Hi Lee,
I'm interested to hear that you are looking at decoding FLARM signals by using a Flarm Mouse - would the above mentioned unit be suitable? If so, how would the total power requirements look like? I see that the Flarm Mouse is looking for a 3A connection, the Pi needs a 2A connector so that excludes the use of a battery pack, correct? At the same time, assuming the need to use an onboard power sockets, are there any thoughts of taking the Flarm Mouse connector and 'adopting' it to ensure that cable can connect to the Pi providing that with power as well, coming from a typical cigarette lighter socket? Or are we looking at getting our own soldering irons out?
Secondly, what are your thoughts on cabling and space on the top of the glare shield? My thoughts would be to secure the units under the seats, out of sight but use antenna extenders to place these in an area where they have decent views outside - would this be possible?