Satellite ATC (Australia) now back up with a frequency being relayed being a Melbourne Centre frequency covering both high and low airways to the west of Sydney. International and domestic flights from Sydney to Adelaide, Perth, Asia etc will be heard. The frequency is very busy in the afternoon with flights that have departed Sydney on their way to Asian ports, and in the early morning with flights arriving in Sydney from Asia.
This frequency covers many aircraft that are handed off the Sydney Departures feed at liveATC.
So for example if you are lstening to Sydney deaprtures and you hear a call like "Qantas 1 contact Melboune Centre 133.5". Then switch to the Satellite ATC feed and you can continue listening to the flight.