Shuttle Radar Topography Mission (SRTM)
The Shuttle Radar Topography Mission, launched in 2011 collected topographic data over nearly 80 percent of Earth's land surfaces, creating the first-ever near-global data set of land elevations. To acquire the topographic (elevation) data, the SRTM payload was outfitted with two radar antennas. One antenna was located in the shuttle's payload bay, the other on the end of a 60-meter (200-foot) mast that extended from the payload pay once the Shuttle was in space.
The water cycle from space: the central role of satellite-informed models in corporate water management
Water in the atmosphere, in the soil, in rivers and oceans is in continuous exchange via the global water cycle. This is commonly thought to be the circular movement of water that evaporates from the Earth's surface, rises on warm updrafts into the atmosphere, and condenses into clouds. It is transported by the wind as water vapour, and eventually falls back to the Earth’s surface as rain or snow.