History of radar for various purposes; on the Shuttle Radar Topography Mission, the entire planet was mapped at a 30-m resolution. The Jodrell Bank Observatory, an operation of the University of Manchester in Britain, was originally started by Bernard Lovell to be a radar astronomy facility. It initially used a war-surplus GL-II radar system operating at 71 MHz (4.2 m). The first observations were of ionized trails in the Geminids meteor shower during December 1945. While the facility soon evolved to become the third largest radio observatory in the world, some radar astronomy continued. The largest (250-ft or 76-m in diameter) of their
The December Group The December Group The December Group (, "Decembarska grupa") was a Serbian artistic group founded in Belgrade in 1955. It ceased to exist in 1960. Group members were: Zoran Petrović, Miloš Bajić, Aleksandar Luković, Lazar Vujaklija, Mladen Srbinović, Aleksandar Tomašević, Lazar Vozarević, Miodrag B. Protić, Stojan Ćelić and Dragutin Cigarčić. The group has held nine exhibitions, and there were two retrospective in Belgrade in 1969 at the Gallery of the Cultural Center and in 1995 at the Zepter Gallery. After the stabilization of the political and ideological situation in Yugoslavia after 1950. the conditions were created for opening new avenues