Latest news

Apr 2018: forthcoming data announcement. GERB monthly diurnal cycle products for Obs4MIPS will be released soon. This presentation poster from the European Geosciences Union 2018 meeting describes the product.

Mar 2018: GERB-1 and 2 Edition 1 L2 HR data now available via the NEODC / CEDA web site. Updated quality documents are also available.

Mar 2018: Filled HR products have been used in model comparison, providing insights into the diurnal cycle of Earth outgoing radiation. See ACPD discussion paper, Jan 2018. (doi:10.5194/acp-2017-1144)

Sep 2012: GERB-1 Edition 1 L2 ARG data up to Jul 2012 now available via the NEODC / CEDA web site.

Feb 2011: users of GERB-2 Edition 1 products should apply a post-processing Short Wave calibration update. Users should multiply GERB-2 Edition 1 Short Wave values by 0.976. Further details are available in the 2011 update of the Quality Summary.

Product information

The Level 1.5 and Level 2 products are written as HDF5 files. For further information on HDF5 and the Hierarchical Data Format, follow the link to the HDF home page from our Links page.

Overview of the GERB Edition data sets available to Authorised Users

A number of products with known defects have been excluded from the Edition 1 dataset. See:

• The full list of excluded GERB-1 L15N and L20_ARG products;
• The full list of excluded GERB-2 L15N and L20_ARG products

Level 2 products

The quality summary documents should be read by all users of Level 2 products.

Latest released dataset documents: 2018 Edition 1 release of Level 2 HR and ARG products.

• The Level 2 Edition 1 HR and ARG Quality Summary (doc date Mar 2017)
• The Level 2 Edition 1 Processing and Accuracy Summary is also available. This information was originally part of the overall quality summary and has now been separated into a standalone document.
• The Level 2 ARG Edition 1 Validation Report has also been separated from the original quality summary document. This information was prepared for the original Edition 1 ARG product release and has not yet been updated, therefore does not include reference to the required user-applied correction.

The RMIB Level 2 products user guide gives details of product format and contents.

Older Level 2 quality documents

The 2011 Level 2 ARG Edition 1 data quality summary is kept here for historical reference.

Level 1.5 products

The Level 1.5 NANRG Edition 1 data quality summary should be read by all users of the Edition 1 Level 1.5 NANRG product.

The GGSPS Products User Guide describes the data format and contents of the Level 1.5 NANRG (Non-Averaged, Non-Rectified, Geolocated) product.

Calibration data

GERB-2

Update, Feb 2011: Users should multiply GERB-2 Edition 1 Short Wave values by 0.976. Further details are available in the updated Quality Summary.

A parameter file description for GERB-2 provides details of calibration tables and access to the versions currently used by the GGSPS.

GERB-2 instrument spectral response

The spectral reponse files available here are the values used in generation of the Edition 1 data set. These are averages over all pixels. The spectral response is used in unfiltering the data during Level 2 processing by RMIB.

Long-wave

Short-wave

Total

GERB-1

A parameter file description for GERB-1 provides details of calibration tables and access to the versions currently used by the GGSPS.

GGSPS processing and products

The GGSPS receives raw GERB data packets and processes the data into science products 24 hours per day, in Near-Real Time (NRT). The MSG satellite transmits GERB data to the MSG ground station at EUMETSAT. From EUMETSAT the GERB packets are transmitted over a network link to the GGSPS. The GGSPS receives a GERB packet every 0.6 seconds, and combines these packets into GERB Level 0 files spanning one instrument scan (in NORMAL mode). These Level 0 files form the input to the GGSPS science processing.

The principal outputs are the Level 1.5 ARG (Averaged, Rectified, Geolocated) radiance product and the L2, 15 minute, products from RMIB (the Royal Meteorological Institute of Belgium). L2 monthly mean fluxes will be generated from the RMIB L2 products. The GGSPS also generates a L1.5 NANRG (Non Averaged, Non Rectified, Geolocated) radiance product (principally for the RMIB).

Starting from the raw GERB data, the GGSPS

• creates GERB Level 0 product files (1 file per instrument scan)
• processes GERB Level 0 data to Level 1.5 (ARG and NANRG 15-minute products) and 2.5 minute engineering products
• copies the L1.5 NANRG product to RMIB in quick-look time (i.e. within 4 hours of measurement by GERB)
• RMIB use the L1.5 NANRG product in the generation of the L2 15 minute average flux products, which are forwarded to the GGSPS
• once daily, the GGSPS produces a 24 hour Engineering Report and updates a monthly Engineering Trend product, used as inputs to the production of Engineering Plots
• archives all of the above products

GGSPS Publications

From the Proceedings of the 2004 EUMETSAT Meteorological Satellite Conference:

• The GERB Ground Segment Processing System (GGSPS), (PDF document) A. Smith and co-authors.
• Geolocation accuracy of GERB data, (PDF document) M.Bates and co-authors.

Ops team info

Ops Team information page (GOT only)

Instrument status

Updated automatically, shows current instrument parameters from the latest available Level 0 data.

GERB-2 instrument status.

GERB-1 instrument status.

GERB-3 instrument status.

GERB-4 instrument status.