DQRs for Session: 133007 User:rojCompleted: 02-06-2011

Data Quality Reports for Session: 133007 User: roj Completed: 02/06/2011

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D020227.8	SGP/MPL/C1 - Data missing due to hardware failures	sgpmplC1.00, sgpmplC1.a0, sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c0, sgpmplcbh1scottC1.c1
D040424.1	SGP/MPL/C1 - Signal degrading	sgpmplC1.a1, sgpmplnor1campC1.c1
D040426.4	SGP/MPL/C1 - Detector Failure	sgpmplC1.a1, sgpmplnor1campC1.c1
D040525.28	SGP/MPL/C1 - Metadata errors	sgpmplC1.a1, sgpmplnor1campC1.c1
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
D970408.3	Continuing signal degradation	sgpmplC1.a1, DsgpmplC1.00, sgpmplcbh1scottC1.c1
D990224.1	SGP/MPL - Missing data due to blown detector	sgpmplC1.a1, DsgpmplhrC1.00, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c1

DQRID : D020227.8

Start Date	Start Time	End Date	End Time
08/10/2001	0000	10/29/2001	2033

Subject:	SGP/MPL/C1 - Data missing due to hardware failures
DataStreams:	sgpmplC1.00, sgpmplC1.a0, sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c0, sgpmplcbh1scottC1.c1
Description:	The MPL instrument was out of service during the time range specified due to hardware failures. Data during this period are missing and unrecoverable.
Measurements:	sgpmplC1.a0: base_time cloud_base_height_dq_flag lat Cloud base height(cloud_base_height) detector_temp laser_temp energy_monitor alt time_offset pulse_rep Pressure, associated geometric height, at altitude, NGM model output(height) shots_summed background_signal voltage_05 instrument_temperature lon filter_temp instrument_temp Backscatter(backscatter) voltage_10 voltage_15 sgpmplcbh1scottC1.c1: Preliminary cloud base height above ground level(cbh) lon alt base_time time_offset lat sgpmplC1.a1: lon Pressure, associated geometric height, at altitude, NGM model output(height) range_offset laser_scalar_sync_offset Preliminary cloud base height above ground level(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 background_signal total_counts lat shots_sum range 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 random_error cloud_mask_2 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 sgpmplC1.00: Raw data stream - documentation not supported sgpmplcbh1scottC1.c0: Raw data stream - documentation not supported

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DQRID : D040424.1

Start Date	Start Time	End Date	End Time
09/25/2002	0000	01/16/2003	2359

Subject:	SGP/MPL/C1 - Signal degrading
DataStreams:	sgpmplC1.a1, sgpmplnor1campC1.c1
Description:	The MPL viewport window was blown off during a storm on 2002/09/25. The MPL received a soaking of rain. Following this event, although site operations cleaned and dried the optics, the lidar performance continued to degrade over the next few months. Although initially suitable for cloud detection, by Dec 10th the lidar was providing useful results only during the day (oddly enough). By Jan 16, the detector was dead. It is not recommended to depend on night-time cloud base heights after Dec. 10 2002. It is not recommended to use any of the data after 9/25 for aerosol retrievals.
Measurements:	sgpmplC1.a1: lon Pressure, associated geometric height, at altitude, NGM model output(height) range_offset laser_scalar_sync_offset Preliminary cloud base height above ground level(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

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DQRID : D040426.4

Start Date	Start Time	End Date	End Time
01/16/2003	0000	01/31/2003	2359

Subject:	SGP/MPL/C1 - Detector Failure
DataStreams:	sgpmplC1.a1, sgpmplnor1campC1.c1
Description:	The detector failed following a period of data quality degradation. The MPL was replaced on 1/31/2003.
Measurements:	sgpmplC1.a1: lon Pressure, associated geometric height, at altitude, NGM model output(height) range_offset laser_scalar_sync_offset Preliminary cloud base height above ground level(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

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DQRID : D040525.28

Start Date	Start Time	End Date	End Time
05/01/1996	0000	01/19/2000	2359

Subject:	SGP/MPL/C1 - Metadata errors
DataStreams:	sgpmplC1.a1, sgpmplnor1campC1.c1
Description:	The latitude, longitude and altitude of the Micropulse Lidar (MPL) were incorrectly entered into the ARM database. The correct location of the SGP.C1 MPL is: Lat: 36.606N Lon: 97.485W Alt: 316m
Measurements:	sgpmplC1.a1: lat lon alt sgpmplnor1campC1.c1: lon lat alt

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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 above ground level(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)

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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

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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 above ground level(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)

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DQRID : D970408.3

Start Date	Start Time	End Date	End Time
03/17/1997	0000	04/14/1997	2359

Subject:	Continuing signal degradation
DataStreams:	sgpmplC1.a1, DsgpmplC1.00, sgpmplcbh1scottC1.c1
Description:	Despite recent efforts (970310-970314) by the instrument mentor, signal degradation of the MPL has continued. The degradation has continued to the point that the effective range of the MPL is nearing 10 km. The instrument mentor and PI have concluded that an overhaul of the instrument by the vendor is in order.
Measurements:	sgpmplcbh1scottC1.c1: Preliminary cloud base height above ground level(cbh) base_time time_offset lon lat alt sgpmplC1.a1: lat lon Pressure, associated geometric height, at altitude, NGM model output(height) shots_sum range range_offset laser_scalar_sync_offset Preliminary cloud base height above ground level(preliminary_cbh) voltage_05 filter_temp trigger_freq time max_altitude energy_monitor range_bins transceiver_altitude_angle detector_temp shots_summed deadtime_correction voltage_15 alt property voltage_10 range_bin_width pulse_rep Backscatter(backscatter) laser_sync_offset range_bin_time laser_temp time_offset base_time scalar_sync_offset instrument_temp background_signal total_counts transceiver_azimuth_angle DsgpmplC1.00: Development raw data stream - documentation not supported

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DQRID : D990224.1

Start Date	Start Time	End Date	End Time
11/11/1998	0000	01/23/1999	2359

Subject:	SGP/MPL - Missing data due to blown detector
DataStreams:	sgpmplC1.a1, DsgpmplhrC1.00, sgpmplnor1campC1.c1, sgpmplcbh1scottC1.c1
Description:	Sometime early 11/11 the detector on the MPL-004 blew out. The Detector was replaced by Albert Mendoza. The instrument was operational on Jan. 23, 1999. Link this to P981119.2 that reported the blown detector and the corrective action taken
Measurements:	sgpmplcbh1scottC1.c1: Preliminary cloud base height above ground level(cbh) lon alt base_time time_offset lat sgpmplC1.a1: lon Pressure, associated geometric height, at altitude, NGM model output(height) range_offset laser_scalar_sync_offset Preliminary cloud base height above ground level(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 random_error cloud_mask_2 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 DsgpmplhrC1.00: Development raw data stream - documentation not supported

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