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Dataset

 

GERB-1: Level 2b averaged rectified geolocated radiance and flux data (L2barg)

Status: Completed
Online Status: ONLINE
Publication State: Working
Publication Date:
Download Stats: last 12 months

Abstract

This dataset contains Level 2b averaged rectified geolocated radiance and flux data (L2barg) 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-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 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 2b ARG (Averaged, Rectified, Geolocated) top of atmosphere radiance and flux products are averaged over three interleaved SW (short wave) and TOT (total) 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 2b 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. (9999): GERB-1: Level 2b averaged rectified geolocated radiance and flux data (L2barg). Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/4f4159c6251d49bdbab07fea1e6ffbdb
Abbreviation: Not defined
Keywords: GERB, solar, thermal, radiation

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
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 CEDA 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 2 (MSG-2) or METEOSAT-9

Computation Element: 1

Title Meteosat Second Generation 2 (MSG-2) or METEOSAT-9
Abstract This computation involved: deployed on Meteosat Second Generation 2 (MSG-2) or METEOSAT-9.
Input Description None
Output Description None
Software Reference None
Output Description None

No variables found.

Coverage
Temporal Range
Start time:
2007-04-24T23:00:00
End time:
2013-01-18T00:00:00
Geographic Extent

 
60.0000°
 
-60.0000°
 
60.0000°
 
-60.0000°