The flight paths of the satellites are tracked by dedicated U.S. Air Force monitoring stations in Hawaii, Kwajalein, Ascension Island, Diego Garcia, Colorado Springs, Colorado and Cape Canaveral, along with shared NGA monitor stations operated in England, Argentina, Ecuador, Bahrain, Australia and Washington DC.[53] The tracking information is sent to the Air Force Space Command's MCS at Schriever Air Force Base 25 km (16 mi) ESE of Colorado Springs, which is operated by the 2nd Space Operations Squadron (2 SOPS) of the U.S. Air Force. Then 2 SOPS contacts each GPS satellite regularly with a navigational update using dedicated or shared (AFSCN) ground antennas (GPS dedicated ground antennas are located at Kwajalein, Ascension Island, Diego Garcia, and Cape Canaveral). These updates synchronize the atomic clocks on board the satellites to within a few nanoseconds of each other, and adjust the ephemeris of each satellite's internal orbital model. The updates are created by a Kalman filter that uses inputs from the ground monitoring stations, space weather information, and various other inputs. "Levas" <someone@microsoft.com> wrote in message news:jhb5j5$400$1@trimpas.omnitel.net... > xuinia. Jie patys nezino ar tai tikrai atsitiko ar tai tik matavimo paklaidu taisymas... > > O del GPS, kazkaip neatrodo, kad GPS satelitai tik pakabinti sukasi ir sena info pumpuoja. Siaip jie ir tapusavyje ir su antzeminiu centru snekasi. Net lygtai buvo "paslinktos" koordinates pirmo persu ilankos karo metu. Tai ar net pastoviai ivedamos korekcijos. > > > > "Miegapele" <svinas69@gmail.com> wrote in message news:jhb4pu$2nv$1@trimpas.omnitel.net... >> http://www.technologijos.lt/n/mokslas/geografija/S-24303/straipsnis?name=S-24303&l=2&p=1 >> >> o kaip tai atsliepe gps. kaip ne kaip 1ms tokiais greiciais ir atstumais >> turetu ismakaluoti viska. +- bent 50 metru >>