01776nam 2200421 a 450 991069907820332120090811133142.0(CKB)5470000002399101(OCoLC)430056156(EXLCZ)99547000000239910120090811d2009 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierGlobal Positioning System[electronic resource] significant challenges in sustaining and upgrading widely used capabilities : testimony before the Subcommittee on National Security and Foreign Affairs, Committee on Oversight and Government Reform, House of Representatives /statement of Cristina T. Chaplain[Washington, D.C.] :U.S. Govt. Accountability Office,[2009]1 online resource (11 pages) illustrationsTestimony ;GAO-09-670TTitle from title screen (GAO, viewed July 27, 2009)."For release ... May 7, 2009."Global Positioning System Global Positioning SystemArtificial satellites in navigationAstronautics, MilitaryUnited StatesGlobal Positioning System.Artificial satellites in navigation.Astronautics, MilitaryChaplain Cristina T1381995United States.Congress.House.Committee on Oversight and Government Reform.Subcommittee on National Security and Foreign Affairs.United States.Government Accountability Office.GPOGPOBOOK9910699078203321Global Positioning System3479716UNINA