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This article is missing information about other geosynchronous satellites. Please expand the article to include this information. Further details may exist on the talk page. (April 2017)

This is a list of satellites in geosynchronous orbit (GSO). These satellites are commonly used for communication purposes, such as radio and television networks, back-haul, and direct broadcast. Traditional global navigation systems do not use geosynchronous satellites, but some SBAS navigation satellites do. A number of weather satellites are also present in geosynchronous orbits. Not included in the list below are several more classified military geosynchronous satellites, such as PAN.

A special case of geosynchronous orbit is the geostationary orbit, which is a circular geosynchronous orbit at zero inclination (that is, directly above the equator). A satellite in a geostationary orbit appears stationary, always at the same point in the sky, to ground observers. Popularly or loosely, the term "geosynchronous" may be used to mean geostationary. Specifically, geosynchronous Earth orbit (GEO) may be a synonym for geosynchronous equatorial orbit, or geostationary Earth orbit. To avoid confusion, geosynchronous satellites that are not in geostationary orbit are sometimes referred to as being in an inclined geostationary orbit (IGSO).

Some of these satellites are separated from each other by as little as 0.1° longitude. This corresponds to an inter-satellite spacing of approximately 73 km. The major consideration for spacing of geostationary satellites is the beamwidth at-orbit of uplink transmitters, which is primarily a factor of the size and stability of the uplink dish, as well as what frequencies the satellite's transponders receive; satellites with discontiguous frequency allocations can be much closer together.

As of July 2023, the website UCS Satellite Database lists 6,718 known satellites. Of these, 580 are listed in the database as being at GEO. The website provides a spreadsheet containing details of all the satellites, which can be downloaded.

Listings are from west to east (decreasing longitude in the Western Hemisphere and increasing longitude in the Eastern Hemisphere) by orbital position, starting and ending with the International Date Line. Satellites in inclined geosynchronous orbit are so indicated by a note in the "remarks" columns.

Western hemisphere

Eastern Hemisphere

In transit

The factual accuracy of parts of this article (those related to table) may be compromised due to out-of-date information. Please help update this article to reflect recent events or newly available information. (November 2010)

Historical

This list is incomplete; you can help by adding missing items. (August 2008)

References

1. C. D. Brown (1998), Spacecraft Mission Design, 2nd Edition, AIAA Education Series, p. 81
2. "Ariane 5 User's Manual Issue 5 Revision 1" (PDF). arianespace. July 2011. Archived from the original (PDF) on 4 October 2013. Retrieved 28 July 2013.
3. "What is orbit?". NASA. 25 October 2001. Retrieved 10 March 2013. Satellites that seem to be attached to some location on Earth are in Geosynchronous Earth Orbit (GEO)... Satellites headed for GEO first go to an elliptical orbit with an apogee about 23,000 miles. Firing the rocket engines at apogee then makes the orbit round. Geosynchronous orbits are also called geostationary. This article incorporates text from this source, which is in the public domain.
4. "YAMAL 300K". N2YO.com. Retrieved 1 June 2021.
5. ^ "NOAA Satellite Information System (NOAASIS)". NOAA. Archived from the original on 25 August 2018. Retrieved 26 July 2017. This article incorporates text from this source, which is in the public domain.
6. "GALAXY 12". N2YO.com. 5 April 2016.
7. ^ wikipedia list of Inmarsat satellites
8. "El ARSAT-2 llegó a órbita geoestacionaria" [The ARSAT-2 has reached the geostationary orbit] (in Spanish). ARSAT S.A. 10 October 2015. Retrieved 10 October 2015.
9. BulgariaSat-1
10. "Satellite Coverage Maps – Bulgariasat". Archived from the original on 3 December 2018. Retrieved 7 December 2017.
11. "Azerspace/Africasat-1a is prepared for Arianespace's first Ariane 5 launch in 2013".
12. "GALAXY 27 (TELSTAR 7) Satellite details 1999-052A NORAD 25922". N2YO. 5 April 2016.
13. "GSat 18". space.skyrocket.de. Retrieved 21 February 2018.
14. ^ "NBN-Co 1A, 1B (Sky Muster 1, 2)". space.skyrocket.de. Retrieved 21 February 2018.
15. Amos, Jonathan (11 May 2018). "SpaceX flies 'lessons learned' rocket". BBC News. Retrieved 11 May 2018.
16. ^ "NBN-Co 1A – Ariane 5 VA226 – Spaceflight101". spaceflight101.com. Retrieved 21 February 2018.
17. Podvig, Pavel (2002). "History and the Current Status of the Russian Early-Warning System" (PDF). Science and Global Security. 10 (1): 21–60. Bibcode:2002S&GS...10...21P. CiteSeerX 10.1.1.692.6127. doi:10.1080/08929880212328. ISSN 0892-9882. S2CID 122901563. Archived from the original (PDF) on 15 March 2012.
18. Sat ND | Failures – Thaicom 3
19. ^ Hallah, Tashikalmah; Okeke, Francis; Muhammad, Hamisu (19 November 2008). "Nigeria: Nigcomsat-1 is Lost, MD Says". allAfrica. Retrieved 19 November 2008.

External links

• SatcoDX, a useful 3rd party resource
• Lyngsat, a useful 3rd party resource
• Satbeams – satellite footprints
• TrackingSat – List of satellites in geostationary orbit
• Zarya.info's list of satellites in geosynchronous orbit, updated daily

• Communications satellites
• Lists of satellites
• Satellite broadcasting
• Satellites in geosynchronous orbit