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Dataset

 

GERB-2: Level 2 averaged rectified geolocated radiance and flux data (L2arg)

Status: Ongoing
Online Status: ONLINE
Publication State: Citable
Publication Date: 2007-03-05
DOI Publication Date: 2020-05-13
Download Stats: last 12 months

Abstract

This dataset contains Level 2 averaged rectified geolocated radiance and flux data (L2arg) taken at 17 minute time resolution. Each grid point is a 3 GERB scan average weighted by the instrument point spread function.

The Geostationary Earth Radiation Budget (GERB) instrument makes accurate broadband measurements of earth leaving radiances from the geostationary METOSAT Second Generation satellites from which the emitted thermal and reflected solar components of the Earth Radiation Budget are derived. These data are available at high time resolution for the portion of the globe observable from a METEOSAT geostationary orbit above 0, 0. These data are ideal for studying fast variation in the radiation budget such as those associated with changing cloud conditions, aerosol events and the diurnal cycle. GERB 2 (METEOSAT-8) record covers the period March 2004 to April 2007. GERB 1 (METEOSAT-9) record covers the period May 2007 to January 2013.

Users must read the quality summary associated with these data and will find details of user applied correction that are recommended to be applied to these datasets before using. Please also cite Harries et al., 2005: The Geostationary Earth Radiation Budget Project, Bull. Amer. Meteorol. Soc., Vol. 86, 945-960, doi: 10.1175/BAMS-86-7-945.

The level 2 ARG (Averaged, Rectified, Geolocated) top of atmosphere radiance and flux products are averaged over three interleaved SW and TOT GERB scans. They are provided interpolated to a fixed rectified equal viewing angle grid and averaged resulting in a product with a temporal resolution of around 17 minutes. Times contained in the level 2 ARG product names indicate the nominal start of the integration period. North-south and east-west grid spacing is around 0.07° in viewing angle giving a spatial resolution of approximately 45 km at nadir. Whilst the radiances and fluxes are corrected for the spectral imperfections of the instrument, no correction is made for spatial non-uniformities in the instrument field of view response. Thus each ARG grid point is a weighted average of the observed scenes with the weighting determined by the instrument field of view response or Point Spread Function (PSF).

Citable as:  EUMETSAT; Harries, J.E. (2020): GERB-2: Level 2 averaged rectified geolocated radiance and flux data (L2arg). NERC Earth Observation Data Centre, 13 May 2020. doi:10.5285/3240ab591b6d3c2ef5269b5b14afe4f3. http://dx.doi.org/10.5285/3240ab591b6d3c2ef5269b5b14afe4f3
Abbreviation: Not defined
Keywords: GERB, solar, thermal, radiation

Details

Previous Info:
No news update for this record
Previously used record identifiers:
http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__dep_11731359365916511
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data collected by the GERB instrument onboard the Meteosat Second Generation satellite operated by European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), then the data processed at RMIB (Royal Meteorological Institute of Belgium) then sent to NCAS-BADC by the GERB team at Imperial College and RAL (Rutherford Appleton Laboratory).

Data Quality:
Users must read the quality summary associated with these data and will find details of user applied correction that are recommended to be applied to these datasets before using.
File Format:
Data are HDF formatted

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Meteosat Second Generation 1 (MSG-1) or METEOSAT-8

Computation Element: 1

Title Meteosat Second Generation 1 (MSG-1) or METEOSAT-8
Abstract Deployed on Meteosat Second Generation 1 (MSG-1) or METEOSAT-8.
Input Description None
Output Description None
Software Reference None
Output Description None
  • long_name: Longwave Radiation
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0482
  • gcmd_keyword: Longwave Radiation
  • names: Longwave Radiation, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0482
  • long_name: Shortwave Radiation
  • gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0755
  • gcmd_keyword: Shortwave Radiation
  • names: Shortwave Radiation, http://vocab.ndg.nerc.ac.uk/term/P141/4/GVAR0755

Co-ordinate Variables

Coverage
Temporal Range
Start time:
2004-03-28T00:00:00
End time:
2007-05-10T23:00:00
Geographic Extent

 
60.0000°
 
-60.0000°
 
60.0000°
 
-60.0000°