 The Digital Array Scanned Interferometer (DASI) was operated from the Pathfinder in the summer of 1997, acquiring imaging interferometric data of the Hawaiian Islands.The DASI, which originated at Washington University and was jointly developed with Ames Research Center, had to meet the stringent engineering and operating requirements of the Pathfinder with respect to remote operation, very light weight, and low volume, power and bandwidth.In March 2002, NASA Dryden, in cooperation with New Mexico State University's Technical Analysis and Applications Center (TAAC), the FAA and several other entities, conducted flight demonstrations of an active detect, see and avoid (DSA) system for potential application to UAVs at Las Cruces, New Mexico.