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Source: http://defence-data.com/features/fpage37.htm
JORN: The Australian HAARP
Posted on February 24, 2008
Australia has had (since 2000) the "Jindalee Operational Radar Network" which is supposed to be able to detect the approach of stealth bombers, and illegal immigration operations from neighboring countries at distances up to 3000 kilometers. It took 30 years to set up this system. Here is the radar coverage provided by three stations.
The long-range radar coverage of the Australian sky to the north
Such a radar range is not possible without wave reflection at high altitude, due to the curvature of the Earth.
The American company Lockheed Martin was the partner of Australia for the installation of this system. JORN uses two HF transmitters located 2300 km apart. These two transmitters consist of sequences of antennas capable of emitting a power of 20 kilowatts.
The microwave transmitter, one kilometer long
Signals are aimed at the ionosphere, where the beam is reflected over the horizon to targets up to 3000 km away.
The signals are sent to the ionosphere where the beams are reflected beyond the horizon towards targets located 3000 km away. The reflected signals are received by a second antenna system, deployed over 3 km, consisting of 960 masts that must be aligned with a precision of less than a centimeter. :
Receiving antennas, deployed over 3 km
The Australians say that the range of this system goes well beyond this "declassified" range of 3000 km. They also claim that the relatively low frequencies emitted would allow for echoes from the absorbing surfaces of enemy stealth bombers.
Not all countries can afford such systems, based on ionospheric reflection. It is then possible that other countries (in fact, all, since the system is much more accessible) have turned to reflection on vaporized droplets at high altitude, giving the famous "chemtrails". These systems are classified and the countries that use them (France as well, probably) prefer to deny the use of such methods, given the consequences of these chemicals on the ground, harmful to the environment and, very likely, also to humans.