DQRs for Session: 184103 User:balmesk1Completed: 03-09-2017

Data Quality Reports for Session: 184103 User: balmesk1 Completed: 03/09/2017

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected	Data Quality Metric
D110409.1	SGP/RL/C1 - Incorrect time array	sgprlprofmerge1turnC1.c0	Incorrect
D110720.1	SGP/RL/C1 - Malfunction in WFOV data acquisition	sgprlprofmerge1turnC1.c0	Incorrect
D111004.1	SGP/RL/C1 - Frequent intermittent drop-outs in the WFOV photon counting signals	sgprlprofmerge1turnC1.c0	Incorrect
D111004.3	SGP/RL/C1 - Bad shot count data	sgprlprofmerge1turnC1.c0	Incorrect
D140221.8	SGP/RL/C1 - Reprocessing Notice (RID 1026)	sgprlprofmerge1turnC1.c0	Does not affect quality
D140326.7	SGP/RLPROF/C1 - Reduced signal due to partially closed laser shutter	sgprlprofmerge1turnC1.c0	Suspect
D140416.3	SGP/RLPROF/C1 - Reduced SNR due to partial laser blockage	sgprlprofmerge1turnC1.c0	Suspect
D140619.4	SGP/RLPROF/C1 - Invalid data due to hatch closure	sgprlprofmerge1turnC1.c0	Incorrect

DQRID : D110409.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
03/27/2011	0100	03/29/2011	1300	Incorrect

Subject:	SGP/RL/C1 - Incorrect time array
DataStreams:	sgprlprofmerge1turnC1.c0
Description:	On March 27 2011 at 0100 GMT the Raman lidar's instrument computer automatically advanced it's time by one hour (transition to daylight savings time). The problem was eventually fixed on March 29 2011 at 1300 when the clock was set back one hour to the correct time. The ingest experienced problems when the clock was set back one hour. The time arrays in the following files are set one hour ahead of what they should be: 1. sgprlC1.a0.20110327.000001.cdf for profile indices equal to or greater than 355 2. all of sgprlC1.a0.20110327.120001.cdf 3. all of sgprlC1.a0.20110328.134549.cdf 4. all of sgprlC1.a0.20110329.000005.cdf 5. sgprlC1.a0.20110329.120005.cdf for profile indices less than or equal to 72 Also, the time arrays in sgprlC1.a0.20110329.120005.cdf between profile indices 73 through 641 are incorrect. In this case, the offset varies approximately linearly with profile index from 1 hour at index 73 to 0 at index 641. The ingest apparently introduced some unphysical variations in time in this part of the file.
Measurements:	sgprlprofmerge1turnC1.c0: time time_offset base_time

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DQRID : D110720.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
05/31/2011	1400	08/23/2011	2011	Incorrect

Subject:	SGP/RL/C1 - Malfunction in WFOV data acquisition
DataStreams:	sgprlprofmerge1turnC1.c0
Description:	A malfunction in the data acquisition hardware resulted in corrupted data in the wide-field-of-view (WFOV) nitrogen, water vapor and elastic channels. The problem is so serious as to yield these signals useless during the period covered by this DQR. Do not use any data products derived from the WFOV raw signals during the period covered by this DQR. This includes water vapor mixing ratio, aerosol scattering ratio, and aerosol extinction. The narrow-field-of-view (NFOV)channels are unaffected by this problem. So data products derived from only the NFOV channel should be okay. These include the 'high' channel signals from the merge VAP, depolarization and temperature.
Measurements:	sgprlprofmerge1turnC1.c0: elastic_counts_low_glue_coef_slope parameters_elastic_low parameters_nitrogen_low nitrogen_counts_low_glue_coef_slope water_counts_low_glue_coef_slope parameters_water_low nitrogen_counts_low_glue_coef_offset elastic_counts_low_glue_coef_offset water_counts_low_glue_coef_offset Merged count rate for nitrogen counts low(nitrogen_counts_low) Merged count rate for water counts low(water_counts_low) Merged count rate for elastic counts low(elastic_counts_low)

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DQRID : D111004.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
05/31/2011	1330	08/19/2011	1900	Incorrect

Subject:	SGP/RL/C1 - Frequent intermittent drop-outs in the WFOV photon counting signals
DataStreams:	sgprlprofmerge1turnC1.c0
Description:	Beginning suddenly, near 1330 UTC on 31 May 2011, the liquid water and all three WFOV channels began showing intermittent and frequent drop-outs in the photon counting signals. These drop-outs were periods when the signal would momentarily fade and then come back. This problem, which was traced to a malfunction of the Licel data recorders, occurred at irregular intervals and with such frequency as to render the data from the affected channels useless. This problem persisted until repairs were made to the Licel transient recorders on 19 August 2011. Although only the WFOV channels (and liquid water channel) were affected, the aerosol and water vapor mixing ratio VAPs are computed by combining NFOV and WFOV channels. Thus, all of these higher level data products were adversely impacted by the drop-out problem. The NFOV data in the sgprlC1.a0 and sgprlprofmerge1turnC1.c0 datastreams were unaffected by the "drop-out" problem. These signals could be used to compute aerosol optical properties and water vapor mixing ratio.
Measurements:	sgprlprofmerge1turnC1.c0: parameters_elastic_low solar_background_nitrogen_low water_counts_low_glue_coef_offset elastic_counts_low_glue_coef_slope electronic_background_nitrogen_analog_low solar_background_water_low nitrogen_counts_low_glue_coef_slope water_counts_low_glue_coef_slope parameters_water_low solar_offset_nudge_nl Merged count rate for elastic counts low(elastic_counts_low) liquid_counts_high_glue_coef_slope solar_offset_nudge_lw liquid_counts_high solar_offset_nudge_wl electronic_background_elastic_analog_low electronic_background_water_analog_low liquid_counts_high_glue_coef_offset solar_offset_nudge_el parameters_nitrogen_low elastic_counts_low_glue_coef_offset nitrogen_counts_low_glue_coef_offset Merged count rate for nitrogen counts low(nitrogen_counts_low) Merged count rate for water counts low(water_counts_low) solar_background_elastic_low

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DQRID : D111004.3

Start Date	Start Time	End Date	End Time	Data Quality Metric
09/29/2011	0000	10/06/2011	1500	Incorrect
07/15/2011	1000	07/15/2011	1400	Incorrect
05/03/2012	1430	06/12/2012	1930	Incorrect
08/08/2011	1300	09/15/2011	0000	Incorrect

Subject:	SGP/RL/C1 - Bad shot count data
DataStreams:	sgprlprofmerge1turnC1.c0
Description:	The number of laser pulses averaged per profile, or shot count, exhibited erratic behavior during the periods in question. The values reported in the sgprlC1.a0 datastream were incorrect and varied radically from profile to profile. Shot counts are used in the Merge VAP to compute photon count rates, which are then used by all the other RL VAPs. Thus, the shot count problem renders all of the RL VAPs bad or suspect during the periods in question. It appears that the problem was caused as the signal on the line between two triggering units got noisier over time, causing the second unit to occasionally trigger on noise. The second unit triggers the Licel electronics. So the false triggering on the second unit caused false shot count readings. On 6 October 2011 the trigger level was adjusted by the on-site technician, and this solved the problem. On 3 May 2012 the DG535 pulse generator, which is used to trigger the Licel data recorders, was swapped out with a spare. After installation of the spare, the system started recording erroneous values of shot counts. The problem was fixed on 12 June 2012 when the on-site tech increased trigger level on the DG535.
Measurements:	sgprlprofmerge1turnC1.c0: solar_offset_nudge_t2 electronic_background_t1_analog_high Preliminary cloud base height above ground level(cbh) parameters solar_background_nitrogen_low solar_offset_nudge_t1 electronic_background_t2_analog_high Merged count rate for nitrogen counts high(nitrogen_counts_high) shots_summed electronic_background_depolarization_analog_high nitrogen_counts_low_glue_coef_slope solar_background_water_low parameters_water_low solar_offset_nudge_nl water_counts_high_glue_coef_slope t2_counts_high_glue_coef_offset Merged count rate for elastic counts low(elastic_counts_low) solar_offset_nudge_nh solar_offset_nudge_wl electronic_background_elastic_analog_low parameters_t1_high parameters_nitrogen_high t1_counts_high_glue_coef_offset solar_offset_nudge_eh electronic_background_water_analog_high t1_counts_high_glue_coef_slope solar_offset_nudge_el solar_offset_nudge_wh nitrogen_counts_low_glue_coef_offset solar_background_elastic_low Merged count rate for elastic high channel(elastic_counts_high) electronic_background_elastic_analog_high depolarization_counts_high_glue_coef_slope electronic_background_liquid_analog_high parameters_elastic_low parameters_elastic_high parameters_t2_high water_counts_low_glue_coef_offset elastic_counts_high_glue_coef_slope elastic_counts_low_glue_coef_slope electronic_background_nitrogen_analog_low Merged count rate for water counts high(water_counts_high) water_counts_low_glue_coef_slope depolarization_counts_high_glue_coef_offset solar_offset_nudge_dh nitrogen_counts_high_glue_coef_slope liquid_counts_high_glue_coef_slope solar_offset_nudge_lw electronic_background_nitrogen_analog_high parameters_water_high Merged count rate for t1 counts high(t1_counts_high) liquid_counts_high t2_counts_high_glue_coef_slope cloud_value_check Merged count rate(depolarization_counts_high) elastic_counts_high_glue_coef_offset nitrogen_counts_high_glue_coef_offset electronic_background_water_analog_low merge_flags_low n2_cloud_check_value liquid_counts_high_glue_coef_offset water_counts_high_glue_coef_offset parameters_nitrogen_low elastic_counts_low_glue_coef_offset merge_flags_high Merged count rate for water counts low(water_counts_low) parameters_liquid_high parameters_depolarization_high Merged count rate for nitrogen counts low(nitrogen_counts_low) Merged count rate for t2 counts high(t2_counts_high)

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DQRID : D140221.8

Start Date	Start Time	End Date	End Time	Data Quality Metric
05/03/2012	0000	01/28/2014	0000	Does not affect quality

Subject:	SGP/RL/C1 - Reprocessing Notice (RID 1026)
DataStreams:	sgprlprofmerge1turnC1.c0
Description:	See below for details of reprocessing that was completed on 20140822. Original DQR category:3 (Yellow, Suspect ). ----------------------------------------------------------- Regions where photon counting rates exceed 20 MHz are 37.5 meters too high. Correct data by shifting down 37.5 meters. Additional information: The detection system in the RL uses Licel data recorders. These recorders provide simultaneous measurements of analog voltage and photon counts from the photo multiplier tubes. The analog signal has an inherent delay relative to the photon counting signal, which is corrected for in the rlprofmerge VAP. The delay parameter is determined through offline analysis by the instrument mentor, and then inputted into a configuration file that is used by the VAP. During the effected period, the delay parameter for the narrow-field-of-view elastic channel was incorrect. As a result, the analog signal leads the photon counting signal by 5 range bins (5X7.5m = 37.5m). Photon counting rates that are outputted by the rlprofmerge VAP use the analog signals in regions where the photon counting rates exceed 20 MHz. So the counting rate data in these regions are (incorrectly) shifted downward by 37.5 m (i.e. -37.5m).
Measurements:	sgprlprofmerge1turnC1.c0: height_high elastic_counts_high_glue_coef_slope elastic_counts_high_glue_coef_offset Merged count rate for elastic high channel(elastic_counts_high) electronic_background_elastic_analog_high

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DQRID : D140326.7

Start Date	Start Time	End Date	End Time	Data Quality Metric
03/25/2014	1500	03/26/2014	1220	Suspect

Subject:	SGP/RLPROF/C1 - Reduced signal due to partially closed laser shutter
DataStreams:	sgprlprofmerge1turnC1.c0
Description:	The laser shutter was partially closed during the period in question. This resulted in a reduction in the sensitivity of all detection channels.
Measurements:	sgprlprofmerge1turnC1.c0: solar_offset_nudge_t2 electronic_background_t1_analog_high Preliminary cloud base height above ground level(cbh) parameters solar_offset_nudge_t1 solar_background_nitrogen_low electronic_background_t2_analog_high Merged count rate for nitrogen counts high(nitrogen_counts_high) Humidity, relative, on hybrid-b grid, derived from RUC model(rh) electronic_background_depolarization_analog_high shots_summed nitrogen_counts_low_glue_coef_slope solar_background_water_low parameters_water_low s10 solar_offset_nudge_nl height_low water_counts_high_glue_coef_slope t2_counts_high_glue_coef_offset Merged count rate for elastic counts low(elastic_counts_low) solar_offset_nudge_nh s7 s8 s9 solar_offset_nudge_wl electronic_background_elastic_analog_low parameters_t1_high parameters_nitrogen_high s1 s2 s3 s4 s5 s6 electronic_background_water_analog_high t1_counts_high_glue_coef_offset solar_offset_nudge_eh t1_counts_high_glue_coef_slope solar_offset_nudge_el solar_offset_nudge_wh nitrogen_counts_low_glue_coef_offset solar_background_elastic_low Merged count rate for elastic high channel(elastic_counts_high) electronic_background_elastic_analog_high depolarization_counts_high_glue_coef_slope filter electronic_background_liquid_analog_high parameters_elastic_low pulse_energy parameters_t2_high parameters_elastic_high water_counts_low_glue_coef_offset elastic_counts_high_glue_coef_slope elastic_counts_low_glue_coef_slope electronic_background_nitrogen_analog_low Merged count rate for water counts high(water_counts_high) height_high water_counts_low_glue_coef_slope depolarization_counts_high_glue_coef_offset solar_offset_nudge_dh nitrogen_counts_high_glue_coef_slope liquid_counts_high_glue_coef_slope solar_offset_nudge_lw electronic_background_nitrogen_analog_high parameters_water_high Merged count rate for t1 counts high(t1_counts_high) liquid_counts_high t2_counts_high_glue_coef_slope cloud_value_check Merged count rate(depolarization_counts_high) elastic_counts_high_glue_coef_offset nitrogen_counts_high_glue_coef_offset temp1 electronic_background_water_analog_low temp3 n2_cloud_check_value Model derived 2-meter temperature(temp2) merge_flags_low temp5 liquid_counts_high_glue_coef_offset temp4 water_counts_high_glue_coef_offset parameters_nitrogen_low temp6 elastic_counts_low_glue_coef_offset merge_flags_high parameters_depolarization_high Merged count rate for water counts low(water_counts_low) parameters_liquid_high Merged count rate for nitrogen counts low(nitrogen_counts_low) Merged count rate for t2 counts high(t2_counts_high) laser_head

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DQRID : D140416.3

Start Date	Start Time	End Date	End Time	Data Quality Metric
03/25/2014	1500	03/26/2014	1215	Suspect

Subject:	SGP/RLPROF/C1 - Reduced SNR due to partial laser blockage
DataStreams:	sgprlprofmerge1turnC1.c0
Description:	The laser output was partially blocked. This resulted in reduced SNR in all detection channels.
Measurements:	sgprlprofmerge1turnC1.c0: Merged count rate for nitrogen counts high(nitrogen_counts_high) Merged count rate for t1 counts high(t1_counts_high) liquid_counts_high Merged count rate for water counts high(water_counts_high) Merged count rate(depolarization_counts_high) Merged count rate for nitrogen counts low(nitrogen_counts_low) Merged count rate for water counts low(water_counts_low) Merged count rate for elastic high channel(elastic_counts_high) Merged count rate for t2 counts high(t2_counts_high) Merged count rate for elastic counts low(elastic_counts_low)

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DQRID : D140619.4

Start Date	Start Time	End Date	End Time	Data Quality Metric
06/18/2014	1910	06/19/2014	2145	Incorrect

Subject:	SGP/RLPROF/C1 - Invalid data due to hatch closure
DataStreams:	sgprlprofmerge1turnC1.c0
Description:	The outgoing beam was completely blocked by the hatch. As a result, the data contain no valid atmospheric signals.
Measurements:	sgprlprofmerge1turnC1.c0: solar_offset_nudge_t2 electronic_background_t1_analog_high Preliminary cloud base height above ground level(cbh) solar_background_nitrogen_low solar_offset_nudge_t1 electronic_background_t2_analog_high Merged count rate for nitrogen counts high(nitrogen_counts_high) electronic_background_depolarization_analog_high nitrogen_counts_low_glue_coef_slope solar_background_water_low solar_offset_nudge_nl water_counts_high_glue_coef_slope t2_counts_high_glue_coef_offset Merged count rate for elastic counts low(elastic_counts_low) solar_offset_nudge_nh solar_offset_nudge_wl electronic_background_elastic_analog_low t1_counts_high_glue_coef_offset solar_offset_nudge_eh electronic_background_water_analog_high t1_counts_high_glue_coef_slope solar_offset_nudge_el solar_offset_nudge_wh nitrogen_counts_low_glue_coef_offset solar_background_elastic_low Merged count rate for elastic high channel(elastic_counts_high) electronic_background_elastic_analog_high depolarization_counts_high_glue_coef_slope electronic_background_liquid_analog_high water_counts_low_glue_coef_offset elastic_counts_high_glue_coef_slope elastic_counts_low_glue_coef_slope electronic_background_nitrogen_analog_low Merged count rate for water counts high(water_counts_high) water_counts_low_glue_coef_slope depolarization_counts_high_glue_coef_offset solar_offset_nudge_dh nitrogen_counts_high_glue_coef_slope liquid_counts_high_glue_coef_slope electronic_background_nitrogen_analog_high solar_offset_nudge_lw Merged count rate for t1 counts high(t1_counts_high) liquid_counts_high t2_counts_high_glue_coef_slope cloud_value_check Merged count rate(depolarization_counts_high) elastic_counts_high_glue_coef_offset nitrogen_counts_high_glue_coef_offset electronic_background_water_analog_low merge_flags_low n2_cloud_check_value liquid_counts_high_glue_coef_offset water_counts_high_glue_coef_offset elastic_counts_low_glue_coef_offset merge_flags_high Merged count rate for water counts low(water_counts_low) Merged count rate for nitrogen counts low(nitrogen_counts_low) Merged count rate for t2 counts high(t2_counts_high)

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