Orbital Sciences Corporation
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©2014 Orbital Sciences Corporation FS005_08_2998
Intelsat 18
Mission Partners
Intelsat
Intelsat is a premier global provider of video and data services via
satellite
Orbital Sciences Corporation
Prime contractor for Galaxy 12, 14 and 15; Intelsat 11, 15, 16, 18,
23 and 28; Horizons-2 for an Intelsat/SKY Perfect JSAT joint venture
Launch Launch
Launch provider
The GEOStar
™
Advantage
Orbital’s highly successful Geosynchronous Earth Orbit (GEO)
communications satellites are based on the company’s GEOStar
spacecraft platform, which is able to accommodate all types of
commercial communications payloads and is compatible with all major
commercial launchers. The company’s GEOStar product line includes
the GEOStar-2 design, which is optimized for smaller satellite missions
that can support up to 5.0 kilowatts of payload power. Orbital has also
developed the higher-power GEOStar-3 spacecraft design, delivering the
next increment of payload power for applications between 5.0 and 8.0
kilowatts, allowing Orbital to offer its innovative and reliable satellite design
to the medium-class of communications satellites.
Specications
Spacecraft
Launch Mass: 3,200 kg (7,055 lb.)
Solar Arrays: Four panels per array, UTJ Gallium
Arsenide cells
Stabilization: 3-axis stabilized; zero momentum system
Propulsion: Liquid bi-propellant transfer orbit system;
monopropellant (hydrazine) on-orbit system
Batteries: Two >4840 W-Hr capacity Li-Ion batteries
Mission Life: 15 years
Orbit: 180
°
East Longitude
Hybrid Payload
C-band
Repeater: 24 active transponders with two groups of
16-for-12 redundant TWTAs
Antenna: 2.5 x 2.7 m single shell super-elliptical
deployable reector; 1.45 m deck-mounted
Ku-band
Repeater: 12 active transponders with two groups of
8-for-6 TWTAs
Antenna: 2.5 x 2.7 m single shell deployable reector
Launch
Launch Vehicle: Zenit
Site: Baikonur, Kazakhstan
Date: October 5, 2011
Coverage Contour Maps
C-band Coverage Areas Ku-band Coverage Areas
F1
F2
U.S. West
Northern Hemisphere
Southern Hemisphere
Global
(2 pages)
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