Status Report

ILS Proton to Launch AMC-12 Satellite

By SpaceRef Editor
January 29, 2005
Filed under , ,
Payload:                 AMC-12 communications satellite
                         Alcatel Space Spacebus 4000 platform
                         Separated spacecraft mass:  Approx.
                          10,966 lbs (4,974 kg)

Launch Vehicle:          Proton M/Breeze M
                         Weight at liftoff:  691,272 kg (1.5 million
                          lbs), including payload
                         Height: 61 m (200 ft)

Launch Date:             Feb. 3 (Baikonur, GMT)
                         Feb. 2 (U.S.)

Launch Window Opens:     7:27 a.m. Baikonur
                         2:27 GMT
                         9:27 p.m. EST

Launch Site:             Baikonur Cosmodrome, Kazakhstan
                         Launch Pad 24

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

Satellite Manufacturer:  Alcatel Space, Cannes, France

Launch Vehicle
Manufacturer:            Khrunichev State Research and Production
                         Space Center, Moscow

Launch Services
Provider:                International Launch Services (ILS), McLean,

Satellite Use:           Formerly called Worldsat-2, the AMC-12 is a
                         high-power C-band satellite with three
                         regional beams: North America, South America
                         and Europe/Africa.  It will support a wide
                         range of communications applications.

Satellite Statistics:    --  1st Spacebus 4000 to be launched
                         --  3 regional beams
                         --  72 C-band transponders
                         --  Orbital location:  37.5 degrees West
                         --  Anticipated service life of 16 years

Mission Profile:         The Proton launch vehicle will inject the
                         satellite into geosynchronous transfer orbit,
                         using a five-burn Breeze M mission design.
                         The first three stages of the Proton will use
                         a standard ascent trajectory to place the
                         Breeze M fourth stage, with the satellite,
                         into a suborbital trajectory, from which the
                         Breeze M will place itself and the spacecraft
                         into a support or reference orbit of 173 km
                         (107 miles), inclined at 51.5 degrees. Then
                         the satellite will be propelled to its
                         transfer orbit by additional burns of the
                         Breeze M.  Following separation from the
                         Breeze M, the spacecraft will perform a
                         series of liquid apogee engine burns to raise
                         perigee, lower inclination and circularize
                         the orbit at the geostationary altitude of
                         36,000 km (22,300 miles).

Target Orbit
at Separation:           Apogee: 35,786 km (22,236 miles)
                         Perigee:  6,400 km (3,977 miles)
                         Inclination: 18.3 degrees

Spacecraft Separation:   Approximately 9 hours, 20 minutes after

ILS Mission Statistics:  --  1st ILS Proton mission this year
                         --  5th ILS launch for SES AMERICOM in
                             12-month period
                         --  32nd ILS mission on Proton

                         NEWS MEDIA ACTIVITIES

Live Broadcast in U.S.:  AMC-4, transponder 17 C-band, 101 degrees
                         West, downlink 4040 MHz (vertical), analog.
                         Test signals start at 8:45 p.m. Feb. 2 EST.

In Europe, Russia &
Kazakhstan:              New Skies NSS-7, transponder ENV-1/EUH-1,
                         Channel 2, Ku-band; 338 degrees West;
                         bandwidth 9 MHz; FEC 3/4; downlink  10995.5
                         MHz (horizontal); symbol rate 6.1113.
                         Test signals start at  01:45 Feb. 3 GMT.

More Information:        Live webcast and general mission information
                         are available on the ILS web site at
                 Launch status updates are
                         available on the ILS U.S. domestic Launch
                         Hotline at 1-800-852-4980.

SpaceRef staff editor.