The Gravity Recovery and Climate Experiment (GRACE) was a joint mission of NASA and the German Aerospace Center (DLR). Twin satellites took detailed measurements of Earth's gravity field anomalies from its launch in March 2002 to the end of its science mission in October 2017.
Low Earth OrbitTDRS-9, known before launch as TDRS-I, is an American communications satellite which is operated by NASA as part of the Tracking and Data Relay Satellite System. It was constructed by the Boeing Satellite Development Center, formerly Hughes Space and Communications, and is based on the BSS-601 satellite bus.[3] It was the second Advanced TDRS, or second-generation Tracking and Data Relay Satellite, to be launched.
Geosynchronous Transfer OrbitSTS-109 (SM3B) was a Space Shuttle mission that launched from the Kennedy Space Center on 1 March 2002. It was the 108th mission of the Space Shuttle program, the 27th flight of the orbiter Columbia and the fourth servicing of the Hubble Space Telescope. It was also the last successful mission of the orbiter Columbia before the ill-fated STS-107 mission, which culminated in the Columbia disaster.
Low Earth OrbitMDS 1 (Mission Demonstration Satellite 1), renamed Tsubasa after launch, is a Japanese satellite that was launched by a H-2A-2024 rocket from Tanegashima Space Center at 02:32 UT on 4 February 2002. It was renamed Tsubasa (meaning Wings) after the successful launch.
Elliptical Orbit