MUOS-4 Completes On-Orbit Testing Ahead of Operational Acceptance Next Spring

File photo of the U.S. Navy’s MUOS-4 satellite, which this week completed on-orbit testing and was officially accepted by the Navy to go operational next spring. Photo Credit: Lockheed Martin

The fourth in a Lockheed Martin-built five-ship fleet for a next-generation, narrowband tactical military satellite communications system was officially accepted by the U.S. Navy […]

ULA Atlas-V Propels MUOS-4 Satellite Into Space, Air Force and Congress Shudder Over Threats to Russian RD-180

A ULA Atlas-V 551 rocket launches the Navy’s MUOS-4 satellite to orbit from Cape Canaveral, Fla., on Sept. 2, 2015. Photo Credit: John Studwell / AmericaSpace

A Russian RD-180-powered United Launch Alliance (ULA) Atlas-V 551 rocket successfully launched the 7.5-ton Lockheed Martin/Navy Mobile User Objective System (MUOS 4) satcom into geosynchronous transfer orbit early […]

Fourth Navy MUOS Launch Readied for Wednesday Amid GAO Concerns About Project

ULA’s most powerful Atlas-V rocket, the Atlas 551, standing tall atop SLC-41 for a Wednesday morning launch attempt. Photo Credit: ULA

A United Launch Alliance (ULA) Atlas-V rocket is poised to fire the Navy’s Mobile User Objective System (MUOS-4) satellite into geosynchronous transfer orbit from Cape Canaveral Air Force Station, Fla., as early as […]

Navy’s MUOS-4 Hoisted Atop ULA’s Most Powerful Atlas Rocket for Launch Next Week

The U.S. Navy’s fourth Mobile User Objective System (MUOS) satellite, encapsulated in a 5-meter payload fairing, is mated to an Atlas V booster inside the Vertical Integration Facility at Cape Canaveral’s Space Launch Complex-41. Credits: ULA

The fourth in a Lockheed Martin-built, five-ship fleet for a next-generation, narrowband tactical military satellite communications system is […]

Navy's MUOS-4 Encapsulated for Launch on ULA's Most Powerful Atlas-V Rocket Aug. 31

MUOS-4, the next satellite scheduled to join the U.S. Navy’s Mobile User Objective System (MUOS) secure communications network, has been encapsulated in its protective launch vehicle fairing for its Aug. 31 launch from Cape Canaveral Air Force Station. Photo Credit: ULA

The fourth in a Lockheed Martin-built, five-ship fleet for a next-generation, narrowband tactical […]

NAVY's 7.5-Ton MUOS-4 Satellite Arrives in Florida for August Launch on Most Powerful Atlas-V

On June 28, MUOS-4, the next satellite scheduled to join the U.S. Navy’s Mobile User Objective System (MUOS) secure communications network, shipped to Cape Canaveral from Lockheed Martin’s satellite manufacturing facility in Sunnyvale, Calif. Launch is currently scheduled for no earlier than Aug. 27. Photo Credit: Lockheed Martin

The fourth in a Lockheed Martin-built, […]

NAVY's MUOS-3 Relocates for On-Orbit Operations as MUOS-4 Prepares for Late-Summer Launch

MUOS-4, the next satellite scheduled to join the U.S. Navy’s new MUOS secure communications network later this year, is in final assembly and test at Lockheed Martin’s satellite manufacturing facility in Sunnyvale, Calif. Photo Credit: Lockheed Martin

The third in a Lockheed Martin-built five-ship fleet for a next-generation, narrowband tactical military satellite communications system […]