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Since then, he has led teams working on a number of research and flight projects sponsored by NASA, including the Shuttle Imaging Radar series and the Cassini Titan Radar.
In the 1980s, it took the shuttle imaging radar to discover subsurface rivers in the Sahara.
As director of the Jet Propulsion Laboratory and vice president of California Institute of Technology, Elachi has been a principal investigator on a number of research and development studies and flight projects sponsored by NASA; including the Shuttle Imaging Radar series, the Magellan imaging radar at Venus, and the Cassini Titan.