gpx-ideas

GPX Extensions

Skydiving

Overview

Example of a skydiver with a custom GNSS receiver with INS capabilities (optional).

• gpx_pvt - cog + sog + roc, plus accuracy estimates
• gpx_imu (optional) - hdg, pitch, roll

See short video with custom GPS providing audio feedback.

Trackpoint

GPX 1.1 example:

<trkpt lat="50.5710623" lon="-2.4563484">
  <ele>1007.90</ele>
  <time>2022-04-11T10:16:01Z</time>
  <sats>29</sats>
  <extensions>
    <pvt:ext>
      <pvt:cog acc="10.0">157.19</pvt:cog>
      <pvt:sog acc="0.542">30.542</pvt:sog>
      <pvt:roc acc="0.781">50.678</pvt:roc>
    </pvt:ext>
    <imu:ext>
      <imu:hdg>275.23</imu:hdg>
      <imu:roll>5.25</imu:roll>
      <imu:pitch>-10.15</imu:pitch>
    </imu:ext>
  </extensions>
</trkpt>

GPX 1.2 will allow for horizontal and vertical accuracy estimates:

<trkpt lat="50.5710623" lon="-2.4563484" acc="1.937">
  <ele acc="2.754">1007.90</ele>
  <time>2022-04-11T10:16:01Z</time>
  <sats>29</sats>
  <extensions>
    <pvt:ext>
      <pvt:cog acc="10.0">157.19</pvt:cog>
      <pvt:sog acc="0.542">30.542</pvt:sog>
      <pvt:roc acc="0.781">50.678</pvt:roc>
    </pvt:ext>
    <imu:ext>
      <imu:hdg>275.23</imu:hdg>
      <imu:roll>5.25</imu:roll>
      <imu:pitch>-10.15</imu:pitch>
    </imu:ext>
  </extensions>
</trkpt>

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