Encyclopedia Astronautica


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Associated Spacecraft
  • ZY Chinese earth land resources satellite. 6 launches, 1999.10.14 (ZY-1) to 2007.09.19 (ZY-2C). From 1985 China and Brazil jointly developed a sun synchronous imaging satellite bus, the Zi Yuan-1 (Resouce-1) based on the Shi Jian 3 design. More...

See also

INP Chronology

1999 October 14 - . 03:15 GMT - . Launch Site: Taiyuan. Launch Complex: Taiyuan LC1. LV Family: CZ. Launch Vehicle: CZ-4B. LV Configuration: Chang Zheng 4B CZ4B-2 (58).
  • ZY-1 - . Payload: Zi Yuan 1. Mass: 1,540 kg (3,390 lb). Nation: China. Agency: SISE. Manufacturer: CAST; INP. Class: Earth. Type: Earth resources satellite. Spacecraft: ZY. USAF Sat Cat: 25940 . COSPAR: 1999-057A. Apogee: 780 km (480 mi). Perigee: 773 km (480 mi). Inclination: 98.2000 deg. Period: 100.40 min. China-Brazil Earth Resources Satellite. China's first earth resources satellite, known as ZY-1, weighed 1,540 kilograms. Chief designer was Chen Yiyuan. The satellite, a joint project of China and Brazil, was designed to gather information on the environment, agriculture and urban planning through remote sensing images and data transmitted to China, Brazil and other countries. Planned lifetime was two years. The satellite circled the Earth 14 times a day and the groundtrack repeated after 26 days. By 23 February 2000 it had taken more than 20,000 high quality images. It was formally handed over for operational use on March 2 2000. The High Resolution CCD Camera had a resolution of 20 meters in the visible spectrum. The camera could point up to 32 degrees to either side of vertical, imaging the earth's surface stereoscopically. After 177 days the Wide Field Imager failed in early May 2000. Other devices, including the high resolution CCD camera, continue to work normally.

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