Encyclopedia Astronautica
Yaogan


Chinese synthetic aperture radar military surveillance radar and ELINT satellite. Operational, first launch 2006.04.26.

The satellites were placed in sun-synchronous orbits at 600 km altitude.

Gross mass: 2,700 kg (5,900 lb).
First Launch: 2006.04.26.
Last Launch: 2010.09.22.
Number: 13 .

More... - Chronology...


Associated Countries
See also
  • CZ China's first ICBM, the DF-5, first flew in 1971. It was a two-stage storable-propellant rocket in the same class as the American Titan, the Russian R-36, or the European Ariane. The DF-5 spawned a long series of Long March ("Chang Zheng") CZ-2, CZ-3, and CZ-4 launch vehicles. These used cryogenic engines for upper stages and liquid-propellant strap-on motors to create a family of 12 Long-March rocket configurations capable of placing up to 9,200 kg into orbit. In 2000 China began development of a new generation of expendable launch vehicles using non-toxic, high-performance propellants with supposedly lower operating costs. However these encountered development delays, and it seemed the reliable Long March series of rockets would continue in operational use for nearly fifty years before being replaced. More...

Associated Launch Vehicles
  • CZ Chinese orbital launch vehicle. China's first ICBM, the DF-5, first flew in 1971. It was a two-stage storable-propellant rocket in the same class as the American Titan, the Russian R-36, or the European Ariane. The DF-5 spawned a long series of Long March ("Chang Zheng") CZ-2, CZ-3, and CZ-4 launch vehicles. These used cryogenic engines for upper stages and liquid-propellant strap-on motors to create a family of 12 Long-March rocket configurations capable of placing up to 9,200 kg into orbit. In 2000 China began development of a new generation of expendable launch vehicles using non-toxic, high-performance propellants with supposedly lower operating costs. However these encountered development delays, and it seemed the reliable Long March series of rockets would continue in operational use for nearly fifty years before being replaced. More...
  • CZ-2D Chinese orbital launch vehicle. The Long March 2D was a two-stage launch vehicle with storable propellants, suitable for launching a variety of low earth orbit satellites. Developed and manufactured by the Shanghai Academy of Spaceflight Technology, the CZ-2D had a typical payload capability of 3,500kg in a 200 km circular orbit. Its first stage was identical to that of the CZ-4. The second stage was essentially the same as that of the CZ-4, except for an improved vehicle equipment bay. More...
  • CZ-4B Chinese orbital launch vehicle. The CZ-4B introduced in 1999 was an improved model of the CZ-4B with an enhanced third stage and fairing. It measured 44.1 metres in length with a first stage thrust of 300 tonnes. More...
  • CZ-4C Chinese orbital launch vehicle. The CZ-4C, first flown in 2007, had an upgraded second-stage engine that could be restarted in space. The vehicle also had structural rings at the base of the first and second stages, an interstage weather cover,ejected at liftoff, and the larger payload shroud introduced on the CZ-4B. All of these indicated that the vehicle was designed to take larger payloads to higher, more precise orbits than the CZ-4B. More...

Associated Manufacturers and Agencies
  • SAST Shanghai Academy of Spaceflight Technology, Shangai, China. More...

Bibliography
  • McDowell, Jonathan, Jonathan's Space Home Page (launch records), Harvard University, 1997-present. Web Address when accessed: here.
  • JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Web Address when accessed: here.

Associated Launch Sites
  • Jiuquan China's first launch center, also known as Shuang Cheng Tzu. Jiuquan Satellite Launch Centre, situated at 100 degrees East, 41 degrees North, is located in the Jiuquan Region, Gansu province, north-western China. It was China's first ballistic missile and satellite launch centre. More...
  • Taiyuan China's launch site for launch of polar orbiting satellites, also known as Wuzhai. Taiyuan Satellite Launch Center (TSLC) is situated in Kelan County, the northwest part of Shanxi Province, 280 km by road from Taiyuan City. More...

Yaogan Chronology


2006 April 26 - . 22:48 GMT - . Launch Site: Taiyuan. Launch Complex: Taiyuan LC1. LV Family: CZ. Launch Vehicle: CZ-4B. LV Configuration: Chang Zheng 4B CZ4B-9 (89).
  • Yaogan 1 - . Mass: 2,700 kg (5,900 lb). Nation: China. Agency: CNSA. Manufacturer: CASC. Class: Surveillance. Type: Military surveillance radar satellite. Spacecraft: Yaogan. USAF Sat Cat: 29092 . COSPAR: 2006-015A. Apogee: 630 km (390 mi). Perigee: 627 km (389 mi). Inclination: 97.8000 deg. Period: 97.30 min. Summary: Remote sensing satellite built by the Shanghai SAST Group. In reality it was the first Chinese synthetic aperture radar military surveillance satellite..

2007 May 25 - . 07:12 GMT - . Launch Site: Jiuquan. LV Family: CZ. Launch Vehicle: CZ-2D. LV Configuration: Chang Zheng 2D CZ2D-8 (99).
  • Yaogan 2 - . Mass: 2,700 kg (5,900 lb). Nation: China. Agency: CNSA. Manufacturer: CAST. Class: Surveillance. Type: Military surveillance radar satellite. Spacecraft: Yaogan. USAF Sat Cat: 31490 . COSPAR: 2007-019A. Apogee: 655 km (406 mi). Perigee: 631 km (392 mi). Inclination: 97.8000 deg. Period: 97.60 min. Summary: Second Chinese synthetic aperture radar military surveillance satellite..

2007 November 11 - . 22:48 GMT - . Launch Site: Taiyuan. LV Family: CZ. Launch Vehicle: CZ-4C. LV Configuration: Chang Zheng 4C CZ4C (104).
  • Yaogan 3 - . Mass: 2,700 kg (5,900 lb). Nation: China. Agency: SISE. Class: Surveillance. Type: Civilian surveillance radar satellite. Spacecraft: Yaogan. USAF Sat Cat: 32289 . COSPAR: 2007-055A. Apogee: 629 km (390 mi). Perigee: 628 km (390 mi). Inclination: 97.8000 deg. Period: 97.30 min. Summary: The military launch used a new version of the CZ-4 booster. The CZ-4C includes a restart capability in the upper stage and a new interstage adapter between the first and second stages..

2008 December 1 - . 04:42 GMT - . Launch Site: Jiuquan. LV Family: CZ. Launch Vehicle: CZ-2D. LV Configuration: CZ-2D s/n CZ2D10.
  • Yaogan Weixing 4 - . Nation: China. Agency: SISE. Class: Surveillance. Type: Military surveillance radar satellite. Spacecraft: Yaogan. USAF Sat Cat: 33446 . COSPAR: 2008-061A. Apogee: 654 km (406 mi). Perigee: 632 km (392 mi). Inclination: 97.9000 deg. Period: 97.60 min. Summary: Fourth 'Remote Sensing Satellite'; presumed military mission..

2008 December 15 - . 03:22 GMT - . Launch Site: Taiyuan. LV Family: CZ. Launch Vehicle: CZ-4B. LV Configuration: CZ-4B s/n CZ417.
  • Yaogan Weixing 5 - . Mass: 2,200 kg (4,800 lb). Nation: China. Agency: SISE. Class: Surveillance. Type: Military surveillance radar satellite. Spacecraft: Yaogan. USAF Sat Cat: 33456 . COSPAR: 2008-064A. Apogee: 496 km (308 mi). Perigee: 486 km (301 mi). Inclination: 97.4000 deg. Period: 94.40 min. One of the two different series of military surveillance satellites launched under the YW designation, although YW 5 was in a lower orbit similar to the ZY-2 satellites, lower than previous YW satellites. The launch vehicle was announced as a CZ-4B, but appeared to be a CZ-4B with the CZ-4C's restartable YF-40A upper stage under the larger CZ-4C nose fairing.

2009 April 22 - . 02:55 GMT - . Launch Site: Taiyuan. LV Family: CZ. Launch Vehicle: CZ-2C. LV Configuration: CZ-2C s/n CZ2-32.
  • Yaogan 6 - . Nation: China. Agency: SISE. Spacecraft: Yaogan. USAF Sat Cat: 34839 . COSPAR: 2009-021A. Apogee: 512 km (318 mi). Perigee: 512 km (318 mi). Inclination: 97.6000 deg. Period: 94.90 min.

2009 December 9 - . 08:42 GMT - . Launch Site: Jiuquan. LV Family: CZ. Launch Vehicle: CZ-2D. LV Configuration: CZ-2D s/n CZ2-34.
  • Yaogan Weixing 7 - . Nation: China. Agency: SISE. Spacecraft: Yaogan. USAF Sat Cat: 36110 . COSPAR: 2009-069A. Apogee: 659 km (409 mi). Perigee: 623 km (387 mi). Inclination: 97.8000 deg. Period: 97.50 min. Summary: Remote-Sensing Satellite, apparently a military optical surveillance satellite similar to YW-2 and YW-4..

2009 December 15 - . 02:31 GMT - . Launch Site: Taiyuan. LV Family: CZ. Launch Vehicle: CZ-4C. LV Configuration: CZ-4C s/n CZ4-18.
  • Yaogan Weixing 8 - . Mass: 1,040 kg (2,290 lb). Nation: China. Agency: SISE. Spacecraft: Yaogan. USAF Sat Cat: 36121 . COSPAR: 2009-072A. Apogee: 1,204 km (748 mi). Perigee: 1,193 km (741 mi). Inclination: 100.5000 deg. Period: 109.40 min. Summary: Sun-synchronous orbit low resolution imaging satellite, primarily for civilian Earth resource studies. Supplemental military missions may include weather forecasting..

2010 March 5 - . 04:55 GMT - . Launch Site: Jiuquan. LV Family: CZ. Launch Vehicle: CZ-4C. LV Configuration: CZ-4C s/n CZ4-19.
  • Yaogan 9A - . Mass: 2,800 kg (6,100 lb). Nation: China. Agency: SISE. Class: Military. Type: Electronic intelligence satellite. Spacecraft: Yaogan. USAF Sat Cat: 36413 . COSPAR: 2010-009A. Apogee: 1,107 km (687 mi). Perigee: 1,075 km (667 mi). Inclination: 63.4000 deg. Period: 107.10 min.
  • Yaogan 9B - . Nation: China. Agency: SISE. Class: Military. Type: Electronic intelligence satellite. Spacecraft: Yaogan. USAF Sat Cat: 36414 . COSPAR: 2010-009B. Apogee: 1,107 km (687 mi). Perigee: 1,075 km (667 mi). Inclination: 63.4000 deg. Period: 107.10 min.
  • Yaogan 9C - . Nation: China. Agency: SISE. Class: Military. Type: Electronic intelligence satellite. Spacecraft: Yaogan. USAF Sat Cat: 36415 . COSPAR: 2010-009C. Apogee: 1,107 km (687 mi). Perigee: 1,074 km (667 mi). Inclination: 63.4000 deg. Period: 107.10 min.

2010 August 9 - . 22:49 GMT - . Launch Site: Taiyuan. LV Family: CZ. Launch Vehicle: CZ-4C.
  • Yaogan 10 - . Payload: Yaogan Weixing 10. Nation: China. Agency: SISE. Class: Surveillance. Type: Civilian surveillance radar satellite. Spacecraft: Yaogan. USAF Sat Cat: 36834 . COSPAR: 2010-038A. Apogee: 630 km (390 mi). Perigee: 627 km (389 mi). Inclination: 97.8000 deg. Period: 97.30 min. Summary: Radar imaging satellite..

2010 September 22 - . Launch Site: Jiuquan. LV Family: CZ. Launch Vehicle: CZ-2D.
  • Yaogan 11 - . Payload: Zheda Pixing 1A. Nation: China. Agency: SISE. Class: Surveillance. Type: Surveillance satellite. Spacecraft: Yaogan. USAF Sat Cat: 37165 . COSPAR: 2010-047A. Apogee: 669 km (415 mi). Perigee: 626 km (388 mi). Inclination: 98.0000 deg. Period: 97.70 min. Summary: Carried earth imaging camera..

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