905 nm Vaisala CT75K Lidar Ceilometer Data from the Chilbolton Facility for Atmospheric and Radio Research (CFARR) site, Hampshire, England, 1996- 2013
The Chilbolton Observatory, Hampshire, have had a Vaisala CT75K lidar ceilometer deployed since 13th September 1996. This dataset contains measurements of the range of first, second, and third cloud base from the lidar and attenuated backscatter coefficients of aerosols within the atmosphere from 1996 to 2013. Plots of the attenuated backscatter coefficient at different heights are also available.
The instrument has been regularly calibrated using the method described by O'Connor, Ewan J., Anthony J. Illingworth, Robin J. Hogan, 2004: A Technique for Auto-calibration of Cloud Lidar. J. Atmos. Oceanic Technol., 21, 777–786. doi: http://dx.doi.org/10.1175/1520-0426(2004 )021<0777:ATFAOC>2.0.CO;2 .
Prior to April 2014 this technique had been applied manually, but from 2014 this was automated to provide a routine, automated application of O'Connor et al's calibration technique. This also highlighted an instrument calibration drift not previously spotted in earlier data and so a corrected data have been added to the archive for the following periods (denoted by "_cor1" in the filename): 1st July 2003 – 31st December 2003, January 2006 to December 2012 and February and March 2013. Users should see the data quality notes for further details.
For post 2013 data please refer to the "all-years" dataset.
Simple
- Date (Publication)
- 2003-09-14T08:36:22
- Date (Creation)
- 2003-09-14T08:36:22
- Identifier
- NCAS British Atmospheric Data Centre (NCAS BADC) / b7824e040083c8135bcf4aebeb00c922
- Identifier
- doi / http://dx.doi.org/10.5285/1aa2df5a-798b-46c7-b74a-421f9ca0aa82
- Maintenance and update frequency
- notPlanned Not planned
- Update scope
- dataset Dataset
- Keywords
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- clouds
- lidar
- ceilometer
- infrared
- elastic backscattering
- precipitation
- cloud base
- GEMET - INSPIRE themes, version 1.0
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- atmospheric conditions
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- Access to these data is available to any registered CEDA user. Please Login or Register for a CEDA account to gain access.
- Use constraints
- otherRestrictions Other restrictions
- Spatial representation type
- grid Grid
- Metadata language
- EnglishEnglish
- Topic category
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- Climatology, meteorology, atmosphere
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- Begin date
- 1996-09-12T23:00:00
- End date
- 2013-12-31T23:59:59
- Unique resource identifier
- WGS 84
- Distribution format
-
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Data are netCDF formatted
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Data are netCDF formatted
()
- OnLine resource
-
CEDA Data Catalogue Page
Detail and access information for the resource
- OnLine resource
-
DOWNLOAD
Download Data
- Hierarchy level
- dataset Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
- Data were recorded continuously by the instrument at the Chilbolton site before post-processing using signals from optically thick strato-cumulus clouds to calibrate according to the method described by O'Connor, Ewan J., Anthony J. Illingworth, Robin J. Hogan, 2004: A Technique for Auto-calibration of Cloud Lidar. J. Atmos. Oceanic Technol., 21, 777–786. doi: http://dx.doi.org/10.1175/1520-0426(2004 )021<0777:ATFAOC>2.0.CO;2. The data were then deposited at the BADC for ingestion into the BADC archives.
- File identifier
- b7824e040083c8135bcf4aebeb00c922 XML
- Metadata language
- EnglishEnglish
- Character set
- 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF8
- Parent identifier
- Chilbolton Facility for Atmospheric and Radio Research (CFARR): surface, radar and lidar measurements (1998-present) 7cbc3fc19bfa037a48ba4cba4b93544d
- Hierarchy level
- dataset Dataset
- Date stamp
- 2025-04-02T02:25:10
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
Overviews
Spatial extent
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