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Satnews Daily
January 28th, 2015

ILS Proton Preps ...First Globally Available High-Speed Broadband Network Over Three Inmarsat-5 Sats

[SatNews] ILS readies for their upcoming launch  of Inmarsat-5 F2, on February 1, 2015 at  6:31pm from Pad 39 at Baikonur Cosmodrome, Kazakhstan.

Mission Description: The Proton M launch vehicle, utilizing a 5-burn Breeze M Supersynchronous Transfer Orbit mission design, will lift off from Pad 39 at Baikonur Cosmodrome, Kazakhstan, with the Inmarsat-5 F2 satellite on board. The first three stages of the Proton will use a standard ascent profile to place the orbital unit (Breeze M upper stage and the Inmarsat-5 F1 satellite) into a sub-orbital trajectory. From this point in the mission, the Breeze M will perform planned mission maneuvers to advance the orbital unit first to a circular parking orbit, then to an intermediate orbit, followed by a transfer orbit, and finally to a supersynchronous transfer orbit. Separation of the Inmarsat-5 F2 satellite is scheduled to occur approximately 15 hours, 31 minutes after liftoff. 

Provider: International Launch Services, Virginia, USA

Satellite Use: Inmarsat Global Xpress (GX) will be the first globally available high-speed broadband network. It will be delivered over three Inmarsat-5 satellites and will offer the unique combination of global coverage from a single operator and the network reliability for which Inmarsat is renowned. Based on Ka-band technology, GX will consistently deliver higher performance through more compact terminals at a lower cost than existing VSAT services, making it accessible to many more users. 

Satellite Statistics:            

  • 89 ka-band transponders
  • Planned orbital location: 55 degrees W
  • Anticipated service life: 15 years                 

Target Orbit at Separation:         

  • Perigee: 4,341km
  • Apogee: 65,000 km
  • Inclination: 26.75 degrees 

Spacecraft Separation: Approximately 15 hours, 31 minutes after lift-off

ILS Mission Statistics:     

  • 1st ILS Proton Launch in 2015
  • 88th ILS Proton Launch Overall
  • 11th Inmarsat Satellite Launched on Proton
  • 17th Boeing Satellite Launched on Proton


Live Broadcast:                 

  • Live Coverage starting at 07:15 EST/ 12:15 GMT
  • Launch is scheduled for 07:31 EST/ 12:31 GMT
  • Broadcast concludes no later than 08:00 EST/ 13:00 GMT


Webcast can be seen at: http://inmarsat5f2.imgondemand.com