Press Release

Media Advisory: ILS Proton to Launch JCSAT-11

By SpaceRef Editor
August 30, 2007
Filed under , ,

Payload: JCSAT-11, A2100 AX platform

Separated Mass: Approx. 4,000 kg (8,818 lbs)

Launch Vehicle: Proton M/Breeze M

Weight at Liftoff: 691,272 kg (1.5 million lbs), including payload

Height: 57.2 m (186.6 ft)

Launch Time: 04:43 Sept. 6 Baikonur; 07:43 Sept. 6 Tokyo; 22:43 Sept. 5 GMT; 18:43 Sept. 5 EDT

Launch Site: Baikonur Cosmodrome, Kazakhstan, Launch Pad 39

End User: JSAT Corporation, Tokyo, Japan

Satellite Manufacturer: Lockheed Martin Commercial Space Systems, Newtown, Penn.

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

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

Satellite Use: Multipurpose communications satellite to serve as a backup satellite for the JSAT fleet. It will provide coverage over Japan, the Asia-Pacific region, Oceania and Hawaii.

Satellite Statistics:

  • 30 active Ku-band transponders
  • 12 active C-band transponders
  • In-orbit backup satellite
  • Anticipated service life of 15 years

Mission Profile: The Proton launch vehicle will inject the satellite into geosynchronous transfer orbit, using a four-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 circular reference, or parking, orbit of 192 km (119.3 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 35,786 km (22,236 miles).

Target Orbit at Separation: Apogee: 35,786 km (22,236 miles); Perigee: 5,032 km (3,139 miles); Inclination: 21.4 degrees

Spacecraft Separation: Approximately 6 hours, 56 minutes after liftoff

ILS Mission Statistics:

  • 1st Proton launch for Japanese customer
  • 3rd ILS mission for 2007
  • 42nd ILS mission on Proton
  • 9th Proton launch of A2100 bus
  • 327th Proton launch

Live Broadcast in North America: Galaxy 26, transponder 9, 93 degrees West, C-band, analog NTSC, downlink 3880 MHz (vertical). Test signals start at 6 p.m. EDT.

Live Feed for Europe and Asia: New Skies NSS-7, transponder NAV6/EUH6, 338 degrees West, Ku-band, digital PAL downlink 11534.65 MHz (horizontal), symbol rate 2.46, fec: 3/4. Test signals start at 2200 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.

Contact: Fran Slimmer, ILS, McLean, Va.;1-571-633-7462, mobile: +1-646-229-4801;

SpaceRef staff editor.