Brasilsat-B3

Brazil

Spacecraft n°:

Brazilian spacecraft n°: 8

Also called SBTS B3 - Renamed: Star One B3

Launch data:

Designation	25152 / 98006A
Launch date	04 Feb 1998
Launch site	Ko, ELA-2
Launch vehicle	Ariane-44LP (V105)
Mission	Commercial: Communications
Geostationary orbit on:
Perigee / Apogee	35769 x 35803 km
Eccentricity	4.03E-04
Inclination	0.04 deg
Period	1436.07 min

Spacecraft data:

Prime manufactor	Hughes
Platform	HS-376W
Operator	EMBRATEL / Star One (SES)
Mass at launch	1780 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:

Begin	Position	Remarks
L: 04 Feb 1998	65°W
late May 1998	84°W
04 Aug 2008		drifting to the East
Oct 2009	74.96° W

This is an amendment to the Brasilsat B contract with Hughes signed in 1990, which gave EMBRATEL options for additional spacecraft.

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 & 4.1995 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

28 C-band transponders for voice and video communication.

Ref.: #7(JR670), #15, #225, #226 - update: 17.09.11

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