F4 News

Inmarsat, a provider of global mobile satellite communications, has confirmed the successful launch of the fourth, high-speed broadband communications satellite in its transformational Global Xpress (GX) constellation. Inmarsat GX is the world’s first globally available, broadband connectivity service and was created to enable communities across the world to benefit from the emerging digital society. Inmarsat-5 F4 (I-5 F4) was launched by SpaceX on a Falcon 9 rocket at 00:21 (BST) / 19:21 (ET) from the historic launch pad 39A at NASA’s Kennedy Space Center in Florida.

Inmarsat has provided an initial update on the launch schedule for Inmarsat-5 F3 (I-5 F3) following the failure of the preceding Proton Breeze M launch from the Baikonur Cosmodrome in Kazakhstan on Saturday 16 May. According to an announcement by Inmarsat’s launch partner, ILS, the Proton Breeze M rocket carrying the Centenario satellite suffered a disabling anomaly during the operation of the third stage, approximately eight minutes after lift-off, resulting in the loss of the satellite and rocket. A Russian State Commission has begun the process of determining the reasons for the failure. In parallel with the State Commission, ILS will form its own Failure Review Oversight Board, which will review the State Commission’s final report and corrective action plan, in accord with U.S.

Inmarsat provider of global mobile satellite communications services, confirms the successful launch of Alphasat, the largest satellite, designated I-4A F4. Alphasat was launched on an Ariane 5 ECA, the latest version of the Ariane 5 launcher, from the Guiana Space Centre in Kourou, French Guiana at 20.54hrs BST on 25th July (16.54hrs Kourou local time). Arianespace confirmed a successful spacecraft separation at 27 minutes 45 seconds after launch and the Alphasat Mission Operations Team confirmed telemetry reception and that they have command of the satellite at 21.47 BST.