Formation flying is important for the Department of Defense (DoD) as well as NASA. Relative position and attitude measurements would enable next-generation surveillance missions involving formation flying with tight tolerances. These AR&D sensor technologies can enable advances in in-flight aerial refueling for DoD aircraft, particularly unmanned aerial vehicles (UAVs). Enhancing UAV capabilities is one of the major focus areas of DoD research and development funding. Finally, the commercial space market, fueled by prizes similar to the 2004 Ansari X-prize, has made orbital vehicles with AR&D capabilities the next great priority for privately-funded spacecraft. There are numerous potential applications for AR&D within the NASA. The Orion crew will require a relative navigation sensor to successfully dock with the ISS. The COTS program seeks to provide commercial resupply to the ISS. A prox ops sensor and automated control system is required to hold the rendezvous vehicle in a control box such that the SSRMS can grapple the payload and berth it to the ISS. The Exploration initiative requires an automated docking in lunar orbit in order to safely return the crew to earth. Space construction in lunar orbit will be required to support the colonization of the lunar surface and an expedition to Mars. AR&D sensors are required to support these and future efforts.
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