track your dive

The comprehensive recording of all data is only done in the Track mode of the airlogOne

Internally the airlogOne works with a high precision pressure sensor, whose pressure measurements are converted to the displayed altitude using the “baromeric formula” according to the ICAO standard. The only difference to the ICAO rules is the fact that on the ground is always the 0m position. This adjustment (measured pressure = 0m) is done automatically when the instrument is switched on and can be updated when the air pressure changes by means of the Alt0 key.

The GPS altitude is not displayed and is only stored additionally in the data tracks. GPS was not developed for altitude measurements and shows the greatest inaccuracies there. Also, the GPS altitude is always the altitude above the geoid (simplified: mean sea level) and therefore not null on the ground, so it is not usable for skydivers directly.

differential pressure sensors

two sensors measure static pressure plus dynamic pressure

were trying to measure true airspeed, which is possible if the airlogOne-motion is mounted to directly catch the incoming air. Together with groundspeed from GPS and the acceleration, gyroscopic and orientation sensors, we have all information necessary to fuse the maximum of information from your skydive. 

airlogOne-motion is designed as a headless device to be used on the helmet or directly on the body to catch body motion data. All relevant live data can be output via voice. Logging is possible up to 20Hz/50ms to deliver precise data to analyse after jump. airlogOne-motion opens the first generation of data-driven flight analysis.

truemove fusion sensor

The truemove* fusion sensor is an “Attitude and Heading Reference System (AHRS)” – a device that measures the orientation and motion of an object in space, usually using a combination of accelerometers, gyroscopes and magnetometers.

AHRS can be used in a variety of applications, including virtual reality, immersive gaming, sports and fitness, and robotics – you probably know it from your Playstation or Wii.

In aircraft navigation, it’s used to provide information about an aircraft’s attitude and heading (roll, pitch, yaw). The same is true for skydivers.

For an arm-worn tracker, truemove* is the technology that enables you to interpret the acceleration data received from the sensors – because you need to know the position and orientation of the sensor itself to transform all measurement data into “world coordinates”.

If the tracker is attached to a fixed position (e.g. chest strap, mudflap), it can provide detailed information about the orientation (attitude) of the jumper.