U.S. Space-Based Positioning, Navigation, and Timing Policy states that a fundamental goal of this policy is to ensure that the United States maintains space-based positioning, navigation, and timing services, augmentation, back-up, and service denial capabilities that: (1) provide uninterrupted availability of positioning, navigation, and timing services; (2) meet growing national, homeland, economic security, and civil requirements, and scientific and commercial demands; (3) remain the pre-eminent military space-based positioning, navigation, and timing services; (4) continue to provide civil services that exceed or are competitive with foreign civil space-based positioning, navigation, and timing services. GPS modernization includes new signals and capabilities required to be compatible with the use of existing GPS receivers designed in compliance with specifications and standards in existence at the time of the receiver design. Compatibility with federal augmentation system (Wide Area Augmentation System (WAAS), Local Area Augmentation System (LAAS), Nationwide Differential GPS (NDGPS), and Maritime DGPS (MDGPS)) receivers in accordance with the specifications of these systems is also required.


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    Title :

    Assessment of LightSquared Terrestrial Broadband System Effects on GPS Receivers and GPS-dependent Applications


    Publication date :

    2011


    Size :

    192 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English