Data Quality Reports for Session: 123852 User: dmfoper Completed: 10/20/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D021025.2TWP/VCEIL/C2 - Nauru Vceil data suspecttwpvceil25kC2.a1, twpvceil25kC2.b1
D021212.11TWP/VCEIL/C3 - Degraded Sensitivity, Limited Rangetwpvceil25kC3.a1, twpvceil25kC3.b1
D030527.8TWP/VCEIL/C2 - Power outage in I-Van resulted in Missing Datatwpvceil25kC2.00, twpvceil25kC2.a1, twpvceil25kC2.b1


DQRID : D021025.2
Start DateStart TimeEnd DateEnd Time
06/05/2002010009/23/20020100
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 DateStart TimeEnd DateEnd Time
11/06/2002000012/09/20020000
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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DQRID : D030527.8
Start DateStart TimeEnd DateEnd Time
05/24/2003230005/25/20030010
Subject:
TWP/VCEIL/C2 - Power outage in I-Van resulted in Missing Data
DataStreams:twpvceil25kC2.00, twpvceil25kC2.a1, twpvceil25kC2.b1
Description:
I forgot to put in the daily report that we took the I van down yesterday to replace the 
fans in the Clary UPS. This was from 2300z on 24May03 to 0010z on 25May03. Instruments 
affected :

MPL
Ceilometer
MWR
WSI
TSI

Rex
Measurements:twpvceil25kC2.00:
  • null(Raw data stream - documentation not supported)
twpvceil25kC2.b1:
  • Aerosol backscatter coefficient at 355 nm(backscatter)
  • Warning and alarm status bits(status_string)
  • lon(lon)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Laser temperature(laser_temperature)
  • Altitude of highest signal(alt_highest_signal)
  • 6 character string describing instrument measurement parameters(measurement_parameters)
  • Second lowest cloud base height(second_cbh)
  • GPS raw data filename(filename)
  • Detection status. See details(detection_status)
  • lat(lat)
  • Dummy altitude for Zeb(alt)
  • Flag indicating aeri retrieval status(status_flag)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • Third cloud base height(third_cbh)
  • base time(base_time)
  • Lowest cloud base height detected.(first_cbh)
  • range(range)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
twpvceil25kC2.a1:
  • Flag indicating aeri retrieval status(status_flag)
  • lon(lon)
  • base time(base_time)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Aerosol backscatter coefficient at 355 nm(backscatter)
  • Laser temperature(laser_temperature)
  • Lowest cloud base height detected.(first_cbh)
  • Altitude of highest signal(alt_highest_signal)
  • Backscatter sum(sum_backscatter)
  • Millivolts at internal ADC input(window_contamination)
  • Degrees from vertical (0 to +90)(tilt_angle)
  • range(range)
  • Warning and alarm status bits(status_string)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • lat(lat)
  • Vertical visibility(vertical_visibility)
  • Detection status. See details(detection_status)
  • Time offset of tweaks from base_time(time_offset)
  • 6 character string describing instrument measurement parameters(measurement_parameters)
  • Dummy altitude for Zeb(alt)
  • Third cloud base height(third_cbh)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • Second lowest cloud base height(second_cbh)
  • GPS raw data filename(filename)

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