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Obs4MIPs: Monthly-mean diurnal cycle of top of atmosphere outgoing longwave radiation from the GERB instrument (GERB-HR-ED01 rlut 1hrCM)

Update Frequency: Not Planned
Latest Data Update: 2020-09-17
Status: Ongoing
Online Status: ONLINE
Publication State: Citable
Publication Date: 2021-03-09
DOI Publication Date: 2021-04-29
Download Stats: last 12 months
Dataset Size: 6 Files | 427MB


This dataset contains top of atmosphere (TOA) outgoing longwave radiation from the Geostationary Earth Radiation Budget (GERB) instrument on board the Meteosat-9 geostationary satellite, for the period from May 2007 until 2012. In this dataset (labelled 'GERB-HR-ED01 rlut 1hrCM'), the data provided consist of monthly-mean diurnal cycles, with each day resolved into 1-hour means. Data are only available for six months of each year (January, May, June, July, November and December), due to operational constraints of the GERB instrument.

It has been produced in Obs4MIPs (Observations for Model Intercomparisons Project) format, as part of an activity to increase the use of GERB satellite observational data for the modelling and model analysis communities. This is not currently a standard GERB satellite instrument product, but does represent an effort on behalf of the GERB project team to identify a product that is appropriate for routine model evaluation. The data may have been reprocessed, reformatted, or created solely for comparisons with climate model output.

Citable as:  Bantges, R.J.; Russell, J.E.; Brindley, H.E. (2021): Obs4MIPs: Monthly-mean diurnal cycle of top of atmosphere outgoing longwave radiation from the GERB instrument (GERB-HR-ED01 rlut 1hrCM). Centre for Environmental Data Analysis, 29 April 2021. doi:10.5285/7aa17e66aaab4ece87064272b9f94e3a.
Abbreviation: Not defined
Keywords: Obs4MIPS, GERB, TOA outgoing long wave radiation


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
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:

Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).

Data Quality:
For information on the data quality see the associated technical note
File Format:
Data are in NetCDF format

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 Processing chain for the GERB-HR-ED01 rlut 1hrCM Obs4MIPS product
Abstract The GERB TOA outgoing longwave radiation (OLR) Obs4MIPs product has been generated from GERB level 2 HR OLR fluxes. There are three main stages. The first ingests the Edition 1 GERB HR OLR data and generates an area weighted flux product at 1° by 1° spatial resolution for every 15 minute time interval. In the second stage these data are averaged over time to produce an hourly averaged product. Each hour interval is defined as the time-centred mean at half-past the hour, e.g. 1030 UTC comprises of the mean of data from 1000 UTC, 1015 UTC, 1030 UTC and 1045 UTC (or from those slots in this window that are available). An hourly average is produced for a 1° by 1° grid cell if there is one or more observation from the four observation times available for that grid cell. The final processing stage averages the hourly mean fluxes over the days in the month to produce a one degree monthly mean product at hourly intervals. The number of data points (days per monthly hourly mean) contributing to each monthly mean are used to estimate the uncertainties associated with the product.
Input Description None
Output Description None
Software Reference None
Output Description


  • var_id: rlut
  • units: W m-2
  • standard_name: toa_outgoing_longwave_flux
  • long_name: TOA Outgoing Longwave Radiation
  • names: toa_outgoing_longwave_flux, TOA Outgoing Longwave Radiation
  • var_id: climatology_bnds
  • var_id: lat_bnds
  • var_id: lon_bnds

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: lat
  • long_name: Latitude
  • names: latitude, Latitude
  • units: degrees_east
  • standard_name: longitude
  • var_id: lon
  • long_name: Longitude
  • names: longitude, Longitude
  • long_name: time
  • standard_name: time
  • var_id: time
  • names: time
Temporal Range
Start time:
End time:
Geographic Extent