On Thursday, May 7, 2015 at 7:40:59 AM UTC-7, kirk.stant wrote:
The problem is, in order to see ALL ADS-B traffic, you HAVE to have ADS-B out. So to get reliable info, you have to have, at a minimum, about $1500 for a Skyguard UAT transceiver and and $500 for an iFly display to show the data. Or an iPhone 6+, same price.

Uh no, to see all ADS-B traffic you just need to have receivers for both UAT and 1090ES, both transmit continuously whether or not there is other ADS-B traffic in the area. It is ADS-R from ground stations that may not be transmitted if there are no detected ADS-B out targets in the area.