2011-08-16 (China Military News from China-defense-mashup) – At the end of 2008, China launched anew remote sensing satellite “Yaogan 5″ at the Taiyuan Satellite Launch Center in north China’s Shanxi Province.
The satellite was successfully launched into the space on a Long March-4B carrier rocket. Although China said Yaogan-V is going to be used on civilian areas, in fact, this imaging satellite is a great milestone in Chinese space reconnaissance system. From some essaies published in China, Yaogan-V satellite has equipped new high resolution CCD camera and other new concept technologies to reach 0.65 meter or high resolution.
“High Resolution CCD Remote Sensing Camera” is developed by XIOPM (Xi’an Institute of Optics and Precision Mechanics, CAS). The Chief Designer is Li Yingcai (李英才), who firstly announced the sub-pixel imaging theory of TDI-CCD camera. Then the technological demonstration proved that new theory can raise 1.4 time resolution in dynamic push-broom imagining.
After the “Yaogan-V”‘s launch in 2008, PLA Senior officers send congratulations to XIOPM. The images sent from Yaogan-V satellite have greatly improved quality and raise 45% and 70% in image recognition and target identification. the In 2011, the “High Resolution CCD Remote Sensing Camera” project was granted as the Top Scientific and Technological Awards of National Defense.
Besides, the “Yaogan-V” satellite is believed to has an optical design of “Three-Mirror-Anastigmat with Fold Mirror” for the space camera. And the “F” number is 14.4 and long focal distance reaches 7200mm. When “Yaogan-V” at 450km orbit, the swath width can reach 12.5km. And the size of imaging pixel is 10 μm, the ground imagine single pixel resolution can reach 0.62m.
Since 2006, China has launched 11 “Yaogan” series satellites. This satellite family has two types of remote-sensing methods: photograph imaging and SAR. A UK-based Journal of Strategic Studies recently published a report that China’s constellation of satellites is transitioning from the limited ability to collect general strategic information and China may already be able to match the United States’ ability in the next two years.
The Launch Timeline of Yaogan satellites:
- Yaogan I: April. 27, 2006
- Yaogan II: May. 25, 2007
- Yaogan III: Nov. 12, 2007
- Yaogan IV: Dec. 1, 2008
- Yaogan V: Dec. 15, 2008
- Yaogan VI: Apr. 22, 2009
- Yaogan VII: Dec. 9, 2009
- Yaogan VIII: Dec. 15, 2009
- Yaogan IX: Mar. 5, 2010
- Yaogan X: Aug. 10, 2010
- Yaogan XI: Sep. 22, 2010