Status Report

ILS To Launch Inmarsat Satellite On Atlas V

By SpaceRef Editor
March 9, 2005
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ILS To Launch Inmarsat Satellite On Atlas V

Media Advisory

Payload: Inmarsat 4-F1

  • Geosynchronous multi-use communications satellite
  • Separated mass: Approx. 5,945 kg (13,106 lbs)
  • Launch Vehicle: Atlas V, 431 configuration, designated AV-004
  • 4-meter diameter (13.75 ft) Extra Extended Payload Fairing (13.8 m/45.4 ft)

3 strap-on solid rocket boosters, built by Aerojet, Sacramento, Calif.

Single-engine Lockheed Martin Centaur upper stage RD-180 main engine, from Pratt & Whitney/Energomash

Weight at liftoff: 479,699 kg (1,057,575 lbs) with payload

Height: 59 m (194 ft)

Launch Date: Thursday, March 10, 2005

  • Launch Window: 15 minutes
  • 4:42-4:57 p.m. EST
  • 21:42-21:57 GMT
  • Launch Site: Cape Canaveral Air Force Station, Fla.
  • Launch Complex 41
  • End User: Inmarsat Ltd., London
  • Satellite Manufacturer: EADS Astrium, Toulouse, France 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: First in next generation of satellites, which will support Inmarsat’s new Broadband Global Area Network (BGAN), delivering internet and intranet content and solutions, video-on-demand, videoconferencing, fax, e-mail, phone and LAN access at speeds up to 432kbit/s almost anywhere in the world. BGAN will also be compatible with third-generation cellular systems.
  • Satellite Statistics: Eurostar E3000 model

Largest and most powerful commercial communications satellite launched by
Atlas to date

C- and L-band

Capability for more than 200 spot beams

Operating position 65 degrees East longitude

13 years targeted lifetime

  • Mission Profile: Atlas V will place Inmarsat 4-F1 into orbit with a super-synchronous transfer orbit mission, using a parking orbit ascent trajectory design with two Centaur burn phases. The mission employs a guidance-commanded shutdown. The satellite’s own attitude and orbital control system will perform a series of burns to lower apogee and raise perigee to geosynchronous altitude, circularize orbit and reduce inclination.
  • Spacecraft Separation: About 32 minutes after liftoff
  • Orbital Parameters (@ Separation):
  • Apogee Altitude: 48,864 nm (90,497.5 km)
  • Perigee Altitude: 237.6 nm (4,40 km)
  • Inclination: 20.83 deg
  • ILS Mission Statistics:
  • 5th commercial flight of Atlas V

2nd Atlas flight in 2005

3rd ILS mission this year

Atlas family has perfect record in 75 consecutive flights


All times are EST unless otherwise indicated

  • Remote Camera Set-up: Meet at Cape Canaveral Air Force Station Pass & ID at 4 p.m. Wednesday, March 9, for transfer to van that will take you to Pad 41. Media Briefing: Pre-launch news conference at 11:30 a.m. Wednesday, March 9, at the Florida Space Authority building, 100 Spaceport Way, outside CCAFS Gate 1.
  • Vehicle Rollout: The new meet time at Pass & ID is 5:30 a.m. Access is limited to 15 journalists and reservations are required by contacting Julie Andrews of Lockheed Martin at 321-853-1567.
  • Launch Viewing: Media should meet in the parking lot of the Florida Space Authority, just beyond our usual spot at Pass & ID, at 2:45 pm Thursday. This is to keep us clear of the buses that will be gathering for the guests. We will be using the Kennedy Space Center Press Site.
  • Live Broadcast: In the U.S., Intelsat IA-6, transponder 9, C-band, 93 degrees West, downlink frequency 3880 MHz (vertical).
  • In Europe, Newskies NSS 7, transponder ENV1/EUH1 Ch 2, Ku-band, 338 degrees East, downlink frequency 10995.50 (horizontal); symbol 6.1113, FEC 3/4

Test signals begin about 4 p.m. EST (21:00 GMT).

More Information: General mission information and a live webcast of the
launch will be available on the ILS website at Launch
status updates will be available on the ILS U.S. domestic Launch Hotline at

SpaceRef staff editor.