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Asiasat 4



General


Designation 27718 / 03014A
Launch date 12 Apr 2003
Country of origin China
Mission Telecommunications
Geostationary orbit see below
Launch vehicle Atlas 3B #140

Cost: $220 million. Insured for launch and first year in orbit.

Was planned for late 1999, but was delayed because of the Asian crisis. Construction started in Sep 2000. Quite similar to Asiasat 3S.

Location


Begin End Position
L: Apr 2013 Dec 2017 122°E
Feb 2018   38°E


External resources


sat-index articles


Technical data


Lyngsat transponder loading



EIRP coverage (dBW)


C-band
Ku-band Australia
Ku-band North Asia

G/T coverage (dBW)


C-band
Ku-band North Asia

Specifications


Prime contractor Hughes
Platform HS-601HP
Mass at launch 4137 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 BOL: 9500 W
Design lifetime 15 years

Command omni beam: 6.6685 V, 6.4265 RHCP GHz
Command spot beam: 6.6685 V GHz

C-band


Main transponders 28
Backup transponders 6
Power 55 W (TWTA)
Bandwidth 36 MHz
Coverage 1 single beam: Asia, the Indian subcontinent, the Middle East and Australia
EIRP max 40 dBW
G/T max North Asia: 8.5 dB/K
Australia: 5.0 dB/K
SFD -98 dBW/m² (at G/T = -1 dB/K)
Polarization linear H/V

Omni beacons: 4.19825 H & 4.19925 H GHz
Spot beacons: 4.19825 H & 4.19925 H 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 1 (FSS)


Main transponders 16
Backup transponders 4
Power 140 W (TWTA)
Bandwidth 10 x 54 MHz
6 x 33 MHz
Coverage 2 beams: 1 for China & 1 for Australia and New Zealand
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 1 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

Ku-band 2 (BSS)


Main transponders 4
Backup transponders 2
Power 140 W (TWTA)
Bandwidth  
Coverage HongKong
EIRP max  
G/T max  
SFD  
Polarization RHCP
Frequencies 14/11 GHz


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