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location-dotGNSS PPP-RTK

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What is GNSS PPP-RTK?

PPP-RTK combines the best parts of PPP and RTK. It provides centimeter-level positioning accuracy, like RTK, but works almost anywhere in the world, like PPP.

It’s a modern hybrid method designed to give you both precision and convenience.

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How GNSS PPP-RTK Works (Step by Step)

  1. Satellites send signals GNSS satellites (like GPS, Galileo, or BeiDou) continuously send signals containing their position and timing information.

  2. Global reference networks collect data A worldwide network of permanent ground stations receives these signals. These stations calculate:

    • Precise satellite orbits and clock corrections (as in PPP)

    • Bias information that helps fix the integer ambiguities of the satellite signals (as in RTK)

  3. A correction service processes and broadcasts data The corrections from all these stations are combined by a correction service provider. The service sends real-time corrections over the internet or through satellite links to your receiver.

  4. Your receiver applies corrections Your GNSS receiver receives the same satellite signals plus the real-time correction data. It can then:

    • Instantly resolve the carrier-phase ambiguities (like RTK)

    • Use the global orbit and clock corrections (like PPP)

  5. You get a precise position — fast Thanks to this combination, PPP-RTK gives you:

    • Centimeter-level accuracy

    • Fast convergence (seconds to a minute)

    • Global coverage

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Why It’s Powerful

  • RTK alone gives instant precision but only works near a local base station.

  • PPP alone works anywhere but takes a long time to converge.

  • PPP-RTK gives you the accuracy of RTK and the global reach of PPP — with fast setup and global corrections.

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Real-Life Uses

  • Autonomous vehicles and drones: Precise navigation anywhere on Earth.

  • Surveying: High accuracy without setting up local base stations.

  • Maritime and aviation: Reliable, global real-time positioning.

  • Geoscience: Long-term monitoring with consistent accuracy.

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In Short

GNSS PPP-RTK is like having a global RTK system. It uses corrections from a worldwide network instead of a single local base station, giving fast, centimeter-level positioning almost anywhere — perfect for modern, connected applications.

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