Intelsat 18 – Orbital Intelsat 18 User Manual

Page 2

Orbital Sciences Corporation

45101 Warp Drive

•

Dulles, Virginia 20166

•

www.orbital.com

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.

Specifications

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 reflector; 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 reflector

Launch

Launch Vehicle:

Zenit

Site:

Baikonur, Kazakhstan

Date:

October 5, 2011

Coverage Contour Maps

C-band Coverage Areas Ku-band Coverage Areas

U.S. West

Northern Hemisphere

Southern Hemisphere

Global