GPS III will improve position, navigation and timing services and provide advanced anti-jam capabilities yielding superior system security, accuracy and reliability.
GPS III将改善定位、导航和定时服务，并提供先进的抗干扰能力，提供优秀的系统安全、精度和可靠性。
GPS III will improve position, timing services, navigation and provide advanced anti-jam capabilities yielding superior system security, reliability and accuracy.
GPS III将增强定位、授时服务和导航能力，具有先进的抗干扰性能，为全球用户提供安全、可靠和准确的服务。
Firstly, a series of reference systems, related to GPS navigation positioning system, such as timing system, reference frame and force model system, are discussed in detail.
本文详细地论述了与GPS导航定位系统一系列有关的参考系统：时间系统、坐标系统和力模型系统。
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