Brasilsat B4

Brazil


Spacecraft n:

Brazilian spacecraft n: 13

Also called SBTS B4 - Renamed: Star One B4

Launch data:

Designation 26469 / 00046A
Launch date17 Aug 2000 - 23:16 UT
Launch site Ko, ELA-2
Launch vehicleAriane-44LP (V131)
MissionCommercial: Communications
Geostationary orbit on:
Perigee / Apogee 35772 x 35800 km
Eccentricity 3.32E-04
Inclination 0.07 deg
Period 1436.09 min


Spacecraft data:

Prime manufactor Hughes
Platform HS-376W
Operator EMBRATEL / Star One (SES)
Mass at launch  2495 kg
Mass in orbit 1052 kg BOL
Basic shape  
Dimension (m) 
Equipment 28 active C-band transponders (all), 1 X-band transponder (#B1, 2 only)
Solar array Solar cells (body mounted and drop-skirt)
Stabilization  
Propulsion R-4D-11
DC power  1800 W (BOL)
Design lifetime  12 yrs

Location:

DatePositionRemarks
   92° W 
 Oct 2009  84.03° W 

Same as Brasilsat B3, will replace Brasilsat A2. Tested at 75°W.

C-band

Main transponders 28
Backup transponders  
Power 24 x 15.3 W
4 x 16.5 W
Bandwidth 27 x 36 MHz
1 x 33 MHz (1AE)
Coverage Brasil: National
Brasil: Regional
EIRP max 38 dBW
G/T max -2.5 dB/K
Polarization linear H/V

No X-band payload: the C-band only spacecraft will provide nearly 20 percent higher signal power than the 2 Brasilsat B's. It will have one C-band beam for national service, and a second C-band regional beam that will focus higher power on the major urban areas.

Beacon: 4.1985 & 4.1998 GHz horizontal

Transponder frequency chart (GHz)

Horizontal
Uplink
Horizontal
Downlink
Channel Vertical
Downlink
Vertical
Uplink
Beam
  3.6415 1AE   5.8665 Brasil: Regional or Brasil: National
5.885   1BE 3.660  Brasil: Regional or Brasil: National
  3.680 2AE   5.905 Brasil: Regional or Brasil: National
5.925   2BE 3.700  Brasil: Regional or Brasil: National
  3.720 1A   5.945 Brasil: National
5.965   1B 3.740  Brasil: National
  3.760 2A   5.985 Brasil: National
6.005   2B 3.780  Brasil: National
  3.800 3A   6.025 Brasil: National
6.045   3B 3.820  Brasil: National
  3.840 4A   6.065 Brasil: National
6.085   4B 3.860  Brasil: National
  3.880 5A   6.105 Brasil: National
6.125   5B 3.900  Brasil: National
  3.920 6A   6.145 Brasil: National
6.125   6B 3.940  Brasil: National
  3.960 7A   6.185 Brasil: National
6.205   7B 3.980  Brasil: National
  4.000 8A   6.225 Brasil: National
6.245   8B 4.020  Brasil: National
  4.040 9A   6.265 Brasil: National
6.285   9B 4.060  Brasil: National
  4.080 10A   6.305 Brasil: National
6.325   10B 4.100  Brasil: National
  4.120 11A   6.345 Brasil: National
6.365   11B 4.140  Brasil: National
  4.160 12A   6.385 Brasil: National
6.405   12B 4.180  Brasil: National

Voice and video communications to all of South America.
Ref.: #7(JR670), #15, #226 - update: 17.09.11 Home