laser power would not have resulted in false positives.
Measurements:	sgpmplC1.a1: Preliminary cloud base height(preliminary_cbh) sgpmplnor1campC1.c1: Cloud base height(cloud_base_height) cloud_mask_2 cloud_mask_1 Cloud top height(cloud_top_height) cloud_top_attenuation_flag sgpmplsmask1clothC1.c1: MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth) sgpmplcmask1clothC1.c1: MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)

Back To Table of Contents

DQRID : D050421.14

Start Date	Start Time	End Date	End Time
11/03/2004	0000	02/23/2005	2300

Subject:	SGP/MPL/C1 - Sensor Calibration
DataStreams:	sgpmplC1.00, sgpmplC1.a1
Description:	The Energy Monitor records the value of the laser energy. During the time in question, the laser energy exceed the maximum value in the calibration table for the energy monitor. In other words, the value is pegged. This condition does not affect the backscatter signal. But it will prevent users from normalizing the backscatter signal to the laser output.
Measurements:	sgpmplC1.a1: energy_monitor sgpmplC1.00: Raw data stream - documentation not supported

Back To Table of Contents

DQRID : D050914.3

Start Date	Start Time	End Date	End Time
07/07/2004	0350	07/23/2004	2150

Subject:	SGP/MPL/C1 - Instrument offline
DataStreams:	sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1
Description:	Instrument was taken offline due to a failure of the laser power supply. Data are missing and unrecoverable.
Measurements:	sgpmplC1.a1: lon Pressure, associated geometric height, at altitude, NGM model output(height) range_offset laser_scalar_sync_offset Preliminary cloud base height(preliminary_cbh) filter_temp trigger_freq time energy_monitor transceiver_altitude_angle voltage_15 voltage_10 pulse_rep Backscatter(backscatter) laser_sync_offset range_bin_time laser_temp time_offset base_time scalar_sync_offset instrument_temp total_counts background_signal lat range shots_sum voltage_05 max_altitude range_bins detector_temp shots_summed deadtime_correction alt property range_bin_width transceiver_azimuth_angle sgpmplnor1campC1.c1: background_signal energy_monitor alt Cloud base height(cloud_base_height) cloud_top_attenuation_flag Backscatter(backscatter) lon baseline_update_time detector_temp cloud_mask_2 random_error cloud_mask_1 Cloud top height(cloud_top_height) pulse_rep time_offset shots_summed lat instrument_temp base_time Pressure, associated geometric height, at altitude, NGM model output(height) laser_temp sgpmplsmask1clothC1.c1: time_offset MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth) Heights base_time sgpmplcmask1clothC1.c1: time_offset base_time Heights MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)

Back To Table of Contents

DQRID : D060621.2

Start Date	Start Time	End Date	End Time
02/01/2003	0000	11/12/2004	1900

Subject:	TWP/MPL/C2 - Optical throughput unacceptable
DataStreams:	twpmplC2.00, twpmplC2.a1
Description:	The optical throughput of the MPL at Nauru is below an acceptable level. Despite an extended stay to address the problem in Feb 2003, the problem was unresolved. An additional repair was attempted in July 2003 with no significant success. Several optical components were replaced and the system was repeatedly re-aligned. The system appears to have been properly collimated as the shape of the signal is appropriate for both near and far range. The magnitude of the signal was simply too low. This signal decrease was apparent in ambient background values as well as from atmospheric signal, so the impact on data quality was not as severe as might otherwise be the case. The MPL was still capable of detecting high altitude cirrus (day and night) but the sensitivity was reduced.
Measurements:	twpmplC2.a1: detector_counts twpmplC2.00: Raw data stream - documentation not supported

Back To Table of Contents

DQRID : D060621.3

Start Date	Start Time	End Date	End Time
11/12/2004	1900	12/14/2004	2330

Subject:	TWP/MPL/C2 - Detector on instrument failed.
DataStreams:	twpmplC2.00, twpmplC2.a1
Description:	The detector on the MPL failed. The result are zeros for the detector counts data.
Measurements:	twpmplC2.a1: detector_counts twpmplC2.00: Raw data stream - documentation not supported

Back To Table of Contents

DQRID : D060621.4

Start Date	Start Time	End Date	End Time
12/14/2004	2330	02/01/2005	2130

Subject:	TWP/MPL/C2 - Missing data
DataStreams:	twpmplC2.00, twpmplC2.a1
Description:	The MPL was turned off due to a dead detector.
Measurements:	twpmplC2.a1: range_bin_time time pulse_rep total_counts voltage_05 lon energy_monitor transceiver_altitude_angle base_time range_offset Preliminary cloud base height(preliminary_cbh) detector_counts property alt assumed_zero_range_bin laser_temp scalar_sync_offset shots_summed shots_sum background_signal instrument_temp range time_offset Pressure, associated geometric height, at altitude, NGM model output(height) lat voltage_15 Backscatter(backscatter) range_bin_width voltage_10 filter_temp laser_scalar_sync_offset max_altitude trigger_freq transceiver_azimuth_angle detector_temp laser_sync_offset deadtime_correction range_bins twpmplC2.00: Raw data stream - documentation not supported

Back To Table of Contents

END OF DATA