Data Quality Reports for Session: 185645 User: dzhang4 Completed: 05/16/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D160104.7SGP Site Power Outage Due to Winter StormsgpdlfptC1.b1Does not affect quality
D160520.12SGP/DL/DLPROF/C1 - Reprocess: Incorrect serial numbersgpdlfptC1.b1Does not affect quality
D160617.10SGP/DL/C1 - Power supply issuesgpdlfptC1.b1Missing
D170303.10SGP/DL/C1 - Returned to vendor for repairsgpdlfptC1.b1Suspect
D170303.11SGP/DL/C1 - InstrumentsgpdlfptC1.b1Does not affect quality
D170310.16SGP/Central Facility - Power OutagesgpdlfptC1.b1Does not affect quality


DQRID : D160104.7
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/26/2015000001/01/20162359Does not affect quality
Subject:
SGP Site Power Outage Due to Winter Storm
DataStreams:sgpdlfptC1.b1
Description:
On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought 
sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result 
was very very slick roads and mass power outages.
 
The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th.  
The power was restored on 7:56 PM CDT on Wednesday, December 30th
 
Site Emergency procedures were activated and Technicians drained water out of instrument 
reservoirs and other measures as needed, early Monday morning.
 
On Wednesdays as roads and power started was restored to much of the areas east of I-35 , 
Site Technicians performed maintenance on several Extended Facilities.

During this period, data are potentially missing, incorrect, or suspect.  Carefully 
inspect the data before use.
Measurements:sgpdlfptC1.b1:
  • North latitude(lat)
  • time_offset
  • azimuth
  • range
  • Altitude above mean sea level(alt)
  • Radial velocity(radial_velocity)
  • intensity
  • Attenuated backscatter(attenuated_backscatter)
  • East longitude(lon)
  • base_time
  • time
  • elevation


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DQRID : D160520.12
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/02/2016180005/19/20162200Does not affect quality
Subject:
SGP/DL/DLPROF/C1 - Reprocess: Incorrect serial number
DataStreams:sgpdlfptC1.b1
Description:
The instrument serial number that appears in the netcdf files global attributes is 
incorrect. The correct serial number is 0116-107.
Measurements:sgpdlfptC1.b1:
  • base_time


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DQRID : D160617.10
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/27/2016202005/31/20161627Missing
Subject:
SGP/DL/C1 - Power supply issue
DataStreams:sgpdlfptC1.b1
Description:
The supply voltage from the external power supply was running low due to overheating. As a 
result, the instrument was intentionally shutdown for the long Memorial Day weekend.
Measurements:sgpdlfptC1.b1:
  • time_offset
  • Altitude above mean sea level(alt)
  • Attenuated backscatter(attenuated_backscatter)
  • qc_time
  • base_time
  • North latitude(lat)
  • qc_radial_velocity
  • azimuth
  • range
  • Radial velocity(radial_velocity)
  • intensity
  • East longitude(lon)
  • time
  • elevation


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DQRID : D170303.10
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/10/2016120002/23/20171701Suspect
Subject:
SGP/DL/C1 - Returned to vendor for repair
DataStreams:sgpdlfptC1.b1
Description:
No data was recorded during the period in question because the lidar was shipped to the 
vendor for repair to fix the problem with the high internal relative humidity.
Measurements:sgpdlfptC1.b1:
  • time_offset
  • Altitude above mean sea level(alt)
  • Attenuated backscatter(attenuated_backscatter)
  • qc_time
  • base_time
  • North latitude(lat)
  • qc_radial_velocity
  • azimuth
  • range
  • Radial velocity(radial_velocity)
  • intensity
  • East longitude(lon)
  • time
  • elevation


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DQRID : D170303.11
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/23/2017170202/27/20171618Does not affect quality
Subject:
SGP/DL/C1 - Instrument
DataStreams:sgpdlfptC1.b1
Description:
The instrument was returned to service on 23 February following repair by the vendor. Once 
it was brought into service the lidar defaulted to a scan schedule that the vendor was 
using. This was a slant path stare at an elevation angle of 12 degrees. On 27 February the 
mentor reset the scan schedule to the "normal" schedule.
Measurements:sgpdlfptC1.b1:
  • time_offset
  • Altitude above mean sea level(alt)
  • Attenuated backscatter(attenuated_backscatter)
  • qc_time
  • base_time
  • North latitude(lat)
  • qc_radial_velocity
  • azimuth
  • range
  • Radial velocity(radial_velocity)
  • intensity
  • East longitude(lon)
  • time
  • elevation


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DQRID : D170310.16
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/05/2017002303/09/20171430Does not affect quality
Subject:
SGP/Central Facility - Power Outage
DataStreams:sgpdlfptC1.b1
Description:
Automated scripts show that these instruments were affected by a power outage at the 
central facility resulting in missing data.  Most of the instruments came back online on March 
6th but some took longer.
Measurements:sgpdlfptC1.b1:
  • time_offset
  • Altitude above mean sea level(alt)
  • Attenuated backscatter(attenuated_backscatter)
  • qc_time
  • base_time
  • North latitude(lat)
  • qc_radial_velocity
  • azimuth
  • Radial velocity(radial_velocity)
  • range
  • intensity
  • East longitude(lon)
  • elevation
  • time


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