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Latest news

Sep 2012: GERB-1 Edition 1 L2 ARG data up to Jul 2012 now available via the BADC.

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 updated 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:

Level 2 products

The Level 2 ARG Edition 1 data quality summary should be read by all users of Edition 1 Level 2 products.

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

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
SEVIRI header data is used as an additional input to the Level 1.5 processing, to provide MSG orbit and attitude data necessary for geolocation.

GGSPS Publications

From the Proceedings of the 2004 EUMETSAT Meteorological Satellite Conference:

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.



Last updated 14th Sep 2012
ggsps@stfc.ac.uk