Orbital SES-3 User Manual

GEO

Communications

SES-1, SES-2 and SES-3

Three Commercial Communications Satellites

FACTS AT A GLANCE

Mission Description

The SES program consists of three virtually identical satellites, SES-1, -2 and -3, built for SES. The

satellites, part of a 2007 contract for up to ve similar satellites, are hybrid C- and Ku-band spacecraft

that serve the CONUS and replace satellites currently in orbit. The satellites also incorporate a

redundant Ka-band payload. In addition, the SES-2 satellite incorporated the Commercially Hosted

InfraRed Payload (CHIRP) developed for the U.S. Air Force. A wide eld of view sensor was integrated

onto the satellite to validate missle warning technologies from geosynchronous orbit.

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.

Coverage:

CONUS

Mission:

C- and Ku-band communications for

North America, and Ka-band payload

Customer:

SES

SES-1 in Orbital's Dulles, Virginia satellite
manufacturing facility

SES-1, SES-2 and SES-3

Specications

Spacecraft

Launch Mass: 3,152 kg (6,949 lb.)

Solar Arrays: Four panels per array, UTJ Gallium Arsenide

cells

Stabilization: 3-axis stabilized

Propulsion: Monopropellant (hydrazine) on-orbit system

Batteries: Two >4840 W-Hr capacity Li-Ion batteries

Mission Life: 15 years

Payload

Ku-band

Repeater: Two groups of 16-for-12 linearized TWTAs

TWTA Power: 90 W RF

Antenna: 2.3 m dual grid shaped deployable reector

C-band

Repeater: Two groups of 16-for-12 SSPAs

SSPA Power: 20 W RF

Antenna: 2.3 m dual grid shaped deployable reector

Ka-band

Repeater: 2-for-1 TWTA

TWTA Power: 39 W RF

Antenna: Receive and transmit horns

Mission Partners

SES

A leading global satellite operator providing a broad range of

communications services

Orbital Sciences Corporation

Prime contractor for the SES program

Coverage Contour Maps

C-band 101° West Longitude

Ku-band 101

°

West Longitude

Launch

SES-1: Proton, April 24, 2010

SES-2: Ariane 5, September 21, 2011

SES-3: Proton, July 16, 2011

Orbital Sciences Corporation

45101 Warp Drive

©2014 Orbital Sciences Corporation FS005_07_2998

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Dulles, Virginia 20166

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www.orbital.com