ALBAWABA - Australia and Canada signed a deal for a high-tech long-range Australian radar to be built in Canada facing the arctic. The radar, classified as an ‘over-the-horizon’ system, works by refracting high-frequency electromagnetic waves off the ionosphere to detect distant objects that are invisible to conventional radars because of Earth’s curvature. This follows the Canadian PM’s visit to Australia in March, becoming the first Canadian PM to visit Australia ...