DQRs for Session: 153307 User:wasserl1Completed: 10-08-2013

Data Quality Reports for Session: 153307 User: wasserl1 Completed: 10/08/2013

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D130712.3	NSA/HSRL/C1 - Reprocess: Missing atten_beta_r_backscatter	nsahsrlC1.a1
D130712.4	NSA/HSRL/C1 - Degraded operation	nsahsrlC1.a1
D130712.5	NSA/HSRL/C1 - Missing data	nsahsrlC1.a1
D130712.6	NSA/HSRL/C1 - Instrument reinstallation	nsahsrlC1.a1
D130712.7	NSA/HSRL/C1 - Degraded operation, laser instability, dirty window	nsahsrlC1.a1
D130712.8	NSA/HSRL/C1 - Laser instability	nsahsrlC1.a1

DQRID : D130712.3

Start Date	Start Time	End Date	End Time
02/22/2013	0000	08/01/2013	2359

Subject:	NSA/HSRL/C1 - Reprocess: Missing atten_beta_r_backscatter
DataStreams:	nsahsrlC1.a1
Description:	Due to a processing error the atten_beta_r_backscatter variable is missing 100% of the time. This is not a critical problem as the rest of the subsequent derived fields are properly reported. Data will be reprocessed at a later date.
Measurements:	nsahsrlC1.a1: atten_beta_r_backscatter

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DQRID : D130712.4

Start Date	Start Time	End Date	End Time
04/08/2011	0000	12/04/2011	2359

Subject:	NSA/HSRL/C1 - Degraded operation
DataStreams:	nsahsrlC1.a1
Description:	The HSRL was suffering from operational issues following an enclosure overheating incident. Data continued to be collected, albeit with reduced power output, detection sensitivity, and calibration issues. It has utility for cloud and aerosol detection but must be used with caution. Heights and locations are quantitative and reliable, intensities are not.
Measurements:	nsahsrlC1.a1: Particulate extinction cross section per unit volume(beta_a) Linear depolarization ratio profile(depol) Particulate backscatter cross section per unit volume(beta_a_backscatter)

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DQRID : D130712.5

Start Date	Start Time	End Date	End Time
12/05/2011	0000	10/08/2012	2359

Subject:	NSA/HSRL/C1 - Missing data
DataStreams:	nsahsrlC1.a1
Description:	Data are missing and unrecoverable.
Measurements:	nsahsrlC1.a1: combined_gain frequency_quality raob_beta_m cal_time beta_a_backscatter_std Particulate extinction cross section per unit volume(beta_a) molecular_counts dewpoint_profile seed_quality lock_quality range_resolution combined_counts_hi cal_time_vector pressure_profile mol_dark_count lon lat temperature_profile time_average mol_cal_pulse combined_dark_count_hi combined_merge_threshold Particulate backscatter cross section per unit volume(beta_a_backscatter) combined_dark_count_lo geo_cor profile_mask range atten_beta_r_backscatter base_time time_offset combined_counts_lo time c_pol_dark_count num_seeded_shots lidar_calibration_Cmc lidar_calibration_Cam cal_trigger od Linear depolarization ratio profile(depol) lidar_calibration_Cmm cross_counts piezovoltage raob_station transmitted_energy top_alt_sounding raob_time alt raob_time_vector

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DQRID : D130712.6

Start Date	Start Time	End Date	End Time
10/09/2012	0000	10/12/2012	2359

Subject:	NSA/HSRL/C1 - Instrument reinstallation
DataStreams:	nsahsrlC1.a1
Description:	Instrument was being reinstalled. Data are not valid, do not use.
Measurements:	nsahsrlC1.a1: combined_gain frequency_quality raob_beta_m molecular_counts Particulate extinction cross section per unit volume(beta_a) beta_a_backscatter_std cal_time dewpoint_profile seed_quality range_resolution lock_quality combined_counts_hi cal_time_vector pressure_profile mol_dark_count temperature_profile mol_cal_pulse combined_dark_count_hi combined_merge_threshold Particulate backscatter cross section per unit volume(beta_a_backscatter) combined_dark_count_lo geo_cor range profile_mask atten_beta_r_backscatter combined_counts_lo c_pol_dark_count lidar_calibration_Cmc num_seeded_shots lidar_calibration_Cam cal_trigger od lidar_calibration_Cmm Linear depolarization ratio profile(depol) cross_counts raob_station piezovoltage raob_time top_alt_sounding transmitted_energy raob_time_vector

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DQRID : D130712.7

Start Date	Start Time	End Date	End Time
10/13/2012	0000	03/18/2013	1730

Subject:	NSA/HSRL/C1 - Degraded operation, laser instability, dirty window
DataStreams:	nsahsrlC1.a1
Description:	Following installation instrument was still not operating optimally. Laser instability and reduced sensitivity were impacting measurements. Cleaning of the external window improved signal levels and sensitivity on March 18 17:30. The height of detected clouds and aerosols is quantitative and accurate however the calibrated backscatter quantities are uncertain. Nevertheless, the sensitivity of the HSRL even in this degraded capacity is superior to VCeil and MPL for cloud and aerosol detection.
Measurements:	nsahsrlC1.a1: Particulate extinction cross section per unit volume(beta_a) Linear depolarization ratio profile(depol) Particulate backscatter cross section per unit volume(beta_a_backscatter)

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DQRID : D130712.8

Start Date	Start Time	End Date	End Time
03/18/2013	1730	07/19/2013	2230

Subject:	NSA/HSRL/C1 - Laser instability
DataStreams:	nsahsrlC1.a1
Description:	The HSRL laser still exhibits instability causing calibration uncertainty, especially for the beta_a (extinction profile), beta_a_backscatter (backscatter profile), and depol (depolarization ratio). Cloud and aerosol layer heights are quantitative and accurate however the calibrated quantities above have increased uncertainty. Nevertheless, the sensitivity of the HSRL in this degraded mode is still superior to other lidar on site (MPL and VCeil). The laser failed on 07/19/2013 at 22:30.
Measurements:	nsahsrlC1.a1: Particulate extinction cross section per unit volume(beta_a) Linear depolarization ratio profile(depol) Particulate backscatter cross section per unit volume(beta_a_backscatter)

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