Data Quality Reports for Session: 100216 User: yasunaga Completed: 06/26/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020613.11TWP/VCEIL/C2 - Installationtwpvceil25kC2.00, twpvceil25kC2.a1, twpvceil25kC2.b1
D021025.2TWP/VCEIL/C2 - Nauru Vceil data suspecttwpvceil25kC2.a1, twpvceil25kC2.b1
D030527.8TWP/VCEIL/C2 - Power outage in I-Van resulted in Missing Datatwpvceil25kC2.00, twpvceil25kC2.a1, twpvceil25kC2.b1
D050310.1TWP/VCEIL/C2 - Ceilometer failuretwpvceil25kC2.00, twpvceil25kC2.b1
D051209.5TWP/VCEIL/C2 - occasional communication faulttwpvceil25kC2.b1
D060517.3TWP/VCEIL/C2 - Vceil computer disconnectedtwpvceil25kC2.b1
D990910.1Calibration interruption at TWP Naurutwpvceil25kC2.00, twpvceil25kC2.a1, twpvceil25kC2.b1


DQRID : D020613.11
Start DateStart TimeEnd DateEnd Time
10/28/199845511/19/19982359
Subject:
TWP/VCEIL/C2 - Installation
DataStreams:twpvceil25kC2.00, twpvceil25kC2.a1, twpvceil25kC2.b1
Description:
The Nauru ARCS was installed during the period September-November
1998.  Data were being collected by the end of October, but for the
first several weeks of November, the site was undergoing considerable
change, so data from that period should be used with caution.  The
official site dedication occured on November 20.  Most on-site
activity ended following the dedication so we will consider November
20 to be the beginning of the Nauru operations.  The last members of
the installation team left Nauru on November 24.
Measurements:twpvceil25kC2.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

twpvceil25kC2.b1:
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Warning and alarm status bits(status_string)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Vertical visibility(vertical_visibility)
  • 6 character string describing instrument measurement parameters(measurement_parameters)
  • north latitude for all the input platforms.(lat)
  • altitude above sea levelaltunits(alt)
  • Third cloud base height(third_cbh)
  • Lowest cloud base height detected.(first_cbh)
  • Time offset from base_time(base_time)
  • distance to center of range bin after correcting for offset in sync(range)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Time offset of tweaks from base_time(time_offset)
  • east longitude for all the input platforms.(lon)
  • Laser temperature(laser_temperature)
  • Altitude of highest signal(alt_highest_signal)
  • Second lowest cloud base height(second_cbh)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • GPS raw data filename(filename)
  • Detection status. See details(detection_status)
  • Flag indicating aeri retrieval status(status_flag)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • Millivolts at internal ADC input(window_contamination)
  • SUM of detected and normalized backscatter(sum_backscatter)

twpvceil25kC2.a1:
  • Flag indicating aeri retrieval status(status_flag)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • Millivolts at internal ADC input(window_contamination)
  • distance to center of range bin after correcting for offset in sync(range)
  • north latitude for all the input platforms.(lat)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Detection status. See details(detection_status)
  • 6 character string describing instrument measurement parameters(measurement_parameters)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • GPS raw data filename(filename)
  • east longitude for all the input platforms.(lon)
  • Time offset from base_time(base_time)
  • Lowest cloud base height detected.(first_cbh)
  • Laser temperature(laser_temperature)
  • Altitude of highest signal(alt_highest_signal)
  • SUM of detected and normalized backscatter(sum_backscatter)
  • Warning and alarm status bits(status_string)
  • Vertical visibility(vertical_visibility)
  • Time offset of tweaks from base_time(time_offset)
  • altitude above sea levelaltunits(alt)
  • Third cloud base height(third_cbh)
  • Second lowest cloud base height(second_cbh)


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DQRID : D021025.2
Start DateStart TimeEnd DateEnd Time
06/05/20021009/23/200210
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 volume backscattering 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)
  • distance to center of range bin after correcting for offset in sync(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)
  • SUM of detected and normalized backscatter(sum_backscatter)

twpvceil25kC2.a1:
  • Altitude of highest signal(alt_highest_signal)
  • Flag indicating aeri retrieval status(status_flag)
  • SUM of detected and normalized backscatter(sum_backscatter)
  • distance to center of range bin after correcting for offset in sync(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 volume backscattering coefficient at 355 nm(backscatter)
  • Second lowest cloud base height(second_cbh)


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DQRID : D030527.8
Start DateStart TimeEnd DateEnd Time
05/24/200323005/25/2003010
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:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

twpvceil25kC2.b1:
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Warning and alarm status bits(status_string)
  • east longitude for all the input platforms.(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)
  • north latitude for all the input platforms.(lat)
  • altitude above sea levelaltunits(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)
  • Time offset from base_time(base_time)
  • Lowest cloud base height detected.(first_cbh)
  • distance to center of range bin after correcting for offset in sync(range)
  • Millivolts at internal ADC input (0 to 2500)(background_light)

twpvceil25kC2.a1:
  • Flag indicating aeri retrieval status(status_flag)
  • east longitude for all the input platforms.(lon)
  • Time offset from base_time(base_time)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Laser temperature(laser_temperature)
  • Lowest cloud base height detected.(first_cbh)
  • Altitude of highest signal(alt_highest_signal)
  • SUM of detected and normalized backscatter(sum_backscatter)
  • Millivolts at internal ADC input(window_contamination)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • distance to center of range bin after correcting for offset in sync(range)
  • Warning and alarm status bits(status_string)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • north latitude for all the input platforms.(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)
  • altitude above sea levelaltunits(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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DQRID : D050310.1
Start DateStart TimeEnd DateEnd Time
02/26/20056004/01/200507
Subject:
TWP/VCEIL/C2 - Ceilometer failure
DataStreams:twpvceil25kC2.00, twpvceil25kC2.b1
Description:
Large data gaps began occurring frequently at the TWP Nauru site 26 February at 06Z.  
Prior to 25 February, optical cross talk errors had been observed.  Beginning on 25 February, 
data errors were observed.  By 26 February, these errors were exhibiting themselves as 
extended data gaps.  These gaps became increasingly frequent between 2/26 and 3/4.  All 
data are missing after 20050304.1550.

The instrument was replaced on 29 March and after some subsequent configuration work, the 
instrument was revived just after 00Z on 1 April.
Measurements:twpvceil25kC2.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

twpvceil25kC2.b1:
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Time offset of tweaks from base_time(time_offset)
  • Warning and alarm status bits(status_string)
  • east longitude for all the input platforms.(lon)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Vertical visibility(vertical_visibility)
  • Laser temperature(laser_temperature)
  • Altitude of highest signal(alt_highest_signal)
  • Second lowest cloud base height(second_cbh)
  • 6 character string describing instrument measurement parameters(measurement_parameters)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • GPS raw data filename(filename)
  • Detection status. See details(detection_status)
  • north latitude for all the input platforms.(lat)
  • altitude above sea levelaltunits(alt)
  • Flag indicating aeri retrieval status(status_flag)
  • Third cloud base height(third_cbh)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • Lowest cloud base height detected.(first_cbh)
  • Time offset from base_time(base_time)
  • distance to center of range bin after correcting for offset in sync(range)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Millivolts at internal ADC input(window_contamination)
  • SUM of detected and normalized backscatter(sum_backscatter)


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DQRID : D051209.5
Start DateStart TimeEnd DateEnd Time
08/30/200520012/12/2005346
Subject:
TWP/VCEIL/C2 - occasional communication fault
DataStreams:twpvceil25kC2.b1
Description:
Beginning August 30, 2005, the Nauru Ceilometer periodically went into a strange 
operational mode where the backscatter data exhibits vertical stripes.  Looking at the backscatter 
data - there are high amplitude oscillations occuring in the backscatter as a function 
of time at a given height.  The phenomenon appears to be more common at night.  Dates 
include: 30 Aug, 31 Aug, 1 Sep, 9 Sep, 15 Sep, 20 Oct, 22 Oct, 8 Dec, and others.

The fiber optic link to the ceilometer was faulty and causing periodic data corruption. 
The problem was corrected when the fiber optic line was replaced with a hard wired RS232 
link.
Measurements:twpvceil25kC2.b1:
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Flag indicating aeri retrieval status(status_flag)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • Third cloud base height(third_cbh)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
  • Lowest cloud base height detected.(first_cbh)
  • Warning and alarm status bits(status_string)
  • distance to center of range bin after correcting for offset in sync(range)
  • east longitude for all the input platforms.(lon)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Vertical visibility(vertical_visibility)
  • 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)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • Detection status. See details(detection_status)
  • north latitude for all the input platforms.(lat)
  • altitude above sea levelaltunits(alt)
  • Millivolts at internal ADC input(window_contamination)
  • SUM of detected and normalized backscatter(sum_backscatter)


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DQRID : D060517.3
Start DateStart TimeEnd DateEnd Time
05/13/2006224905/15/2006410
Subject:
TWP/VCEIL/C2 - Vceil computer disconnected
DataStreams:twpvceil25kC2.b1
Description:
VCEIL computer was disconnected during this time period.
Measurements:twpvceil25kC2.b1:
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Flag indicating aeri retrieval status(status_flag)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • Third cloud base height(third_cbh)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
  • Lowest cloud base height detected.(first_cbh)
  • Warning and alarm status bits(status_string)
  • distance to center of range bin after correcting for offset in sync(range)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Vertical visibility(vertical_visibility)
  • 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)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • Detection status. See details(detection_status)
  • Millivolts at internal ADC input(window_contamination)
  • SUM of detected and normalized backscatter(sum_backscatter)


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DQRID : D990910.1
Start DateStart TimeEnd DateEnd Time
08/10/199942508/10/1999450
Subject:
Calibration interruption at TWP Nauru
DataStreams:twpvceil25kC2.00, twpvceil25kC2.a1, twpvceil25kC2.b1
Description:
The ceilometer was tipped horizontal for a calibration check
Measurements:twpvceil25kC2.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

twpvceil25kC2.b1:
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Warning and alarm status bits(status_string)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Vertical visibility(vertical_visibility)
  • 6 character string describing instrument measurement parameters(measurement_parameters)
  • north latitude for all the input platforms.(lat)
  • altitude above sea levelaltunits(alt)
  • Third cloud base height(third_cbh)
  • Lowest cloud base height detected.(first_cbh)
  • Time offset from base_time(base_time)
  • distance to center of range bin after correcting for offset in sync(range)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Time offset of tweaks from base_time(time_offset)
  • east longitude for all the input platforms.(lon)
  • Laser temperature(laser_temperature)
  • Altitude of highest signal(alt_highest_signal)
  • Second lowest cloud base height(second_cbh)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • GPS raw data filename(filename)
  • Detection status. See details(detection_status)
  • Flag indicating aeri retrieval status(status_flag)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • Millivolts at internal ADC input(window_contamination)
  • SUM of detected and normalized backscatter(sum_backscatter)

twpvceil25kC2.a1:
  • Flag indicating aeri retrieval status(status_flag)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Degrees from vertical (-15 to +90)(tilt_angle)
  • Millivolts at internal ADC input(window_contamination)
  • distance to center of range bin after correcting for offset in sync(range)
  • north latitude for all the input platforms.(lat)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Detection status. See details(detection_status)
  • 6 character string describing instrument measurement parameters(measurement_parameters)
  • Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
  • GPS raw data filename(filename)
  • east longitude for all the input platforms.(lon)
  • Time offset from base_time(base_time)
  • Lowest cloud base height detected.(first_cbh)
  • Laser temperature(laser_temperature)
  • Altitude of highest signal(alt_highest_signal)
  • SUM of detected and normalized backscatter(sum_backscatter)
  • Warning and alarm status bits(status_string)
  • Vertical visibility(vertical_visibility)
  • Time offset of tweaks from base_time(time_offset)
  • altitude above sea levelaltunits(alt)
  • Third cloud base height(third_cbh)
  • Second lowest cloud base height(second_cbh)


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END OF DATA