Saab to provide semi-autonomous Double Eagle undersea system to Kuwait

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  3 décembre 2019 | International, Naval

  Navy awards $732M contract for satellite ground systems

  By: Nathan Strout General Dynamics will provide sustainment services for the ground system for the Navy's narrowband satellite communication systems over the next decade, the company announced Nov. 27. The sole-source $732 million contract was awarded Nov. 8 and work expected to be completed by Nov. 2029. The Mobile User Objective System is the Navy's next generation narrowband satellite communications system, providing secure voice, video and data communications to military users all over the globe. MUOS was built to replace the Ultra High Frequency constellation, although the new system will support the legacy system for now. According to General Dynamics, just one MUOS satellite can provide four times the capacity of the entire legacy system. The MUOS ground segment is made up of four ground station facilities located around the world. According to the General Dynamics web site, each ground station has three free-standing antennas to receive radio call relayed through the MUOS satellites. Lockheed Martin is the prime contractor for the MUOS satellites, while General Dynamics was selected to build the ground system. “MUOS will provide our warfighters with the ability to communicate securely, anywhere, anytime, with voice clarity and data transmission speed similar to using a civilian cellphone,” said Manny Mora, vice president and general manager for General Dynamics' space and intelligence systems. “This capability delivers a whole new level of connectivity for troops in the field." On Oct. 16, the Navy announced that MUOS was deemed operationally effective following its months-long multiservice operational test and evaluation over the summer. With that designation, the new system is ready to be used in unrestricted operation. https://www.c4isrnet.com/battlefield-tech/c2-comms/2019/12/02/navy-awards-732m-contract-for-satellite-ground-systems

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  16 mars 2020 | International, Aérospatial

  Japan unveils its hypersonic weapons plans

  By: Mike Yeo MELBOURNE, Australia — Japan has outlined its research and development road map for its homegrown, standoff hypersonic weapons, confirming that it is seeking an incremental growth in capability and providing more details about the kinds of threats it is targeting with this new class of weapon. In a Japanese-language document published on the Acquisition, Technology and Logistics Agency website, the government said two classes of standoff hypersonic systems will be deployed — the Hypersonic Cruise Missile (HCM) and the Hyper Velocity Gliding Projectile (HVGP). The former will be powered by a scramjet engine and appears similar to a typical missile, albeit one that cruises at a much higher speed while capable of traveling at long ranges. The HVGP, on the other hand, will feature a solid-fuel rocket engine that will boost its warhead payload to a high altitude before separation, where it will then glide to its target using its altitude to maintain high velocity until impact. The agency also provided more details regarding warhead payloads, with different warheads planned for both seaborne and land targets. The former will be an armor-piercing warhead designed specifically for penetrating “the deck of the [aircraft] carrier,” while a land-attack version will utilize a high-density, explosively formed projectile, or EFP, for area suppression. Area suppression effects for the latter will be achieved via the use of multiple EFPs, which are more commonly known as a shaped charge. An EFP is made up of a concave metal hemispherical or cone-shaped liner backed by a high explosive, all in a steel or aluminum casing. When the high explosive is detonated, the metal liner is compressed and squeezed forward, forming a jet whose tip may travel as fast as 6 miles per second. Japan's road map also revealed the country is taking an incremental approach with regard to designing the shapes of warheads and developing solid-fuel engine technology, with plans to field early versions of both in the 2024 to 2028 time frame. They are expected to enter service in the early 2030s. The agency expects both systems to navigate via satellite navigation with an inertial navigation system as backup. Japan is seeking to establish a network of seven satellites to enable continuous positioning for its self-defense forces, which will enable it to provide continuous navigation data without relying on foreign satellites. Warhead guidance is achieved via either radio-frequency imaging converted from doppler shift data — which the government agency said will be able to identify stealthy naval targets in all weather conditions — or an infrared seeker capable to discriminating specific targets. Japan has been conducting R&D into various areas related to hypersonic weapons for a number of years, although most of it was to benefit other fields like satellite navigation and solid-fuel rockets. More work remains, however, in areas like hypersonic guidance systems, warhead and missile-body thermal shielding, and hypersonic propulsion systems in order for Japan to be able to field a viable standoff hypersonic weapons capability. https://www.defensenews.com/industry/techwatch/2020/03/13/japan-unveils-its-hypersonic-weapons-plans/

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  3 novembre 2021 | International, Aérospatial

  La marine américaine précise ses attentes sur le successeur du F/A-18 Super Hornet

  Contrairement à l'US Air Force, le F-35 n'a pas vocation à constituer l'épine dorsale de l'aviation embarquée de l'US Navy étant donné que celle-ci n'en a commandé 273 exemplaires auprès de Lockheed-Martin. Aussi, elle s'appuie essentiellement sur le F/A-18 Super H