Chinasat 20

 2003-052A

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CAST/CASTC DFH-3. According to sinodefense.com, this satellite was Shen Tong 1 and used for Ku-band mobile strategic communications.

\uni{ 神通一号}{ }

Mass 2300 kg. Served at 103E from 2003 to 2008, then at 98E.

In 2008, ZX-20 and ZX-22A exchanged positions `due to the needs of users'. In 2013, ZX-22A moved slightly and ZX-20 returned to the 103E position.

ZX-20
Date	Time	Event	Orbit
2003 Nov 14	1601	Launch by CZ-3A	XSC
		T+2:25 Stage 1 MECO
		T+2:27 Stage 2 MES, Stage 1 sep
		T+3:52 Fairing sep
		T+4:15 St 2 MECO
		T+4:20 St 2 VECO
		T+4:21 St 2 sep, St 3 MES
	1611?	T+10:19 St 3 MECO-1	200 x 200 x 28.5?
	1621?	T+20:00 St 3 MES-2
	1623?	T+22:00 St 3 MECO-2
	1625?	Stage 3 sep	212 x 41981 x
2003 Nov 14			754.15 198 x 41934 x 24.98
2003 Nov 20			1435.96 35770 x 35796 x 0.31 GEO 103.0E
2003 Nov 26			1436.00 35775 x 35793 x 0.29 GEO 103.0E
2006 Aug 8			1436.13 35770 x 35804 x 0.1 GEO 103.0E
2008 Jun 7			1436.12 35781 x 35793 x 0.1 GEO 103.4E
2008 Jun 24		Still tracked at 103E (error?)
2008 Jun 25		Move in at 98E	1436.13 35777 x 35796 x 0.1 GEO 98.1E
2011 Oct 19			1436.03 35775 x 35795 x 0.0 GEO 98.1E
2012 Nov		NSSK ends
2013 Apr 6			1436.07 35763 x 35808 x 0.4 GEO 98.0E
2013 Apr 17		Move out, drift E
2013 May 11		Move in at 103.2E
2013 May 20			1436.01 35773 x 35796 x 0.5 GEO 103.2E
2015 Nov 15			1436.12 35765 x 35808 x 1.4 GEO 103.3E
2017 Dec 19			1436.19 35768 x 35808 x 3.9 GEO 103.1E