CBERS 1

Also called Zi Yuan 1

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General

Designation	25940 / 99057A
Launch date	14 Oct 1999
Country of origin	China / Brazil
Mission	Remote sensing
Perigee/Apogee	732/745 km, sun-synchronous
Inclination	98.6°
Period	repeat period: 20 days
Launch vehicle	Long March #56

Worth $150 million

Controlled from both Chinese and Brazilian ground stations. The WFI instrument failed after only 6 months.

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End of life

Out of service	Probable in 2003?
Cause
Decay

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External resources

sat-index articles

Technical data

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Specifications

Prime contractor	CASC/INPE
Platform
Mass at launch	1450 kg
Mass in orbit
Dimension	1.8 x 1.9 m
Solar array	8.3 x 3.3 m
Stabilization	3-axis
DC power
Design lifetime	2 years

Downlink freq: 180.011, 462.5 and 480.025 MHz. Other frequencies registered are 401.63, 2204.4, 2267.515, 8210 & 8209 MHz

In Oct 2001, the Chinese announce their instruments are still working.

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5-channel linear CCD detector (visible, IR, panchromatic)

Wavebands	0.59-0.89 µm 0.5-12.9 µm
Swath width	113 km
Resolution	Visible: 19 m IR: 80 m

Sideway pointing: +/- 32°

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Wide-field imager

Wavebands	0.66 µm (green) 0.83 µm (near IR)
Resolution	260 m
Swath width	890 km

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