ADVISORY/ILS to Launch AsiaSat 4 on Atlas III.

Business Editors

ADVISORY...for Thursday (April 10)

--(BUSINESS WIRE)

Payload:                AsiaSat 4
                        Geostationary communications satellite
                        Separated mass:  Approx. 8,911 lbs (4,042 kg)

Launch Vehicle:         Atlas III, designated AC-205
                        Weight at liftoff:  496,500 lbs (225,209 kg),
                        including payload
                        Fairing: 14 ft (4.2 m) diameter aluminum
                        Height: 175.7 ft (53.6 m)

Launch Date:            Thursday, April 10, 2003

Launch Window:          72 minutes
                        8:09-9-:21 p.m. April 10 EDT
                        00:09-01:21 April 11 GMT
                        8:09-9:21 a.m. April 11 Hong Kong

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

Customer:               Asia Satellite Telecommunications Co. Ltd.
                        (AsiaSat), Hong Kong

Satellite Manufacturer: Boeing Satellite Systems, El Segundo, Calif.

Launch Vehicle
Manufacturer:           Lockheed Martin Space Systems Co., Denver,
                        Colo.

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

Satellite Use:          High-powered satellite to deliver advanced
                        satellite services across Asia and
                        Australasia, including pan-Asian C-band beam
                        and Ku-band beams for direct-to-home and
                        broadband services to East Asia, Australasia
                        and Hong Kong.

Satellite Statistics:   -- Boeing 601HP model
                        -- Most powerful satellite in AsiaSat's fleet
                        -- 28 C-band and 20 Ku-band transponders
                        -- 122 degrees East longitude operating
                           position

Mission Profile:        This mission will use a parking orbit ascent
                        trajectory design with two Centaur burn
                        phases.  The vehicle will use both in-flight
                        retargeting and minimum residual shutdown to
                        inject the satellite into the best transfer
                        orbit possible. The satellite's own attitude
                        and orbital control system will perform a
                        series of burns to lower apogee and raise
                        perigee to geosynchronous altitude and reduce
                        inclination.

Spacecraft Separation:  About 31 minutes after liftoff

Orbital Parameters:     Apogee Altitude:     18,669 nm (34,575 km)
(@ Separation)          Perigee Altitude:    108.6 nm (201.1 km)
                        Inclination:         27 deg
                        Flight Azimuth:      96.7 deg

ILS Mission Statistics: -- 1st Atlas launch in 2003
                        -- 1st Atlas launch for AsiaSat
                        -- Atlas family has perfect record in 63
                           consecutive flights


                         NEWS MEDIA ACTIVITIES
             All times are EDT unless otherwise indicated

Media Briefing:         Pre-launch press conference at 8 a.m. on
                        launch day, Thursday, April 10, at the
                        Radisson Resort in Cape Canaveral.

Remote Camera Set-up:   9:30 a.m. Thursday, April 10.  Photographers
                        should meet at Cape Canaveral Air Force
                        Station Pass & ID Building for escort to
                        Pad 36.

Launch Viewing:         Accredited press covering the launch should
                        meet at the CCAFS Pass & ID Building at 6:30
                        p.m. Thursday, April 10, for Air Force escort
                        to Press Site 1.

Live Broadcast:         Launch program will be carried in the U.S. on
                        Galaxy III, transponder 1, C-band, 95 degrees
                        West, downlink frequency 3720 MHz
                        (horizontal).  Test signals begin about
                        7:15 p.m. EDT.

                        Live broadcast is also available in the Asia
                        Pacific region on AsiaSat 2, transponder 2A,
                        C-band, digital,100.5 degrees East, downlink
                        frequency 3700 MHz (vertical), QPSK, symbol
                        rate 6.1113 Msym/sec, FEC:  3/4.  Test signals
                        begin about 7:15 a.m. Hong Kong time.

More Information:       General mission information and a live webcast
                        of the launch  will be available on the ILS
                        website at www.ilslaunch.com. Launch status
                        updates will be available on the ILS U.S.
                        domestic Launch Hotline at 1-800-852-4980.