Data Quality Reports for Session: 124514 User: sbenson Completed: 11/25/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D000504.4TWP/VCEIL/C1 - Ceilometer offsettwpvceil25kC1.b1
D000927.2TWP/VCEIL/C1 - Degraded Ceilometer Windowtwpvceil25kC1.a1, twpvceil25kC1.b1
D010222.1TWP/VCEIL/C1 - Receiver Problemtwpvceil25kC1.a1, twpvceil25kC1.b1
D020620.64TWP/C1 - Incorrect elevation reported in Manus DatatwpmplC1.a1, twpvceil25kC1.a1, twpvceil25kC1.b1


DQRID : D000504.4
Start DateStart TimeEnd DateEnd Time
01/28/2000020003/28/20000000
Subject:
TWP/VCEIL/C1 - Ceilometer offset
DataStreams:twpvceil25kC1.b1
Description:
When the replacement ceilometer was installed at Manus it was tilted 6 degrees.
Since the angle correction setting was not activated, the cloud base heights
reported by the instrument were higher than actual by 0.55% (39 m at 7 km).
Measurements:twpvceil25kC1.b1:
  • Third cloud base height(third_cbh)
  • Lowest cloud base height detected.(first_cbh)
  • Second lowest cloud base height(second_cbh)

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DQRID : D000927.2
Start DateStart TimeEnd DateEnd Time
10/28/1999000001/28/20000000
Subject:
TWP/VCEIL/C1 - Degraded Ceilometer Window
DataStreams:twpvceil25kC1.a1, twpvceil25kC1.b1
Description:
Data from the ceilometer during this period is suspect. From 10/28
until about 2/4 the instrument had a deteriorated window.  This
caused the ceilometer to only be able to see cloud heights up to
about 2 km.
Measurements:twpvceil25kC1.a1:
  • Third cloud base height(third_cbh)
  • Aerosol backscatter coefficient at 355 nm(backscatter)
  • Lowest cloud base height detected.(first_cbh)
  • Second lowest cloud base height(second_cbh)
twpvceil25kC1.b1:
  • Third cloud base height(third_cbh)
  • Lowest cloud base height detected.(first_cbh)
  • Aerosol backscatter coefficient at 355 nm(backscatter)
  • Second lowest cloud base height(second_cbh)

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DQRID : D010222.1
Start DateStart TimeEnd DateEnd Time
11/12/2000000002/09/20010000
Subject:
TWP/VCEIL/C1 - Receiver Problem
DataStreams:twpvceil25kC1.a1, twpvceil25kC1.b1
Description:
The Manus ceilometer had degraded cloud base height due to a receiver problem
Measurements:twpvceil25kC1.a1:
  • Third cloud base height(third_cbh)
  • Aerosol backscatter coefficient at 355 nm(backscatter)
  • Lowest cloud base height detected.(first_cbh)
  • Second lowest cloud base height(second_cbh)
twpvceil25kC1.b1:
  • Third cloud base height(third_cbh)
  • Lowest cloud base height detected.(first_cbh)
  • Aerosol backscatter coefficient at 355 nm(backscatter)
  • Second lowest cloud base height(second_cbh)

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DQRID : D020620.64
Start DateStart TimeEnd DateEnd Time
10/11/1996080106/22/20002359
Subject:
TWP/C1 - Incorrect elevation reported in Manus Data
DataStreams:twpmplC1.a1, twpvceil25kC1.a1, twpvceil25kC1.b1
Description:
Bill Clements reports we have been using 6m MSL as the station elevation of Momote 
(Manus).  This was based on information posted near the station barometer in the Momote Weather 
Service Office.  It turns out that the official WMO station elevation for Momote is 4m 
MSL and the upper air elevation is 5m MSL.

All Manus instruments except the sonde station are at 4m MSL. The sonde launching station 
is at 5m MSL.
Measurements:twpmplC1.a1:
  • Dummy altitude for Zeb(alt)
twpvceil25kC1.a1:
  • Dummy altitude for Zeb(alt)
twpvceil25kC1.b1:
  • Dummy altitude for Zeb(alt)

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