The Shuttle Radar Topography Mission (SRTM) is a partnership between
NASA and the National Geospatial-Intelligence Agency (NGA). Flown aboard the NASA
Space Shuttle Endeavour (11-22 February 2000), SRTM fulfilled its mission to map the
world in three dimensions. The USGS is under agreement with NGA and NASA's Jet
Propulsion Laboratory to distribute the C-band data. SRTM utilized dual Spaceborne
Imaging Radar (SIR-C) and dual X-band Synthetic Aperture Radar (X-SAR) configured as
a baseline interferometer to successfully collect data over 80 per cent of the
Earth's land surface, everything between 60 degrees North and 56 degrees South
latitude.