Data Quality Reports for Session: 154700 User: cj_flynn Completed: 11/21/2013

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D130712.3NSA/HSRL/C1 - Reprocess: Missing atten_beta_r_backscatternsahsrlC1.a1
D130712.8NSA/HSRL/C1 - Laser instabilitynsahsrlC1.a1


DQRID : D130712.3
Start DateStart TimeEnd DateEnd Time
02/22/2013000008/01/20132359
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 : D130712.8
Start DateStart TimeEnd DateEnd Time
03/18/2013173007/19/20132230
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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END OF DATA