Originally Posted by
Crash one
I mean a box that will detect any GPS receiver, including iPads, smart phones, tablets of all flavours etc. And with the capability to squelch out the ground based morons texting each other or car satnavs. Without the need for a transponder, certified dedicated kit etc. And certainly not at some stupid price.
That doesn't exist and wouldn't work technically with consumer hardware as GPS is "passive". It is conceivably possible using ACARS to send your position up to Immarsat's server who then calculate aircraft in proximity and set data down ACARS to your aircraft. But that would require an ACARS datalink and subscription which would cost a pretty penny... (plus it doesn't exist)
There are a couple of "open" protocols - P3I and OpenFlarm that broadcast your position on an unregulated frequency - essentially an unregulated "version" of ADS-B. But that leads to a load more individual protocols as has been pointed out previously...