Eutelsat SESAT-1

EUTELSAT

Spacecraft n°:

EUTELSAT spacecraft n°: 18

SESAT stands for Siberian Europe Satellite

Launch data:

Designation	26243 / 00019A
Launch date	17 Apr 2000 - 21:06 UT
Launch site	B, LC-200/39
Launch vehicle	Proton-K/DM-2M (#274)
Mission	Telecommunications
Geostationary orbit on May 1.00, 2000:
Perigee / Apogee	35983 x 36023 km
Eccentricity	0.0005
Inclination	0.03 deg
Period	1447.17 min

Took over the Euteltracs service (fleet management). Replaced Eutelsat 2F3 on 8 Jun 2000.

The satellite is monitored by Sri Lanka Telecom for the Asian region.

Specifications

Prime contractor	NPO-PM / Alcatel Espace (payload)
Platform	derived from Express (MSS-2500-GSO)
Mass at launch	2600 kg
Mass in orbit
Basic shape	Cylindrical + 2 panels
Dimension	5m long, 2m dia
Solar array	26.5 m span
Stabilization	3-axis
DC power	5600 W (full eclipse protection)
Design lifetime	10 years

Location

Begin	End	Position
L: 17 Apr 2000	Jun 2000	39°E
Jun 2000		36°E
during Jan 2010	-	relocated from 36°E to 16°E

Ku-band

Main transponders	18
Backup transponders
Power	84 W (TWTA)
Bandwidth	72 MHz
Coverage	fixed beam: Europe steerable spot: currently for India
EIRP max	fixed: 47 dBW steerable: 49 dBW
G/T max	+4 dB/K
Polarization	linear
Frequencies	10.950-11.200 GHz (6 transp.) 11.450-11.700 GHz (6 transp.) 12.500-12.750 GHz (6 transp.)

Beacons: 11.45035, 11.19950 and 12.50100 GHz H

Ku-band Transponder frequency chart (GHz)

Horizontal Uplink	Horizontal Downlink	Transponder	Vertical Downlink	Vertical Uplink	Uplink beam	Downlink beam
	10.99167	B1		14.29167	Fixed	Fixed
14.29167		B2	10.99167		Fixed	Fixed
	11.07500	B3		14.37500	Fixed	Fixed
14.37500		B4	11.07500		Fixed	Fixed
	11.15833	B5		14.45833	Fixed	Fixed or steerable
14.45833		B6	11.15833		Fixed	Fixed or steerable

	11.49167	D1		13.79167	Fixed	Fixed or steerable
13.79167		D2	11.49167		Fixed	Fixed or steerable
	11.57500	D3		13.87500	Fixed or steerable	Fixed or steerable
13.87500		D4	11.57500		Fixed or steerable	Fixed or steerable
	11.65833	D5		13.95833	Fixed or steerable	Fixed
13.95833		D6	11.65833		Fixed or steerable	Fixed

	12.54167	F1		14.04167	Fixed or steerable	Fixed
14.04167		F2	12.54167		Fixed or steerable	Fixed
	12.62500	F3		14.12500	Fixed	Fixed
14.12500		F4	12.62500		Fixed	Fixed
	12.70833	F5		14.20833	Fixed	Fixed
14.20833		F6	12.70833		Fixed	Fixed

Mission details:

Formally sharing the 36° East orbital position with the W4 satellite, SESAT 1 has been redeployed to 16 degrees East following the entry into service of W7.
SESAT 1 has been co-located with the EUROBIRD™ 16 and W2M satellites to provide continuity of services at one of Eutelsat's most long-standing orbital positions, previously home to the W2 satellite.
16 degrees East is an important video location for satellite TV broadcasting to homes in Central and Eastern Europe, the Mediterranean Basin and the Middle East, as well as to islands in the Indian Ocean region. Seven pay-TV platforms and almost 400 TV channels are already broadcasting from this orbital location.

Ref.: #3(SD447), #7, #15, #206 - update: 10.07.11

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