Meteosat

The Meteosat series of satellites are geostationary meteorological satellites operated by EUMETSAT under the Meteosat Transition Programme (MTP) and the Meteosat Second Generation (MSG) program.

Meteosat First Generation satellite

The MTP program was established to ensure the operational continuity between the end of the successful Meteosat Operational Programme in 1995 and Meteosat Second Generation (MSG), which came into operation at the start of 2004 using improved satellites. The MSG program will provide service until the MTG (Meteosat Third Generation) program takes over.

First generation
Satellites in the first generation Meteosat series[1]
Satellite Launch date Mission end
Meteosat-1 23 November 1977 Imager failed in November 1979; data collection ended in 1984
Meteosat-2 10 June 1981 Moved to graveyard orbit in December 1991[2]
Meteosat-3 (Meteosat-P2) 15 June 1988 Retired in 1995
Meteosat-4 (MOP-1) 19 April 1989 Deactivated in November 1996.
Meteosat-5 (MOP-2) 02 March 1991 Decommissioned and placed into graveyard orbit in February 2007
Meteosat-6 (MOP-3) 20 November 1993 Continued data transmission service until late 2010 or in early 2011
Meteosat-7 (MTP) 03 September 1997 Placed into graveyard orbit in April 2017[3]

The first generation of Meteosat satellites, Meteosat-1 to Meteosat-7, provided continuous and reliable meteorological observations from space to a large user community. Meteosat-1 to -7 have all now retired.

When operational, the Meteosat First Generation provided images every half-hour in three spectral channels (Visible, Infrared) and Water Vapour, via the Meteosat Visible and Infrared Imager (MVIRI) instrument. Until 1 February 2017, Meteosat-7 provided the primary imagery coverage over the Indian Ocean and provided a service relaying data from Argos Data Collection Platforms (DCP), such as buoys, in support of the Tsunami Warning System for the Indian Ocean. A range of processed meteorological products were also produced.[4] The last disseminated Meteosat-7 image was on 31 March 2017. Moving Meteosat-7 to its ultimate resting place in a graveyard orbit commenced on 3 April 2017 and the spacecraft final command sent on 11 April 2017.

The satellites were manufactured by a consortium COSMOS, with Aérospatiale in its Cannes Mandelieu Space Centre, as Prime, and included Matra, MBB, Selenia Spazio, Marconi Company.

They are 2.1 metres in diameter and 3.195 metres long. Its initial mass in orbit is 282 kg, and in orbit, the satellite spins at 100 rpm around its main axis.[5]

Second Generation ("MSG")
Meteosat Second Generation
Satellites in the second generation Meteosat series[6]
Satellite Launch date Mission end
Meteosat-8 (MSG-1) 28-08-2002 22:45 UTC Retired 1 July 2022
Meteosat-9 (MSG-2) 22-12-2005 22:33 UTC Availability lifetime is until 2025
Meteosat-10 (MSG-3) 05-07-2012 21:36 UTC Availability lifetime is until 2030
Meteosat-11 (MSG-4) 15-07-2015 21:05 UTC Availability lifetime is until 2033

The contract for the second generation was awarded to Aérospatiale in its Cannes Mandelieu Space Centre (now Thales Alenia Space), with main subcontractors as Matra, Messerschmitt, Alenia.

Meteosat Second Generation was designed in response to user requirements to serve the needs of nowcasting applications and numerical weather prediction. In addition, the GERB instrument provides important data for climate monitoring and research.

The satellites are spin-stabilised like the previous generation, but with many design improvements. The more frequent and comprehensive data collected by MSG also aids the weather forecaster in the swift recognition and prediction of dangerous weather phenomena such as thunderstorms, fog, and explosive development of small, but intense, depressions, which can lead to devastating wind storms.

The MSG satellites are 3.2 m in diameter and 2.4 m high and spin anti-clockwise at 100 rpm[7] at an altitude of 36,000 km.[8]

On 29 January 2004 the first Meteosat Second Generation satellite MSG-1, renamed to Meteosat-8 once operational, commenced routine operations. In addition to the main optical payload SEVIRI (Spinning Enhanced Visible and Infrared Imager), Meteosat-8 also carries the secondary payload GERB (Geostationary Earth Radiation Budget) instrument.

The launch of MSG-2 (renamed to Meteosat-9) took place on 21 December 2005. The launch of MSG-3 (renamed to Meteosat-10) took place on 5 July 2012.

The MSG control centre in Darmstadt

Meteosat-8 is stationed over the Indian Ocean, arriving at 41.5°E on 21 September 2016 and it took over as prime Indian Ocean Data Coverage (IODC) spacecraft on 1 February 2017 (replacing Meteosat-7). Meteosat-8 was retired from operational service on 1 July 2022 and finally decommissioned on 13 October 2022 after twenty years in orbit. The spacecraft was disposed of in compliance with ISO-24113 guidelines (although not designed with this in mind) having been raised 740km above the geostationary ring and spun down to 20rpm. The propulsion system was then passivated and the satellite deactivated.

Meteosat-9 is also stationed over the Indian Ocean, arriving at 45.5°E on 20 April 2022 and it took over as prime IODC spacecraft on 1 June 2022 (replacing Meteosat-8).

Meteosat-10 and -11 are located over Africa with various differences in operational configuration. Since 20 March 2018, Meteosat-10 provides an operational European 'rapid scan' mode service (the MSG RSS service first commenced in May 2008), with images of Europe every 5 minutes. Since 20 February 2018, Meteosat-11 provides the main full Earth imagery service over Europe and Africa (with images every 15-minutes).[9]

MSG-4 was successfully launched into space on 15 July 2015 at 18:42 local time on top an Ariane 5 Rocket from the Guiana Space Centre in Kourou, French Guiana. Like MSG-1, MSG-2 and MSG-3, MSG-4 was launched by Arianespace. The MSG-4 commissioning was successfully completed in December 2015 at which time the spacecraft was placed into in-orbit storage as planned, and renamed to Meteosat-11.

Secondary Payloads

Meteosat-8, -9, -10, and -11 each carry a GERB Instrument, DCP capable service equipment and a Search and Rescue signal Processor (SARP) that is capable of detecting 406 MHz distress signals from emergency position-indicating radiobeacon stations.[10] For SARP, see more under Cospas-Sarsat.

Third Generation ("MTG")
Artist's rendering of Meteosat Third Generation
Satellites in the third generation Meteosat series[11]
Satellite Launch date Mission end
Meteosat-12 (MTG-I1) 13-12-2022 20:30 UTC TBD

Considering the long development cycle for a new observational space system, EUMETSAT has been working on the definition and the planning for a Meteosat Third Generation (MTG) system since the year 2000. MTG components providing continuity of MSG services need to be available before the end of the nominal lifetime of MSG. MTG preparatory activities started end of 2000 in cooperation with the European Space Agency (ESA), following the decision of the EUMETSAT Council to proceed with a Post-MSG User Consultation Process. The process is aimed at capturing the foreseeable needs of users of EUMETSAT's satellite data in the 2015-2025 timeframe.[12]

On 19 March 2010, ESA chose Thales Alenia Space for a final negotiation leading to a contract to be signed during June.[13]

On 22 June 2010, EUMETSAT confirmed the choice of Thales Alenia Space.[14]

On 24 February 2012, the development contract between ESA and Thales Alenia Space was signed by Mr. Liebig and Mr. Seznec. Thales Alenia Space leads the industrial consortium that is now building the MTG family. Along with being the prime contractor, Thales Alenia Space is responsible for the MTG-I imaging satellite, including the primary payload, the Flexible Combined Imager. Bremen-based OHB is responsible for the MTG-S satellites and provision of the common satellite platforms, supported by Astrium GmbH as the System Architect.

A total of 6 satellites are being developed under the MTG contract. Four MTG-I imaging satellites, as well as two MTG-S sounder satellites. The launch of the first MTG satellite, Meteosat-12 (MTG-I1), occurred on 13 December 2022, at 20:30 UTC.[15][16]

References
  • EUMETSAT
  • "Perfect day for weather satellite". BBC News. December 21, 2005. Retrieved February 6, 2006.
  • Krige, John. "Crossing the Interface from R&D to Operational Use: The Case of the European Meteorological Satellite," Technology and Culture, Volume 41, Number 1, January 2000, pp. 27–50.
  1. "Meteosat First Generation - eoPortal Directory - Satellite Missions".
  2. "Meteosat" (PDF). Archived (PDF) from the original on 2021-07-03. Retrieved 2021-07-03.
  3. "The final journey of Meteosat-7 — EUMETSAT". Archived from the original on 2017-06-13. Retrieved 2019-04-02.
  4. "Indian Ocean Data Coverage service". Archived from the original on 2017-12-01. Retrieved 2018-11-29.
  5. "Meteosat First Generation Design". Archived from the original on 2016-03-18. Retrieved 2016-03-18.
  6. "Meteosat- EUMETSAT". Archived from the original on 2013-10-17.
  7. Meteosat Second Generation Design
  8. "EUMETSAT Satellite Orbits". Archived from the original on 2016-03-09. Retrieved 2016-03-18.
  9. "Meteosat series". EUMETSAT. 15 April 2020. Retrieved 2 June 2022.
  10. "Current Space Segment Status and SAR Payloads". Archived from the original on 2012-11-30. Retrieved 2012-12-03.
  11. "Meteosat Third Generation (MTG) - EUMETSAT". 22 May 2020.
  12. "Meteosat Third Generation". Archived from the original on 2016-03-22. Retrieved 2016-03-18.
  13. ESA and Thales Alenia Space enter negotiations for MTG, ESA Press release, March 19, 2010, online www.esa.int
  14. "EUMETSAT 70th council puts MTG on tracks". Archived from the original on 2016-03-26. Retrieved 2016-03-18.
  15. Arianespace [@Arianespace] (25 November 2022). "[5/5] 🗓️ The new targeted launch date for #VV22 now is December 20; 🗓️ The new targeted launch date for #VA259 –initially scheduled for December 14- now is December 13" (Tweet) – via Twitter.
  16. "Ariane-5-Missionen" [Ariane-5 Missions]. DLR (in German). Retrieved 20 October 2022.
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