CBERS-1

 1999-057A

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\imps{2.5}{images/99057A}

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ZY-1

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The 1540 kg China-Brasil Earth Resources Satellite 1, ZY-1 ("Resource") is built by CAST. Size is 1.8 x 2.0 x 2.0 m, 9.8m span box +1 panel.

The Chinese use the Xian control center, China; the Brazilian center is CRC/INPE, San Jose dos Campos.

From late October to early November the satellite's on board engine raised the orbit to sun-synchronous altitude. After that, very small orbital tweaks have maintained the altitude. In 2003 Aug the X-band transmitter failed, ending the mission. A slightly larger burn on 2003 Aug 13 marked the satellite's retirement, according to analyst Phillip Clark. The upper stage broke up into more than 125 pieces in Mar 2000.

In Mar 2007, more pieces were cataloged, but in the orbital plane of the payload, suggesting a separate event.

ZY-1
Date	Time	Event	Orbit
1999 Oct 14	0316	Launch by CZ-4B	TY
		T+2:33 Stage 1 MECO
		T+2:34 Stage 1 sep
		T+2:54 Fairing
		T+4:37 St 2 MECO
		T+4:47 St 2 VECO
		T+4:48 St 2 sep
		T+4:48 St 3 burn
	0327	T+11:18 St 3 MECO
	0328	T+12:28 ZY 1 sep
	0330?	T+12:55 SACI-1 sep
1999 Oct 20			99.54 727 x 746 x 98.6
		Cal burn	99.59 733 x 745 x 98.6
1999 Nov 3		Orbit raise	99.63 734 x 748 x 98.6
1999 Nov 5		Orbit raise	99.92 747 x 763 x 98.6
1999 Nov 6		Orbit raise	100.06 753 x 770 x 98.6
1999 Nov 8		Orbit raise	100.27 770 x 772 x 98.6
1999 Nov 9		Orbit raise	100.32 773 x 774 x 98.6
1999 Dec 17		Orbit trim	100.32 773 x 775 x 98.6
2000 Feb 28		Orbit trim
2000 Mar 29		Orbit trim
2000 Mar 11	1304	Stage 4 breakup
2000 Apr 22		Orbit trim
2000 Jun 23		Orbit trim
2000 Jun		WFI failed
2000 Aug 16		Orbit trim
2000 Nov 10		Orbit trim
2000 Dec 21		Orbit trim
2001 Feb 12		Orbit trim
2001 Apr 12		Orbit trim
2001 Jul 6		Orbit trim
2001 Oct 10		Orbit trim
2001 Nov 1		Orbit trim
2001 Dec 6			100.31 772 x 775 x 98.5
2001 Dec 6		Orbit trim	100.32 773 x 774 x 98.5
2003 Aug 13		X-band system failure	100.32 773 x 774 x 98.4
2006 Feb?		mv	100.41 774 x 782 x 98.4
2007 Mar		Objects released

Payload:

• Wide Field Imager, 860 km FOV with 260m res

• Hi Res CCD Camera, 20m res

• IR Multispectral Scanner, 80m res