In 2015 Locosytech introduced the GX-52, a high frequency GPS Unit that supports Doppler Speed & Doppler Speed Error (SDOP). The Technical Advisory Board has tested and approved the GX-52 for the highest level of GPS Devices and is therefore officially approved for all record rankings.

GW-52 is a GPS instrument optimized to measure speed using GPS-Doppler effect, designed specifically with GPS Speedsailing in mind.

  • Screen speed resolution: 0.01 km/h
  • Screen update: 5Hz
  • Speed and GPS parameters update & log frequency: 5Hz in SBP data format
  • Log speed resolution 1 cm/s
  • Standard deviation of log speed is recorded as SDOP for each speed sample (resolution 1cm/s)
  • SDOP bar on screen to indicate speed measuring precision and quality of the satellite signals seen by GW-52
  • Speed Genie function with “current speed” (delayed by ~1s) or N-second average speed display
  • 10-second average speeds above 60km/h measured with precision of 3cm/s and 99.9% certainty. This means that most of measurements will have higher accuracy.
  • Inaccurate measurements can be easily identified using SDOP (Standard Deviation for each speed sample).

Additional information about GW-52

  • GW-52 relies on line-of view satellite positions for maximum speed measurement accuracy
  • GW-52 speed measuring precision increases with measured speed due to physics of GPS-Doppler process (signal reflections and interference from stationary objects are filtered away by GPS receiver when it moves. The higher the receiver speed, the better this filtering is resulting in more precise speed measurement). For this reason GW-52 speed measuring precision has been tested for speeds in the range 60-100km/h

A Quick Reference Card how to setup the GX-52 can be found here