Yes, I'm told it is (was? has it changed?) a simple 1200 baud ASCII signal that sends out nothing more than a series of geographic coordinates. There are a great many packages out there that could potentially decode this. The Utility Monitoring Central link on our Utility wiki will give you a good selection, if you're interested. Likely as not, since it's so low-speed, that a discriminator tap would not be needed 73 Mike
A flight following system in SYSCOM provides visual awareness of the status and location of all MSP helicopters. The system utilizes the FAA’s newest tracking system known as Automatic Dependant Surveillance-Broadcast (ADS-B). MIEMSS has partnered with the FAA to increase the coverage area of ADS-B by utilizing the state’s tower sites and transport systems.
Feel free to suggest the equipment, but remember it's not like ACARS. In the future, services like flightaware might be able to stream ads-b based info to web browsers like they currently do with ifr radar traffic, but as it stands at the moment, the FAA is only releasing its ads-b flight tracking software to those who need it.