Asiasat 3S

China (PR)

Spacecraft nº:

Chinese spacecraft nº: 59


Launch data:

Designation 25657 / 99013A
Launch date 21 Mar 1999 - 0:09 UT
Launch siteBaikonur, LC81/23
Launch vehicleProton-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:

DatePositionRemarks
  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 Home