NERC Data Catalogue Service
905 nm Vaisala CT75K Lidar Ceilometer Data from the Chilbolton Facility for Atmospheric and Radio Research (CFARR) site, Hampshire, England, 1996 - present
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. 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.
This dataset incorporates the earlier published and citable 1996 - 2013 collection of lidar data, but continues this dataset to present
Default
Identification info
- Metadata Language
- English (en)
- Dataset Reference Date ()
- 2015-03-25T19:38:02
- Dataset Reference Date ()
- 2015-03-25T19:38:02
- Identifier
- NCAS British Atmospheric Data Centre (NCAS BADC) / 5e878b3b9e584bccbc71b2e5094acfdb
- Maintenance and update frequency
- continual
- Update scope
- dataset
- Keywords
-
- clouds
- lidar
- ceilometer
- infrared
- elastic backscattering
- precipitation
- cloud base
- GEMET - INSPIRE themes, version 1.0 ()
-
- atmospheric conditions
- Limitations on Public Access
- otherRestrictions
- Other constraints
- Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
- Use constraints
- otherRestrictions
- Spatial representation type
- grid
- Topic category
-
- Climatology, meteorology, atmosphere
))
- Begin date
- 1996-09-12T23:00:00
- Code
- WGS 84
Distribution Information
- Data format
-
-
Data are netCDF formatted
()
-
Data are netCDF formatted
()
- Resource Locator
-
CEDA Data Catalogue Page
Detail and access information for the resource
- Resource Locator
-
DOWNLOAD
Download Data
- Resource Locator
-
CEDA Data Catalogue Page
Detail and access information for the resource
- Resource Locator
-
DOWNLOAD
Download Data
- Quality Scope
- dataset
Report
- Dataset Reference Date ()
- 2010-12-08
- Statement
- Data are 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 are then deposited at the BADC for ingestion into the BADC archives.
Metadata
- File identifier
- 5e878b3b9e584bccbc71b2e5094acfdb XML
- Metadata Language
- English (en)
- Character set
- 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
- Parent identifier
- Chilbolton Facility for Atmospheric and Radio Research (CFARR): surface, radar and lidar measurements (1998-present) 7cbc3fc19bfa037a48ba4cba4b93544d
- Resource type
- dataset
- Metadata Date
- 2024-07-25T11:23:35
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
