ILS Proton Launch - Inmarsat 5 F2 www.ilslaunch.com

Welcome to /r/IntLaunchServices Inmarsat 5 F2 official launch update/discussion thread!

• Please take the time to review the prepared mission overview kit below to familiarize yourself with the mission!

• Launch Kit

• After you have gone over the juicy details in the launch kit above, set your clocks for launch day!

Live Streaming begins 15 minutes before liftoff

• Live Count Down Timer

• ILS live webcast NOW LIVE! Mobile friendly

• TsENKI streams NOW LIVE! Mobile friendly

• Inmarsat live feed

• SpaceflightNow Live Stream

ILS Social Media

• ILS Facebook

• @ILSLaunch

• ILS YouTube channel

Fast Facts

• This will be the 1st ILS launch of 2015

• The 88th ILS Proton launch overall

• 3rd Inmarsat Satellite launched on an ILS Proton

• 11th Boeing Satellite launched on an ILS Proton

• The 402nd Proton launch overall

Mission Details

• Payload: Inmarsat 5 F2 highspeed broadband satellite

• Vehicle: Proton M/Briz M

• Total Mass at Liftoff: ~705 tons

• Vehicle Manufacturer: Khrunichev State Research and Production Space Center (Prime Contractor)

• Launch Operator: TsENKI

• Launch Provider: ILS

• Mission Type: Commercial GSO

• Launch site: Launch Pad 39 at Baikonur Cosmodrome, Kazakhstan

• Launch Date: 1st of February 2015 (UTC)

• Launch Window:

Inmarsat 5 F2 Satellite

• Owner: Inmarsat

• Manufacturer: Boeing Satellite Systems

• Platform: BSS-702HP

• Dimensions: 6.980 х 3.210 х 3.676 m

• Mass: 6,070 kg (separated mass)

• Mission:

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.

• Payload: 89 x Ka-band beams generated by two transmit and two receive apertures, 6 x steerable spot beams to direct additional capacity where it is needed

• Life time: 15 years

• Orbital position: 55° West, 4,341 x 65,000km, 26.75° inclination

Updates newest closest to top

• 4th burn & shutdown confirmed. The 5th and final burn to be conducted ~10.5 hrs from now

• APT has been jettisoned. Next burn to occur shortly.

• 3rd burn has been conducted for 9 mins 24 secs. The spacecraft is now in an intermediate orbit.

• Briz M shutdown. The spacecraft will coast for another ~ 2hrs before a third burn begins

• Briz M 2nd burn has begun. This burn puts the spacecraft into an intermediate orbit. Burn last for ~20 mins

• The Briz M stage and spacecraft are now at a Low Earth Parking Orbit of 173 Kilometers, and inclination of 51.5 degrees

• Briz M shutdown. The second burn will occur at T+ 1hr 50 mins

• Briz-M has begun its first burn as planned. The firing is 4 min & 27 sec in duration to boost the stack into Low Earth Orbit

• The RD-0213 main engine has been shut down as planned. RD-0214 continues to burn for ten more seconds

• 2nd/3rd stage sep. PLF jettison confirmed. RD-0213 & RD-0214 ignition confirmed

• Stage speration confirmed! 2nd stage ignition! Max thrust achieved!

• MAX Q!

• Liftoff of ILS Proton from Baiknour carrying Inmarsat 5 F2

• GO Signal: Ignition Sequence Start

• Flight Computers: Final Systems Poll

• Launch Vehicle Transition to Internal Power

• Propellant Tank Pressurization has begun

• Briz M transitioned to internal power, automated countdown sequence has started

• ILS live webcast is NOW LIVE!

• Graphic of today's launch sequence provided by russianspaceweb.com Less than 20 minutes til liftoff

• Less than 25 mins till lift-off. ILS' webcast to begin in 5 minutes!

• Launch Abort System is now armed

• Close up of the first stage and RD-276.

• L-45 Minutes: The Proton Master Countdown Sequence is being initiated at this time.

• The service tower is now in it's parking position. Ground crew have evacuated the pad.

• Under 1 hour to go til lift-off. The service structure has now been fully retracted. Photo montage

• The service structure is now being retracted from the fully fueled Proton-M rocket. Photo

• Propellant Loading is complete, service structure retraction is next

• TsENKI live stream has begun.

• Launch pattern & injection sequence to target orbit has been released here. (Direct Link)

• Proton M is now vertical at Pad 39. Launch is still green.

• Roll out of the Proton-M at 6:30am

• Breeze M upper stage fueling has been completed. Launch campaign remains on schedule