NASA has satellites in GEO called TDRS, Tracking and Data Relay Satellites, which relay commands and telemetry from LEO satellites.
An important example of a system where the bandwidth-delay product is large is that of GEO satellite connections, where end-to-end delivery time is very high and link throughput may also be high.
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Many variants have been proposed, but the concept most often refers to an elevator that reaches from the surface of the Earth to geostationary outer space, with a counterweight attached at its outer end.
Launched in 1998 as Hot Bird 2, under Eutelsat's Hot Bird brand, the satellite was positioned in geostationary orbit at a longitude of 13 degrees east, colocated with the rest of the Hot Bird constellation.
A special case of the geosynchronous orbit, the geostationary orbit, has an eccentrity of zero (meaning the orbit is circular), and an inclination of zero in the Earth-Centered, Earth-Fixed coordinate system (meaning the orbital plane is not tilted relative to the Earth's equator).
Hellas-Sat Consortium Limited (Hellas-Sat) is the owner and a wholesaler of capacity and services of the Greek/Cypriot "Hellas-Sat-2" satellite, an Astrium Eurostar E2000+, which was launched successfully on 13 May, 2003 to the 39° E orbital position in the Geostationary Satellite Orbit.
Operated by Eutelsat, it provides direct to home broadcasting services from geostationary orbit as part of Eutelsat's Hot Bird Hot Bird constellation at a longitude of 13 degrees east.
It was also the first to use experimentally with some success electric propulsion in geostationary orbit.
Embratel, a formerly state-controlled communications company in charge of the Brazilian Satellite Communication System (Sistema Brasileiro de Comunicação por Satélites--SBTS), owns and operates a series of satellites that are positioned in geostationary orbit over the equator.