ADVISORY/ILS To Launch AMC-11 Satellite on Atlas.

News Editors/City Desks

ADVISORY...for Wednesday (May 19)

--(BUSINESS WIRE)

International Launch Services 

Payload:                    AMC-11
                            Lockheed Martin A2100 platform
                            Separated spacecraft mass:  Approx.
                             5,108 lbs (2,316 kg)

Launch Vehicle:             Atlas IIAS, designated AC-166
                            Weight at liftoff:  521,517 lbs
                             (236,556 kg), including payload
                            Fairing: 14 ft (4.2 m) diameter aluminum
                            Height: 155.5 ft (47.4 m)

Launch Date:                Wednesday, May 19, 2004

Launch Window:              174  minutes
                            5:52-8:46 p.m. EDT
                            2:52-5:46 p.m. PDT
                            2152-0046 May 19/20 GMT

Launch Site:                Cape Canaveral Air Force Station, Fla.
                            Launch Complex 36, Pad B

Launch Customer:            SES AMERICOM, Princeton, N.J.
                            Part of SES GLOBAL family of companies

Satellite Manufacturer:     Lockheed Martin Commercial Space Systems
                            Co., Sunnyvale, Calif., and Newtown, Pa.

Launch Vehicle
Manufacturer:               Atlas vehicle and Centaur upper stage
                            built by Lockheed Martin Space Systems in
                            Denver, Colo.; San Diego, Calif.; and
                            Harlingen, Texas.

Launch Services
Provider:                   International Launch Services,
                            McLean, Va.

Satellite Use:              Second of two C-band satellites that are
                            home to SES AMERICOM's premier cable
                            neighborhood, HD-PRIME, for digital
                            transmission across the United States.

Satellite Statistics:       -- Lockheed Martin A2100 model
                            -- 24 transponders at 36 MHz, 20 watts RF
                               power
                            -- Orbital location: 131 degrees West
                            -- 15 years mission life
                            -- 2nd launch of 5 AMC satellites on ILS
                               manifest in 2004

Mission Profile:            Standard Atlas IIAS ascent profile,
                            two-burn Centaur mission using a
                            guidance-commanded shutdown mission
                            design to inject the satellite into
                            geosynchronous transfer orbit.
                            Satellite's own attitude and orbital
                            control system will perform a series of
                            burns to raise perigee to geo-synchronous
                            altitude, circularize orbit and reduce
                            inclination.

Spacecraft Separation:      28 minutes after liftoff

Orbital Parameters:         Apogee Altitude:   19,420 nm (35,966 km)
(@ Separation)              Perigee Altitude:  101 nm (187 km)
                            Inclination:       12.4 deg
                            Flight Azimuth:    101.8 deg

ILS Mission Statistics:     -- 5th ILS mission this year
                            -- 7th satellite launched for SES AMERICOM
                               fleet by ILS
                            -- 29th Atlas IIAS vehicle
                            -- 14th ILS launch of A2100 model
                            -- Atlas family has perfect record in 71
                               consecutive flights


                         NEWS MEDIA ACTIVITIES
                           All times are EDT

Pre-launch Briefing:        11:30 a.m. Tuesday, May 18
                            Radisson Resort
                            Cape Canaveral, Fla.

Remote Camera Set-up:       8 a.m. Wednesday, May 19.  Accredited
                            photographers should meet at Cape
                            Canaveral Air Force Station Pass & ID for
                            escort to Complex 36.

Launch Viewing:             News media covering the launch should meet
                            at the CCAFS Pass & I.D. at 4:15 p.m.
                            Wednesday, May 19, for badging and Air
                            Force escort to Press Site 1.

Live Broadcast:             AMC-1, 103 degrees West
                            transponder 23, C-band, downlink 4160 MHz,
                             horizontal.
                            Test signals begin at 5:15 p.m.; program
                             at 5:30 p.m.
                            Broadcast will also be webcast at
                             www.ilslaunch.com.

More Information:           General mission information and launch
                            highlights will be available on the ILS
                            web site at www.ilslaunch.com.  Launch
                            status updates will be available on the
                            ILS U.S. domestic Launch Hotline at
                            1-800-852-4980.