| Ziyuan | |
| Country: | China, Brazil |
| Bus: | Phoenix-Eye |
| Applications: | Remote sensing Reconnaissance |
| Orbits: | Sun-synchronous |
| Operator: | CRESDA / INPE[1] People's Liberation Army |
| Lifetime: | 2-4 years |
| Derivatives: | CBERS |
| Status: | Operational |
| Built: | 15 |
| Orders: | 1 |
| Launched: | 15 |
| Operational: | 8 |
| Retired: | 5 |
| Failed: | 1 |
| Lost: | 1 |
| First: | Ziyuan I-01 14 October 1999 |
| Last: | Ziyuan I-02E 26 December 2021 |
Ziyuan is a series of remote sensing satellites operated by the People's Republic of China. Several Ziyuan satellites are operated jointly with Brazil's National Institute for Space Research under the China–Brazil Earth Resources Satellite program.
Ziyuan satellites are based on the Phoenix-Eye-1 or Phoenix-Eye-2 satellite buses - the Phoenix-Eye-1 is used for CBERS missions while the Phoenix-Eye-2 is used for the remaining satellites. The Ziyuan-II series satellites are operated by the Chinese military. The Ziyuan-III series satellites are operated by the Ministry of Natural Resources.
| Satellite | Launch date[2] | Rocket | Launch site | Status | Remarks | ||
|---|---|---|---|---|---|---|---|
| Ziyuan I series | |||||||
| Ziyuan I-01 (CBERS-1) | 25940 | 14 October 1999, 03:15 UTC | Retired 2003 | ||||
| Ziyuan I-02 (CBERS-2) | 28057 | 21 October 2003, 03:16 UTC | Retired 2007 | ||||
| Ziyuan I-02B (CBERS-2B) | 32062 | 19 September 2007, 03:26 UTC | Failed 2010 | ||||
| 38038 | 22 December 2011, 03:26 UTC | Operational | |||||
| Ziyuan I-03 (CBERS-3) | colspan=2 | 9 December 2013, 03:26 UTC | Launch failure | ||||
| Ziyuan I-04 (CBERS-4) | 40336 | 7 December 2014, 03:26 UTC | Operational | ||||
| Ziyuan I-04B (CBERS-4B) | 2018 | On order | |||||
| 44528 | 12 September 2019, 03:26 UTC | Launched | |||||
| Ziyuan I-04A (CBERS-4A) | 44883 | 20 December 2019, 03:22 UTC | Taiyuan LC-9 | Launched | |||
| 26 December 2021, 03:11 UTC | Taiyuan LC-9 | Launched | |||||
| Ziyuan II series | |||||||
| 26481 | 1 September 2000, 03:25 UTC | De-orbited 3 November 2016 | |||||
| 27550 | 27 October 2002, 03:17 UTC | De-orbited 22 January 2015 | |||||
| 28470 | 6 November 2004, 03:10 UTC | Presumed retired | |||||
| Ziyuan III series | |||||||
| 38046 | 9 January 2012, 03:17 UTC | Operational | |||||
| 41556 | 30 May 2016, 03:17 UTC | Launched[3] | |||||
| 45939 | 25 July 2020, 03:13 UTC | ||||||