Data Quality Reports for Session: 101464 User: wardrich Completed: 09/06/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040706.4SGP/MPL/C1 - Reduced detection sensitivitysgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1


DQRID : D040706.4
Start DateStart TimeEnd DateEnd Time
07/01/2004150007/07/20040350
07/23/2004220009/10/20042100
Subject:
SGP/MPL/C1 - Reduced detection sensitivity
DataStreams:sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1
Description:
During the time periods indicated, the laser power supply was low.  This resulted in 
compromised detection sensitivity, particularly for thin clouds and/or during daylight hours.  
That is, some clouds may not have been identified.  The low laser power would not have 
resulted in false positives.
Measurements:sgpmplC1.a1:
  • Preliminary cloud base height above ground level(preliminary_cbh)
sgpmplsmask1clothC1.c1:
  • MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth)
sgpmplcmask1clothC1.c1:
  • MPL Clothiaux et al. Algorithm Cloud Mask Occurrence(CloudMaskMplCloth)
sgpmplnor1campC1.c1:
  • Cloud mask(cloud_mask_2)
  • Flag indicating whether the beam was extinguished at indicated cloud top(cloud_top_attenuation_flag)
  • Cloud mask(cloud_mask_1)
  • Cloud base height (for first cloud above height threshold)(cloud_base_height)
  • Cloud top height (for highest cloud sensed)(cloud_top_height)

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