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
Timeline of the 2011–12 Saudi Arabian protests (May–December 2011) and thirty women among the Riyadh protestors were arrested. Most were released by 28 December. During protests in Qatif on 30 December calling for freedom and equality and for the release of political activists from prison, police snipers on rooftops fired guns at protestors. At least three protestors were injured. Similar protests were held in other towns and villages in the Qatif province. Timeline of the 2011–12 Saudi Arabian protests (May–December 2011) The following is a timeline of the 2011–2012 Saudi Arabian protests from May to December 2011. The 2011–2012 Saudi Arabian protests are a series of ongoing protests taking