An artist's impression of a Northrop Grumman proposal for a Quiet Supersonic Platform (QSP). The Defence Advanced Research Projects Agency (DARPA) announced on April 29, 2002 that two companies had been selected for Phase II, the systems study segment, of the QSP programme. Northrop Grumman received $2,699,780 in funding for the programme on March 14 and Lockheed Martin received $2,427,009 on March 25. For Phase II, the goals have been adjusted to concentrate on characteristics more relevant to a long-range supersonic military aircraft and focus on refinement of vehicle designs.