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    • GPS/GNSS
      • RTK GPS
      • RTCM
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  1. Drone Show Technology
  2. GPS/GNSS

RTCM

PreviousRTK GPS

Last updated 4 months ago

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RTCM (Radio Technical Commission for Maritime) is a protocol that supports transferring a variety of correction messages from a base station to a rover (or in our case a drone). In an -enabled system, RTCM data must be regularly generated/transmitted by the base station and received by the rover to attain cm-level accuracy. Data is sent at roughly 1 Hz, or once per second. If an RTCM stream is lost, accuracy will degrade until standard 3D-Fix is reached (~3 meters). This is well beyond the inter-drone distance used during show design, so a loss of RTCM can result in collisions.

If you've ever seen a drone show look "fuzzy" or chaotic, then it is most likely due to a loss of RTCM.

Data Transfer

In Verge Aero's system, RTCM data is transmitted via high-reliability link. As this is the only data stream that is absolutely necessary during an active drone show, using a low-bandwidth, high-reliability link maximizes the likelihood of successful reception. RTCM data is also optionally sent over the primary gateway, however it requires that a be connected and active. Having multiple radio paths improves the system's robustness.

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