FLARM Range analyzer

By analyzing data from the built-in flight recorder (IGC files), the FLARM Range analyzer can tell you the quality of your FLARM antenna installation.

Flights to be analyzed must have a duration of at least 30 minutes and contact with at least 5 other aircraft while flying.

Choose an IGC file, recorded with a FLARM device:


 

Technical information

FLARM devices store some randomly chosen relative positions of other aircraft in an IGC file. This data is then analyzed to determine the transmission range. As the transmission depends equally on your and the other aircraft’s radio performance, which is unknown, a large number of data points must be collected. The inherent limitation of this analysis is that it can only examine and show successful transmissions. Therefore it can indicate areas of confirmed performance, but can only hint at areas with no reception, as there will be little or no data from there.

How can I improve the transmission range?

  • Check the Installation Manual to see if all rules and recommendations have been followed
  • If you have an internal antenna, relocate the FLARM antenna to another position, as far away as possible from any metal / carbon
  • If you have an internal antenna, install instead an external antenna

Should I try to improve the “Maximum distance”?

Distances beyond 12 km in one direction and much worse distances in other directions is normally a sign that the performance is not evenly distributed in all directions. Therefore, a big “Maximum distance” could be bad for overall performance.

Sample Analysis

The data below is from a Classic FLARM, with an internal antenna, mounted on the instrument panel of the rear seat in a Duo Discus.

The transmission range in flight direction is clearly affected by the attenuation caused by the front seat pilot and fuselage.

FLARM Range Analyzer example

Disclaimer

This tool performs a statistical analysis of past data, based on data supplied by the user. The result of this analysis may differ significantly from actual, individual performance.