Asiasat 3S

China (PR)

Spacecraft nº:

Chinese spacecraft nº: 59

Launch data:

Designation	25657 / 99013A
Launch date	21 Mar 1999 - 0:09 UT
Launch site	Baikonur, LC81/23
Launch vehicle	Proton-K/DM3 (#265)
Mission	Commercial: Communications
Geostationary orbit:
Perigee / Apogee	35780 x 35792 km
Eccentricity	1.42E-04
Inclination	0.02 deg
Period	1436.07 min

Almost identical to Asiasat 3
A backup of this satellite was ordered to Hughes in Nov 1998. It is said to be identical to Asiasat 3S

Spacecraft data:

Primecontractor	Hughes --> Boeing Satellite Systems
Platform	HS-601HP
Operator	Asia Satellite Telecommunications Co. Ltd
Mass at launch	3480 kg
Mass in orbit	2500 kg
Dimension	stowed: 3.4 x 3.5 x 5.8 m
Solar array	26.2 m span
Stabilization	3-axis
DC power	9900 W
Design lifetime	15 years

Location:

Date	Position	Remarks
	105.5°E
Apr 2009	105.55° E

Tested at 98°E, went operational on 08 May 1999

C-band

Main transponders	28
Backup transponders	6
Power	55 W (TWTA)
Bandwidth	36 MHz
Coverage	Asia, the Indian subcontinent, the Middle East and Australia
EIRP max	40 dBW
G/T max	-1 dB/K
SFD	-98 dBW/m² (at G/T = -1 dB/K)
Polarization	linear H/V

beacons: 4.1995 & 4.2005 GHz

Transponder frequency chart (GHz)

Horizontal uplink	Horizontal downlink	Transponder	Vertical downlink	Vertical uplink
	3.640	1B		5.865
5.885		1A	3.660
	3.680	2B		5.905
5.925		2A	3.700
	3.720	3B		5.945
5.965		3A	3.740
	3.760	4B		5.985
6.005		4A	3.780
	3.800	5B		6.025
6.045		5A	3.820
	3.840	6B		6.065
6.085		6A	3.860
	3.880	7B		6.105
6.125		7A	3.900
	3.920	8B		6.145
6.165		8A	3.940
	3.960	9B		6.185
6.205		9A	3.980
	4.000	10B		6.225
6.245		10A	4.020
	4.060	11B		6.265
6.285		11A	4.080
	4.140	12B		6.305
6.325		12A	4.160
	4.120	13B		6.345
6.365		13A	4.140
	4.160	14B		6.385
6.405		14A	4.180

Ku-band

Main transponders	16
Backup transponders	4
Power	138 W (TWTA)
Bandwidth	54 MHz
Coverage	2 beams: 1 for China & 1 for India + 1 steerable beam
EIRP max	53 dBW
G/T max	6 dB/K
SFD	-100 dBW/m² (at G/T = 7 dB/K)
Polarization	linear H/V

Ku-band transponder frequency chart (GHz)

Horizontal uplink	Horizontal downlink	Transponder	Vertical downlink	Vertical uplink	beam
	12.280	1B		14.028	North
14.048		1A	12.300		North/South
	12.340	2B		14.088	North
14.108		2A	12.360		North/South
	12.400	3B		14.148	North
14.168		3A	12.420		North/South
	12.460	4B		14.208	North
14.228		4A	12.480		North/South
	12.520	5B		14.268	North
14.288		5A	12.540		North/South/Steerable
	12.580	6B		14.328	North
14.348		6A	12.600		North/South/Steerable
	12.640	7B		14.388	North
14.408		7A	12.660		North/South/Steerable
	12.700	8B		14.448	North
14.468		8A	12.720		North/South/Steerable

28 C-band, 16 Ku-band; broadcasting, internet services, multimedia, telecommunications

Ref.: #7, #15, #226 - update: 02.09.09