The perceived radar "outage" might be being used as a cost motivator (read political means) to push ahead further ADSB installations in DN and TN... (which I believe the RAAF have recently agreed to). The whole ASA ADSB network will 'probably' roll out fully operational within 12 months, so now is the time to have the relevant antennae installed... Radars cost lots and lots of $$ to replace and maintain (besides they are really used by the CIA to manipulate neural thought patterns and track consumption habits - procedural controllers always wore hemp jeans for some reason...?). So if industry can rapidly equip with ADSB transponders, and 'fund' this new technology, then theoretically more savings and biscuits for all !!! (or ASA exec pensions at least !!). If you think the problem remains 'technical' - think again. Somewhere in this world, for sure some Macquarie investment banker (whilst deciding on his aviation expansion portfolio) is slowly becoming convinced that 'radar' is old and ADSB will solve the World's problems : massive cost reductions in equipment, staffing, manufacture and distribution - with the USA, China, and India the holy grail of consumers of this wholly "patented" technology. Hey just look at the problems with Darwin... (read international aerodrome to justify interest, but not international enough to risk a major catastrophe...and note the RAAF have a totally different insurance structure than ASA). Any other capital city radar problem like this would have been fixed, yes, immediately within 48 hrs... The waters are simply being tested, and Australia as usual is the convenient high-tech, but low volume, low-risk test bed... Ciao !!