ADS-B transmission medium
Just a minor quibble - ADS-B doesn't use VHF. ADS-B broadcasts on 1090MHz, the SSR frequency. In Australia and (I believe) parts of Indonesia, these broadcast signals are received by special equipment located on existing VHF sites and relayed back to the ATC system. This system has specific applicability in remote as opposed to oceanic airspace - something Australia has in abundance. (edited to correct SSR freq - What time of day is it again?
http://images.ibsrv.net/ibsrv/res/sr...s/confused.gif)
Last edited by Frequent SLF; 21st Sep 2011 at 04:05.