Initially I was quite doubtful because in the draft Aero protocol manual that can be freely obtained from ICAO ( International Civil Aviation Organization) called Part III – Inmarsat and MTSAT, calls the modulation scheme A-BPSK ( aeronautical binary phase shift keying) and JMSK demodulates MSK ( minimum shift keying) not BPSK ( binary phase shift keying). This program started when I was contacted by otti, a satellite monitoring enthusiast from Europe inquiring whether or not JMSK could be used to demodulate the 6 Aero signals. After the signals have been demodulated the ACARS messages are displayed. JAERO demodulates the two slowest speeds of 600 bps and 1200 bps as well as the faster rate of 10500 bps. There are different types of Classic Aero, the main difference being speed. The Classic Aero signals sent from satellites to the Aeroplanes are what JAERO demodulates and decodes. A quick search on the net using “Classic Aero MH370” will produce thousands of results. In the advent of MH370, Classic Aero has become a well-known name. Such signals are typically around 1.5Ghz and can be received with a simple low gain antenna that can be home brewed in a few hours in conjunction with a cheap RTL-SDR dongle. Demodulation is performed using the soundcard. JAERO is a program that demodulates and decodes Classic Aero ACARS ( Aircraft Communications Addressing and Reporting System) messages sent from satellites to Aeroplanes (SatCom ACARS) commonly used when Aeroplanes are beyond VHF range. JAERO A program to demodulate and decode Classic Aero SatCom ACARS signals
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