AIR FORCE SPACE COMMAND (AFSC) CAPSTONE REQUIREMENTS DOCUMENT (CRD) FOR GLOBAL POSITION, VELOCITY, AND TIME DETERMINATION CAPABILITY (DRAFT - 18 JULY 1997)

AIR FORCE SPACE COMMAND (AFSC) CAPSTONE REQUIREMENTS DOCUMENT (CRD) FOR GLOBAL POSITION, VELOCITY, AND TIME DETERMINATION CAPABILITY (DRAFT - 18 JULY 1997)., The capability to precisely determine position, velocity, and time (PVT) is extremely valuable for military missions and civil and commercial applications. Globally, such systems include the Global Positioning System (GPS), air traffic control facilities, aviation and maritime navigation aids, various precise time distribution systems, and many others. Although there are foreign systems that provide PVT information to United States (US) military and civil users, such systems will not be relied upon for military operations. Because of its national and international importance, as well as pervasive use, policies and guidance with respect to the GPS provide a foundation for defining overall requirements. Requirements are stated in terms of performance and no particular solution, either ground-based or space-based, is recommended or implied.