# Long March 4B | Ziyuan-3-04: launch

> Long March 4B by China Aerospace Science and Technology Corporation from Taiyuan Satellite Launch Center, People's Republic of China. Flown: Success.

- Canonical page: https://spacenexus.us/launch/cmtdf0ug80017oqhxcecmjhdf
- This Markdown version: https://spacenexus.us/launch/cmtdf0ug80017oqhxcecmjhdf.md
- Data as of: 2026-10-13 01:45 UTC (last Launch Library 2 sync)
- How the numbers are made: https://spacenexus.us/launch-slips/method

## Facts

- Launch: Long March 4B | Ziyuan-3-04
- Mission: Ziyuan-3-04
- Provider: China Aerospace Science and Technology Corporation
- Rocket: Long March 4B
- Pad: Taiyuan Satellite Launch Center, People's Republic of China
- Country of the launch site: CHN
- Date (UTC): Tue, Dec 16, 03:17 UTC (2025-12-16T03:17:00.000Z)
- Launch window: 2025-12-16 03:10 UTC to 2025-12-16 03:39 UTC
- Status: completed (Launch Library 2: Success)
- Outcome: Success
- Real slips recorded: 0; other date moves (placeholder rolls, firmings), not slips: 0

## Mission description

Quoted from Launch Library 2: The 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.

## Date history

No date change recorded for this launch since our ledger began.

## Sources

- [Launch Library 2 by The Space Devs](https://thespacedevs.com): launch names, providers, rockets, pads, dates and status
- [SpaceNexus Launch Ledger (our own record of every date change)](https://spacenexus.us/launch-slips/method)
- [Mission information (link from Launch Library 2)](https://www.spacelaunchnow.me/launch/long-march-4b-ziyuan-3-04)

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