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NCAVEO: Atmospheric water data profile version 1.0, collected using an UV Raman LiDAR at Chilbolton Facility for Atmospheric and Radio research

Update Frequency: Not Planned
Latest Data Update: 2008-08-20
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2008-09-26
Download Stats: last 12 months
Dataset Size: 10 Files | 6MB


An atmospheric water vapour profile was recorded using a UV Raman LiDAR located at Chilbolton Facility for Atmospheric and Radio Research (CFARR), during the Network for Calibration and Validation of EO data (NCAVEO) 2006 Experiment. The profile was recorded on 16th June 2006, one day before the ‘golden day’. The ground-based Raman LiDAR system at the CFARR transmits a high power Nd:YAG pulse laser beam vertically into the atmosphere at 355 nm wavelength. The LiDAR measures both elastic backscattering and water vapour profiles in the troposphere. Inelastic scattering of the laser radiation by molecules in the atmosphere, termed Raman scattering, is used to determine the atmospheric water vapour and temperature profiles. This dataset contains data for the raw (20s/7.5m) and processed (5min/22.5m) data in separate files. For further information on the parameters used during the data collection and the data's file format please see the dataset's metadata document in linked documentation.

Citable as:  Network for Calibration and Validation of EO data (2008): NCAVEO: Atmospheric water data profile version 1.0, collected using an UV Raman LiDAR at Chilbolton Facility for Atmospheric and Radio research. NERC Earth Observation Data Centre, date of citation.
Abbreviation: Not defined


Previous Info:
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Previously used record identifiers:
Access rules:
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Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

These data were provided to NEODC by university of Southampton, who carried out work to convert formats to NASA-Ames, and write metadata documents. The metadata documents describing the processing are archived alongside the data as PDF files.

Data Quality:
Mostly unknown, but some quality statements are provided in metadata files archived alongside the data.
File Format:
Raw and processed data are in separate NetCDF files, accessible using HDFView, a visual software tool that can be freely downloaded from 2 images providing quick examples of the data are also available in JPG format.

Related Documents

 Metadata PDF

Process overview

This dataset was generated by instruments deployed on platforms as listed below.

Instrument/Platform pairings

UV Raman LiDAR Deployed on: Chilbolton Atmospheric Observatory (CAO)
Output Description


  • units: nm
  • long_name: 1st received wavelength of lidar (water vapour Raman scattering)
  • var_id: receive_wavelength_1
  • units: nm
  • long_name: 2nd received wavelength of lidar (nitrogen Raman scattering)
  • var_id: receive_wavelength_2
  • units: m
  • long_name: Diameter of receiver mirror of lidar
  • var_id: lidar_mirror_diameter
  • units: m
  • long_name: Diameter of transmitted laser beam at lidar system
  • var_id: lidar_beam_diameter
  • units: degree
  • long_name: Divergence of transmitted laser beam
  • var_id: lidar_beam_divergence
  • units: degree
  • long_name: Elevation of lidar beam with respect to horizontal surface
  • var_id: lidar_beam_elevation
  • units: degree
  • long_name: Field of view of lidar receiver
  • var_id: lidar_field_of_view
  • units: m
  • long_name: Height of lidar above mean sea level (Ordnance Survey Great Britain)
  • var_id: lidar_height_amsl
  • units: m
  • long_name: Height of measurement with respect to lidar system
  • standard_name: height
  • var_id: height
  • units: Hz
  • long_name: Laser pulse repetition rate
  • var_id: lidar_pulse_frequency
  • units: m-1sr-1
  • long_name: Lidar backscattering coefficient attenuated by molecular and aerosol scattering
  • var_id: atten_lidar_backscatter_coeff
  • standard_name: humidity_mixing_ratio
  • long_name: Mass mixing ratio of water vapour
  • var_id: humidity_mixing_ratio
  • units:
  • units: J
  • long_name: Nominal laser pulse energy
  • var_id: lidar_pulse_energy
  • units: nm
  • var_id: receive_wavelength_1
  • long_name: Received wavelength of lidar (elastic backscatter)
  • units: seconds
  • long_name: Total acquisition time for single profile
  • var_id: acquisition_time
  • units: nm
  • long_name: Transmitted wavelength of lidar
  • var_id: transmit_wavelength

Co-ordinate Variables

  • units: degree_north
  • standard_name: latitude
  • var_id: latitude
  • long_name: Latitude coordinate of the lidar
  • units: degree_east
  • standard_name: longitude
  • var_id: longitude
  • long_name: Longitude coordinate of the lidar
  • standard_name: time
  • var_id: time
  • long_name: Time at end of acquisition period
  • standard_name: time
  • var_id: time
  • long_name: Time at start of acquisition period
Temporal Range
Start time:
End time:
Geographic Extent