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  2. 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.

  3. GPS disciplined oscillator - Wikipedia

    en.wikipedia.org/wiki/GPS_disciplined_oscillator

    A GPS disciplined oscillator unit with a GPS antenna input, 10 MHz and 1 pulse-per-second (PPS) outputs, and an RS-232 interface.. A GPS clock, or GPS disciplined oscillator (GPSDO), is a combination of a GPS receiver and a high-quality, stable oscillator such as a quartz or rubidium oscillator whose output is controlled to agree with the signals broadcast by GPS or other GNSS satellites.

  4. Binary offset carrier modulation - Wikipedia

    en.wikipedia.org/wiki/Binary_offset_carrier...

    Binary offset carrier modulation [1] [2] (BOC modulation) was developed by John Betz in order to allow interoperability of satellite navigation systems. It is currently used in the US GPS system, Indian IRNSS system and in Galileo [3] and is a square sub-carrier modulation, where a signal is multiplied by a rectangular sub-carrier of frequency equal to or greater than the chip rate.

  5. Radio occultation - Wikipedia

    en.wikipedia.org/wiki/Radio_occultation

    GNSS radio occultation (GNSS-RO), historically also known as GPS radio occultation (GPS-RO or GPSRO), is a type of radio occultation that relies on radio transmissions from GPS (Global Positioning System), or more generally from GNSS (Global Navigation Satellite System), satellites.

  6. Dilution of precision (navigation) - Wikipedia

    en.wikipedia.org/wiki/Dilution_of_precision...

    5–10 Moderate Positional measurements could be used for calculations, but the fix quality could still be improved. A more open view of the sky is recommended. 10–20 Fair Represents a low confidence level. Positional measurements should be discarded or used only to indicate a very rough estimate of the current location. > 20 Poor

  7. HP 49/50 series - Wikipedia

    en.wikipedia.org/wiki/HP_49/50_series

    Previous versions of HPGCC supported the other ARM-based calculator models (the 48gII, and the hp 39g+/HP 39gs/HP 40gs), but this was removed due to lack of interest and compatibility issues. Formally, HPGCC is a cross-compiler ; it compiles code for the ARM-based HP calculators, but runs on a PC rather than the target system.

  8. List of satellite pass predictors - Wikipedia

    en.wikipedia.org/wiki/List_of_satellite_pass...

    View satellite position on world map or a simple polar chart showing the path the satellite will take across your sky. [10] ISS Visibility, interface to Heavens-Above, predictions up to 30 days out, ground tracks, star chart with path shown. [11] SkySafari shows alerts for Iridium flares and ISS passes. ISS Detector – shows ISS position. Can ...

  9. GPS week number rollover - Wikipedia

    en.wikipedia.org/wiki/GPS_week_number_rollover

    [10] Prior to return to normal standard time from daylight saving time during the morning of November 3, 2019, Apple issued a warning to owners of iPhone and iPad devices sold before 2012 to update or risk losing Internet connectivity. [11] Some Furuno GPS models had an internal rollover on January 2, 2022.

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