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1227 2 GPS衛(wèi)星類型 (1)試驗(yàn)衛(wèi)星 : Block Ⅰ (2)工作衛(wèi)星 : Block Ⅱ Block Ⅱ 存儲(chǔ)星歷能力為 14天,具有SA和 AS地能力 Block Ⅱ A ( Advanced) 衛(wèi)星間可相互通訊,存儲(chǔ)星歷能力為 180天, SV35和 SV36帶有激光反射棱鏡 Block Ⅱ R ( Replacement/Replenishment) 衛(wèi)星間可以相互跟蹤相互通訊 Block Ⅱ F( Follow On) 新一代的民用衛(wèi)星,增設(shè)民用頻率 GPS Constellation Block I ? vehicle numbers (SVN) 1 through 11 ? launched between 1978 and 1985 ? concept validation satellites ? developed by Rockwell International ? circular orbits ? inclination 63 deg ? one Cesium and two Rubidium clocks ? design life of 5 years (majority performed well beyond their life expectancy) GPS Constellation Block II ? vehicle numbers (SVN) 13 through 21 ? launched between 1989 and 1990 ? full scale operational satellites ? developed by Rockwell International ? nearly circular orbits ? inclination 55 deg ? two Cesium and two Rubidium clocks ? design life of years ? AS/SA capabilities GPS Constellation Block IIA ? vehicle numbers (SVN) 22 through 40 ? launched since 1990 (18 out of 19) ? second series of operational satellites ? developed by Rockwell International ? nearly circular orbits ? inclination 55 deg ? two Cesium and two Rubidium clocks ? design life of years ? AS/SA capabilities GPS Constellation Block IIR ? vehicle numbers (SVN) 41 through 62 ? total of 6 launched (1 unsuccessful) ? operational replenishment satellites ? developed by Lockheed Martin ? nearly circular orbits ? inclination 55 deg ? one Cesium and two Rubidium clocks ? design life of years ? AS/SA capabilities GPS Constellation Block IIF ? will be launched between 2022 and 2022 ? operational follow on satellites ? nearly circular orbits ? inclination 55 deg ? design life of 10 years ? will carry an inertial navigation system ? will have an augmented signal structure (third frequency) as of 2022 GPS Constellation Block III In November 2022, Lockheed Martin and Boeing were each awarded a $16million, 12month study contract by the Air Force to conceptualize the next generation GPS satellite, which will be know