4/1/2024 0 Comments Planeplotter with acarsd![]() ![]() ![]() Q: Sometimes I can see a string of red triangles spread out across the world.Don't expect to see a screen full of red triangles within five minutes of running your system. A: The ratio of ACARS messages which contain position reports, to those which don't, is very small.Q: Although my ACARS message log is big, I am not seeing many plots on my screen.A: Yes, please take a look at this video from Nic Storey.Q: Can I use a low-cost USB TV receiver dongle as a receiver for ACARS?.Plane Plotter attempts to establish this mode of operation in the sound card and will report an error if the mode is not supported by the sound card, or if the sound card is being used by another application. A: The sound card must be capable of operation at a 48 KHz sampling rate and of yielding a 8-bit mono result.Details for the RPi are here and for the PC here. There is now a program available for the Raspberry Pi which allows simultaneous decoding of multiple ACARS frequencies using the low-cost RTL dongle. Traffic appears to be evenly shared between all four frequencies, so if you have the facility to scan them all, then do so. The mode is AM, so use the line, headphone or speaker output, and not from a discriminator tap!. There are four main ACARS frequencies for the UK and Europe. ![]()
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