Inmarsat’s luck holds good as Proton M successfully launches Inmarsat 5F-3

by | Aug 29, 2015 | commercial launch services, Launches, Russia, Satellites, Seradata News | 0 comments

While it may have rued the one-year delay in completing its Global Xpress high-speed mobile broadband data constellation, mainly due to Proton launch failures, Inmarsat’s luck at least held for the Proton M/Breeze M launch of its own Inmarsat 5F-3 communications satellite.  The launch, which was actually a return to service for Proton M after a launch failure in May, took place from the Baikonur Cosmodrome, near Tyuratam in Kazakhstan, at 1144 GMT on 28 August 2015.  Despite the first burn of the Breeze M upper stage reported as being one second too short, and its second burn being one second too long, the launch was adjudged a complete success.

The flight was flown under International Launch Services (ILS), the commercial marketing arm of Khrunichev, the Proton’s main manufacturer.  The five burns by the Breeze M upper stage put the spacecraft and Breeze M assembly, first into a circular parking orbit then into an intermediate orbit, followed by an initial transfer orbit.  The spacecraft was finally released into a 65,000 x 4,341km, 26.75 degree inclination super synchronous transfer orbit 15 hours after launch.   The remaining inclination will be removed by the spacecraft’s own apogee kick motor during manoeuvres to circularise the orbit into Geostationary Earth Orbit (GEO).

The satellite carries a communications payload of 89 Ka-band fixed beams and 6 steerable ones. In addition to its main communications payload, Inmarsat 5F-3 is carrying a hosted Ka-band and L-band payload for the US Government.

While three satellites will provide global coverage for the Global Xpress high-speed communications network, Inmarsat is planning to launch one more satellite into the system, Inmarsat 5F-4, which will act as supplementary satellite and as an in orbit back-up.  All four satellites have been built by Boeing, using its BSS-702HP satellite bus design.

The spacecraft was insured for launch.  Inmarsat is famous for “dodging bullets” as the only major satellite operator yet to have had an insurance loss.

 

About Seradata

Seradata produce the renowned SpaceTrak Launch & Satellite Database. Trusted by 100 of the world’s leading Space organisations, SpaceTrak is a fully queryable database used for market analysis, failure/risk assessment, spectrum analysis and space situational awareness (SSA).

For more information go to www.seradata.com/spacetrak

Related Articles

Nauka module limps towards ISS after suffering multiple issues in orbit following successful Proton launch (Updated)

The newest ISS module, known as Nauka, was launched from Baikonur Cosmodrome, Kazakhstan, by a Proton M at 1458 GMT Read more

Proton M flies Eutelsat 5 West B comsat and MEV-1 servicing spacecraft into orbit…then ILS President Kirk Pysher resigns

A Proton M/Briz M vehicle was launched at 1017 GMT on 9 October from Baikonur Cosmodrome near Tyuratam in Kazakhstan. Read more

BLAGOVEST 4 comms satellite launched for Russia by Proton-M

At 2156 GMT, 5 August 2019, a Russian Proton-M rocket, with Briz-M upper-stage, lifted-off from the Baikonur Cosmodrome, Kazakhstan, carrying Read more

Proton M successfully lofts Asiasat 9 comsat into orbit

In the colours of an ILS (International Launch Services) flight, a Proton M rocket successfully ignited and lifted off from its Read more

ILS workhorse Proton-M successfully launches Amazonas 5

International Launch Services (ILS) used its workhorse rocket, the Russian-built Proton M, to successfully launch the Amazonas 5 communications satellite in a Read more

100th flight of the Proton-M rocket orbits joint military-commercial BLAGOVEST-1

At 2207 GMT, 16 August, a Russian Proton-M heavy-lift rocket lifted off from Site 81 (Pad 24), Baikonur Cosmodrome, Kazakhstan Read more

Khrunichev to “modularise” Proton rocket to enter medium and small launcher markets

International Launch Services (ILS), the commercial marketing arm of the Russian rocket manufacturer Khrunichev, has announced that the Proton four-stage rocket is Read more

Old Proton Ullage motor explodes causing debris

At 0920 GMT on 1 June, a stage that was used as an earlier alternative to the Breeze M on Proton Read more

Categories

Archives