DQRs for Session: 115873 User:rutanCompleted: 11-21-2008

Data Quality Reports for Session: 115873 User: rutan Completed: 11/21/2008

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D000504.4	TWP/VCEIL/C1 - Ceilometer offset	twpvceil25kC1.b1
D000927.2	TWP/VCEIL/C1 - Degraded Ceilometer Window	twpvceil25kC1.a1, twpvceil25kC1.b1
D010222.1	TWP/VCEIL/C1 - Receiver Problem	twpvceil25kC1.a1, twpvceil25kC1.b1
D020207.1	TWP/VCEIL/C1 - Manus Ceilometer Laser Power Intermittent	twpvceil25kC1.a1, twpvceil25kC1.b1
D020207.2	TWP/VCEIL/C1 - Reprocess: Incorrect units on installed ceilometer	twpvceil25kC1.a1, twpvceil25kC1.b1
D020620.64	TWP/C1 - Incorrect elevation reported in Manus Data	twpmplC1.a1, twpvceil25kC1.a1, twpvceil25kC1.b1
D021025.2	TWP/VCEIL/C2 - Nauru Vceil data suspect	twpvceil25kC2.a1, twpvceil25kC2.b1
D021212.11	TWP/VCEIL/C3 - Degraded Sensitivity, Limited Range	twpvceil25kC3.a1, twpvceil25kC3.b1

DQRID : D000504.4

Start Date	Start Time	End Date	End Time
01/28/2000	0200	03/28/2000	0000

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 Date	Start Time	End Date	End Time
10/28/1999	0000	01/28/2000	0000

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 Date	Start Time	End Date	End Time
11/12/2000	0000	02/09/2001	0000

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 : D020207.1

Start Date	Start Time	End Date	End Time
11/22/2001	0000	01/18/2002	0500

Subject:	TWP/VCEIL/C1 - Manus Ceilometer Laser Power Intermittent
DataStreams:	twpvceil25kC1.a1, twpvceil25kC1.b1
Description:	Very few cloud heights reported due to bad laser transmitter. Replaced ceilometer 05:00 GMT 18 Jan. 2002.
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 : D020207.2

Start Date	Start Time	End Date	End Time
01/18/2002	0500	02/08/2002	0400

Subject:	TWP/VCEIL/C1 - Reprocess: Incorrect units on installed ceilometer
DataStreams:	twpvceil25kC1.a1, twpvceil25kC1.b1
Description:	The units setting on the ceilometer installed on 18 Jan. 2002 were incorrectly set to feet rather than meters.
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 Date	Start Time	End Date	End Time
10/11/1996	0801	06/22/2000	2359

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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DQRID : D021025.2

Start Date	Start Time	End Date	End Time
06/05/2002	0100	09/23/2002	0100

Subject:	TWP/VCEIL/C2 - Nauru Vceil data suspect
DataStreams:	twpvceil25kC2.a1, twpvceil25kC2.b1
Description:	During this period the ceilometer began producing a cross-talk warning. Since it is a warning, some of the data are OK. However, the instrument began to be limited to detecting clouds only about 2 km above the ground.
Measurements:	twpvceil25kC2.b1: Aerosol backscatter coefficient at 355 nm(backscatter) Flag indicating aeri retrieval status(status_flag) Third cloud base height(third_cbh) Lowest cloud base height detected.(first_cbh) Warning and alarm status bits(status_string) range(range) Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity) Vertical visibility(vertical_visibility) Altitude of highest signal(alt_highest_signal) Second lowest cloud base height(second_cbh) Backscatter sum(sum_backscatter) twpvceil25kC2.a1: Altitude of highest signal(alt_highest_signal) Flag indicating aeri retrieval status(status_flag) Backscatter sum(sum_backscatter) range(range) Warning and alarm status bits(status_string) Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity) Vertical visibility(vertical_visibility) Detection status. See details(detection_status) Third cloud base height(third_cbh) Aerosol backscatter coefficient at 355 nm(backscatter) Second lowest cloud base height(second_cbh)

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DQRID : D021212.11

Start Date	Start Time	End Date	End Time
11/06/2002	0000	12/09/2002	0000

Subject:	TWP/VCEIL/C3 - Degraded Sensitivity, Limited Range
DataStreams:	twpvceil25kC3.a1, twpvceil25kC3.b1
Description:	The Darwin ceilometer was displaying a cross-talk warning during this period. This causes degraded sensitivity and the inability of the ceilometer to identify cloud heights that are higher the about 2 km.
Measurements:	twpvceil25kC3.a1: Third cloud base height(third_cbh) Lowest cloud base height detected.(first_cbh) Second lowest cloud base height(second_cbh) Aerosol backscatter coefficient at 355 nm(backscatter) Vertical visibility(vertical_visibility) Altitude of highest signal(alt_highest_signal) twpvceil25kC3.b1: Lowest cloud base height detected.(first_cbh) Vertical visibility(vertical_visibility) Aerosol backscatter coefficient at 355 nm(backscatter) Second lowest cloud base height(second_cbh) Third cloud base height(third_cbh) Altitude of highest signal(alt_highest_signal)

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