|Operator||AFRL, STP, NASA|
|Launch mass||181 kilograms (399 lb)|
|Start of mission|
|Launch date||Not launched|
|Rocket||Atlas V 401|
|Launch site||Cape Canaveral SLC-41|
|Perigee||560 kilometers (350 mi)|
|Apogee||560 kilometers (350 mi)|
TechSat-21 (Technology Satellite of the 21st Century) was a small spacecraft developed by the U.S. Air Force Research Laboratory’s Space Vehicles Directorate to test technology for formation flight of spacecraft which can rapidly change formation based on mission requirements. The project was canceled in 2003 due to numerous cost overruns.
- Staff Writers (2002-04-16). "MicroSat Systems Contract Raytheon For SAR Payload". Space Daily. Retrieved 2008-07-28.
- Singer, Jeremy (2006-12-07). "DARPA To Solicit Bids for Formation Flying Studies". Space News. Retrieved 2008-07-28.
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