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FS - Fundamentals of Surveying GPS and GNSS Technology Flashcards

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  1. What does GNSS stand for in satellite navigation?

    Answer: Global Navigation Satellite System

    GNSS stands for Global Navigation Satellite System, an umbrella term covering all satellite navigation constellations worldwide.

  2. A minimum of how many satellites must be visible for 3D GPS positioning?

    Answer: 4

    At least 4 satellites are required for 3D positioning to solve for x, y, z coordinates and receiver clock error simultaneously.

  3. What does DOP stand for in GPS accuracy assessment?

    Answer: Dilution of Precision

    DOP (Dilution of Precision) describes how satellite geometry affects the accuracy of a GPS position fix.

  4. Which GPS observation method provides the highest accuracy for control surveying?

    Answer: Static differential GPS

    Static differential GPS provides the highest accuracy by collecting data over extended occupation periods at known and unknown stations simultaneously.

  5. What is the carrier wave frequency of the GPS L1 civilian signal?

    Answer: 1575.42 MHz

    The GPS L1 carrier frequency is 1575.42 MHz, which carries the C/A code used by civilian receivers.

  6. Which US agency operates the National CORS network used by surveyors?

    Answer: NOAA

    NOAA operates the National Continuously Operating Reference Stations (CORS) network, which provides GPS correction data across the US.