Satellite News

Rocket: Proton M/Briz M; Payload: Inmarsat 5-F3; Date: 28 August, 1144 UTC; Launch site: Baikonur, Kazakhstan. The rocket lifted off as planned, and at the time of writing this the Briz M upper stage had successfully completed the second of five burns.

The U.S. Navy and Lockheed Martin are ready to launch the fourth Mobile User Objective System (MUOS) secure communications satellite, MUOS-4, here on Monday, 31 August aboard a United Launch Alliance Atlas V rocket. The launch window is between 1007 and 1051 UTC.

NASA has completed the first developmental test series on the RS-25 engines that will power the agency’s new Space Launch System (SLS) rocket.