Data Quality Reports for Session: 153092 User: iengjo Completed: 09/18/2013

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D130422.1PVC/DL/M1 - Height-dependent ringing artifact in SNR and velocity fieldpvcdlcal1M1.b1, pvcdlcal2M1.b1, pvcdlfptM1.b1, pvcdlppiM1.b1, pvcdlrhiM1.b1


DQRID : D130422.1
Start DateStart TimeEnd DateEnd Time
11/05/2012170006/19/20132359
Subject:
PVC/DL/M1 - Height-dependent ringing artifact in SNR and velocity field
DataStreams:pvcdlcal1M1.b1, pvcdlcal2M1.b1, pvcdlfptM1.b1, pvcdlppiM1.b1, pvcdlrhiM1.b1
Description:
The AMF1 Doppler lidar has exhibited a height-dependent ringing artifact in the intensity 
(SNR + 1) field since about 5 November 2012. This also affects the Doppler velocities. 
The problem results in a sinusoidal oscillation in the SNR (and velocity) with height. The 
period of the oscillation is roughly 3 km.
The exact cause is not known at this time. However, it is similar to one described in the 
system user manual as being caused by an "unthermalized digitizer."
The problem has been occuring intermittently since 5 November, 2012 (several days after 
hurricane Sandy). On average, it has occurred roughly once every 2 to 3 days, and typically 
persists for 1 to 3 hours at a time.
Measurements:pvcdlcal2M1.b1:
  • Attenuated backscatter(attenuated_backscatter)
  • radial_velocity
  • intensity
pvcdlfptM1.b1:
  • Attenuated backscatter(attenuated_backscatter)
  • radial_velocity
  • intensity
pvcdlrhiM1.b1:
  • Attenuated backscatter(attenuated_backscatter)
  • radial_velocity
  • intensity
pvcdlcal1M1.b1:
  • Attenuated backscatter(attenuated_backscatter)
  • intensity
  • radial_velocity
pvcdlppiM1.b1:
  • radial_velocity
  • Attenuated backscatter(attenuated_backscatter)
  • intensity

Back To Table of Contents


END OF DATA