Earth Science
China Aerospace Science and Technology Corporation(CASC)GovernmentThe ZY-3 (Ziyuan-3, 'Resource-3') series represents China's first high-resolution, stereoscopic mapping satellites for civilian use. The second satellite is managed by the Satellite Surveying and Mapping Application Center (SASMAC). The imaging payload consists of a three-line camera array and a multispectral imager. The three-line panchromatic camera array to acquire stereoscopic imagery consists of three telescopic cameras with one oriented to the nadir and the other two each offset by 22° forward and backward in flight direction. The stereo mapping camera of ZY-3 has a resolution of 2.1 m for the nadir camera, and 2.6 m for the offset cameras. The swath width is 51 km. The multispectral imager for environmental and vegetation monitoring consists of a three-mirror telescope and a cooled detector system sensitive to four wavelength bands to capture full-color imagery as well as near-infrared data. The ground resolution of this system is 5.8 m.
Orbital Attempt
#7,156
CASC Mission
#564
Pad Launch
#77
Location Launch
#149
Designator
2025-300
Dec 16, 2025, 3:17 AM
Minute
1 update
3:10 AM
Window Open
3:39 AM
Window Close
The Long March 4B (Chinese: 长征四号乙火箭), also known as the Chang Zheng 4B, CZ-4B and LM-4B is a Chinese orbital carrier rocket. Launched from Launch Complex 1 at the Taiyuan Satellite Launch Center, it is a 3-stage rocket, used mostly to place satellites into low Earth and sun synchronous orbits.
Length
44.1 m
Diameter
3.35 m
Launch Mass
249 t
Thrust
2,961 kN
LEO Capacity
4,200 kg
GTO Capacity
1,500 kg
Reusable
No
Maiden Flight
1999
Fastest Turnaround
5d 21h
Total Launches
56
Successful
55
Failed
1
Consecutive Success
36
Maiden flight: May 10, 1999
The China Aerospace Science and Technology Corporation (CASC) is the main contractor for the Chinese space program. It is state-owned and has a number of subordinate entities which design, develop and manufacture a range of spacecraft, launch vehicles, strategic and tactical missile systems, and ground equipment. It was officially established in July 1999 as part of a Chinese government reform drive, having previously been one part of the former China Aerospace Corporation. Various incarnations of the program date back to 1956.
Founded
1999
Administrator
Chairman & President: Lei Fanpei
Total Launches
592
Successful
577
Failed
15
Pending
9
Consecutive Success
18
The Taiyuan Satellite Launch Center is a People's Republic of China space and defense launch facility. It is situated in Kelan County, Xinzhou, Shanxi Province and is the second of four launch sites having been founded in March 1966 and coming into full operation in 1968.
Timezone
Asia/Shanghai
Local Launch Time
Dec 16, 2025, 11:17 AM
Total Launches
155
Total Landings
0
Coordinates
38.8491, 111.6080