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  2. Controlled reception pattern antenna - Wikipedia

    en.wikipedia.org/wiki/Controlled_reception...

    Controlled reception pattern antennas (CRPA) are active antennas that are designed to resist radio jamming and spoofing.

  3. Choke ring antenna - Wikipedia

    en.wikipedia.org/wiki/Choke_ring_antenna

    A choke ring antenna is a directional antenna designed for reception of GNSS signals from satellites. It consists of a number of concentric conductive cylinders around a central antenna. The first choke ring antennas were invented at JPL; [ 2 ] since 1989 they have been improved and extended by many companies.

  4. GNSS applications - Wikipedia

    en.wikipedia.org/wiki/GNSS_applications

    A "GNSS compass" uses a pair of antennas separated by about 50 cm to detect the phase difference in the carrier signal from a particular GNSS satellite. [8] Given the positions of the satellite, the position of the antenna, and the phase difference, the orientation of the two antennas can be computed.

  5. GNSS reflectometry - Wikipedia

    en.wikipedia.org/wiki/GNSS_reflectometry

    GNSS reflectometry is a bi-static radar, where transmitter and receiver are separated by a significant distance. Since in GNSS reflectometry one receiver simultaneously can track multiple transmitters (i.e. GNSS satellites), the system also has the nature of multi-static radar.

  6. Satellite navigation solution - Wikipedia

    en.wikipedia.org/wiki/Satellite_navigation_solution

    Satellite navigation solution for the receiver's position (geopositioning) involves an algorithm.In essence, a GNSS receiver measures the transmitting time of GNSS signals emitted from four or more GNSS satellites (giving the pseudorange) and these measurements are used to obtain its position (i.e., spatial coordinates) and reception time.

  7. GPS signals - Wikipedia

    en.wikipedia.org/wiki/GPS_signals

    In a major departure from previous GPS designs, the M-code is intended to be broadcast from a high-gain directional antenna, in addition to a full-Earth antenna. This directional antenna's signal, called a spot beam, is intended to be aimed at a specific region (several hundred kilometers in diameter) and increase the local signal strength by ...

  8. Cyclone Global Navigation Satellite System - Wikipedia

    en.wikipedia.org/wiki/Cyclone_Global_Navigation...

    The Cyclone Global Navigation Satellite System (CYGNSS) is a space-based system developed by the University of Michigan and Southwest Research Institute with the aim of improving hurricane forecasting by better understanding the interactions between the sea and the air near the core of a storm.

  9. GPS-aided GEO augmented navigation - Wikipedia

    en.wikipedia.org/wiki/GPS-aided_GEO_augmented...

    In 2012, the Defence Research and Development Organisation (DRDO) received a "miniaturised version" of the device with all the features from Global Positioning Systems (GPS) and global navigation satellite systems (GNSS). The module weighing just 17 g (0.60 oz), can be used in multiple platforms ranging from aircraft (e.g. winged or rotor-craft ...

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