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  2. Global Positioning System - Wikipedia

    en.wikipedia.org/wiki/Global_Positioning_System

    GPS receiver manufacturers design GPS receivers to use spectrum beyond the GPS-allocated band. In some cases, GPS receivers are designed to use up to 400 MHz of spectrum in either direction of the L1 frequency of 1575.42 MHz, because mobile satellite services in those regions are broadcasting from space to ground, and at power levels ...

  3. GPS signals - Wikipedia

    en.wikipedia.org/wiki/GPS_signals

    GPS encodes this information into the navigation message and modulates it onto both the C/A and P(Y) ranging codes at 50 bit/s. The navigation message format described in this section is called LNAV data (for legacy navigation). The navigation message conveys information of three types: The GPS date and time, and the satellite's status.

  4. GPS tracking unit - Wikipedia

    en.wikipedia.org/wiki/GPS_tracking_unit

    A GPS tracking unit, geotracking unit, satellite tracking unit, or simply tracker is a navigation device normally on a vehicle, asset, person or animal that uses satellite navigation to determine its movement and determine its WGS84 UTM geographic position (geotracking) to determine its location. [1]

  5. Positioning system - Wikipedia

    en.wikipedia.org/wiki/Positioning_system

    A major subclass is made of geopositioning systems, used for determining an object's position with respect to Earth, i.e., its geographical position; one of the most well-known and commonly used geopositioning systems is the Global Positioning System (GPS) and similar global navigation satellite systems (GNSS).

  6. Navigation - Wikipedia

    en.wikipedia.org/wiki/Navigation

    Navigation [1] is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another. [2] The field of navigation includes four general categories: land navigation, [ 3 ] marine navigation , aeronautic navigation, and space navigation.

  7. Differential GPS - Wikipedia

    en.wikipedia.org/wiki/Differential_GPS

    DGPS Reference Station (choke ring antenna)A reference station calculates differential corrections for its own location and time. Users may be up to 200 nautical miles (370 km) from the station, however, and some of the compensated errors vary with space: specifically, satellite ephemeris errors and those introduced by ionospheric and tropospheric distortions.

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