Data Quality Reports for Session: 101065 User: loknath Completed: 08/10/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060621.2TWP/MPL/C2 - Optical throughput unacceptabletwpmplC2.00, twpmplC2.a1


DQRID : D060621.2
Start DateStart TimeEnd DateEnd Time
02/01/2003000011/12/20041900
Subject:
TWP/MPL/C2 - Optical throughput unacceptable
DataStreams:twpmplC2.00, twpmplC2.a1
Description:
The optical throughput of the MPL at Nauru is below an acceptable level. Despite an 
extended stay to address the problem in Feb 2003, the problem was unresolved.  An additional 
repair was attempted in July 2003 with no significant success.  Several optical components 
were replaced and the system was repeatedly re-aligned.  

The system appears to have been properly collimated as the shape of the signal is 
appropriate for both near and far range.  The magnitude of the signal was simply too low.  This 
signal decrease was apparent in ambient background values as well as from atmospheric 
signal, so the impact on data quality was not as severe as might otherwise be the case.  The 
MPL was still capable of detecting high altitude cirrus (day and night) but the 
sensitivity was reduced.
Measurements:twpmplC2.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

twpmplC2.a1:
  • Attenuated backscatter(detector_counts)


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