TacSat-1

TacSat-1 was an experimental satellite built by the Naval Research Laboratory (NRL) on behalf of the United States Department of Defense (DoD) Office of Force Transformation (OFT). It was the planned payload of the sixth launch of the SpaceXFalcon 1. It was however never launched into space. The second satellite in the series, TacSat-2, launched before TacSat-1 and this led to the cancellation of TacSat-1's launch.

TacSat-1 would have carried a variety of experimental payloads. Much of the payload software was implemented through the use of bash scripts operating on the "Copperfield-2" general-purpose computer system aboard the spacecraft.