I’m trying to get a handle on the amount of traffic that there is on the various many ACARS channels that seem to be in use. In a previous post, I counted 20 channels and that information was from a few different sources.
So i pointed the output of acarsdec to a text file, and let it capture almost 82k messages over the 7.6 day period from 4 Jun to today. Due to the maximum instantaneous bandwidth limitations of acarsdec and the RTL-SDR dongle, I decided to focus on the following
As can be seen, the vast majority of ACARS messages on the 7 channels scanned over that 7.6 day period are on only 2 channels, 130.025 and 131.550. Row 1 is the channel frequency, row 2 the percentage of messages received on that channel, row 3 the absolute message count for that channel, and row 4 the average messages per minute on that channel.
Now I’ll change the channels and do another run to see if there is more activity elsewhere.