The STS-99 Shuttle Radar Topography Mission (SRTM) was launched by Space Shuttle Endeavour, from Kennedy Space Center, on 11 February 2000. Crew members were Kevin Kregel, Commander (NASA), Dominic Gorie, Pilot (NASA), and Mission Specialists, Janet Kavandi (NASA), Janice Voss (NASA), Mamoru Mohri (NASDA), and ESA astronaut Gerhard Thiele, on his first ever space mission.
The main objective of SRTM is to operate from space a very complex radar system designed for cartography of the Earth in three dimensions. The radar bounces signals off the Earth's surface: these signals are received by two onboard antenna systems and combined by computers at a ground facility to produce precise 3-D images. Because the shuttle flys over most of the globe's surface, the data acquired will generate the most complete topographic map of Earth's land surface ever produced, covering an area between the southern tip of Greenland and South Georgia, close to the Antarctic Circle.SRTM will build on technology used during two shuttle

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