These include cell phones, radar, and WWV, among others. Accordingly, following systems are addressed in FRP: GPS would be operated by Department of Defense (DOD) and the same would be managed by interagency GPS Executive Board. There will be no user charges for availability of Standard Positioning Service (SPS) to users, worldwide, on the continuous basis. Precise Positioning Service is the most accurate application, directly available from GPS, which is meant for US military and federal government users. (Charron, Status Report)The purpose of providing augmentations to GPS is to ensure accuracy, integrity, availability, and reliability to positioning, navigation, and timing (PNT) for meeting its specific requirements. Nationwide Differential GPS System (NDGPS) is a ground-based augmentation system, which is managed by Federal Railroad Administration, US Coast Guard and Federal Highway Administration, meant to provide increased accuracy to specific users. US Federal Aviation Administration operates Wide Area Augmentation System (WAAS), which provides aircraft navigation for all flights.This is a hyperbolic system of electronic navigation, to ensure accuracy in the radio-navigation systems as provided in FRP. The Federal Navigation Plan (FRP).
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