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) a follow-up protest for the deaths of al-Muhaishi and al-Filfil. On 16 December, about 100 people, mostly women, protested in Riyadh and Buraidah demanding that prisoners be released or tried. About 50 people were arrested in the two cities. Many were released by 23 December. On 23 December, a nationwide mosque sit-in protest again took place in cities including Riyadh and Jeddah, calling for the release of Dr. Yusuf al-Ahmad, imprisoned after having sent a Twitter message in support of prisoners' families. The protestors said that there are 30,000 political prisoners, mostly prisoners of conscience in Saudi Arabia. Thirty men