EU-Canada joint ministerial committee meeting

On the same subject

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  May 24, 2023 | International, C4ISR

  Northrop missile-warning satellites pass early design review

  The Space Force plans to award a production contract in mid-2024 and the company is on track to launch the first satellite in 2028.

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  August 29, 2018 | International, C4ISR

  Is this the new wave of submerged communications?

  By: Kelsey Atherton The ocean hides what it contains, and it is in that hiding that submarines have their power. Lurking under seas, at first with just enough capability for an attack run and now with the ability to lurk for months at a time, submarines remain power out of reach, unseen until engaged in combat or resupplying in a friendly port. That stealth comes at a cost, however, besides the simple perils of existing underwater. When submerged, submarines are more or less on their own until they resurface again, since radio waves do not travel well through seawater. Or they are for now. New research by MIT, presented at a conference in late August, devised a way for submerged submarines to communicate wirelessly with people on the surface by combining hydroacoustics and acoustic radars. Presently, submarines communicate either across normal radio frequencies when surfaced or through hydroacoustic signals and listening posts underwater that can transmit the messages back to counterparts on shore. Very and extremely low-frequency radio waves can be transmitted in a way that submarines can listen to below the surface, but it's a one-way form of communication, from stations on land to submarines. To get something responsive, with the flexibility to communicate away from static seabed hydrophones, needs something else. Specifically, it needs a way to combine hydroacoustic transmission from the submarine through water that can then be converted into a useful data. “We present a new communication technology, translational acoustic-RF communication (TARF),” write paper authors Francesco Tonolini and Fadel Adib of the MIT Media Lab. “TARF enables underwater nodes to directly communicate with airborne nodes by transmitting standard acoustic signals. TARF exploits the fact that underwater acoustic signals travel as pressure waves, and that these waves cause displacements of the water surface when they impinge on the water-air boundary. To decode the transmitted signals, TARF leverages an airborne radar which measures and decodes these surface displacements.” In testing, they demonstrated that the communication technique can transfer data at standard underwater bitrates up to 400bps, and even do so with surface waves 6.3 inches crest-to-crest, or 100,000 times larger than the surface perturbations made by the acoustic transmitter. Right now, this communication is one-way. While the signal transmitted up from the water produces useful information at the boundary with the air, a signal transmitted through the air downwards would disintegrate on integration with water. This one-way is distinct from previous forms of communication with submarines, however, as it lets the submarine talk without revealing its position to surface sensors. Despite the limitations, and the earlierness of the research, Tonolini and Adlib see a bright future for the technology, as a way to enable a host of new technology in machines. The technology, they write, can enable “many applications including submarine-to-drone communication, deep-sea exploration, and subsea IoT (Internet of Things). https://www.c4isrnet.com/c2-comms/2018/08/28/mit-discovers-way-for-submarines-to-talk-to-drones

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  April 1, 2020 | International, Land

  Oshkosh wins contract to modernize US Army’s heavy tactical vehicles

  By: Jen Judson WASHINGTON — Oshkosh Defense has won a $346 million award to modernize the U.S. Army's fleet of heavy tactical vehicles, according to a March 30 company statement. The company will recapitalize Heavy Expanded Mobility Tactical Trucks (HEMTT) and Palletized Load System (PLS) trucks with updated technology and safety features. Under the contract, Oshkosh will also build new PLS trailers. Upgrading heavy tactical trucks aligns with the service's need to support operations across multiple domains against near-peer adversaries. “Whether they're hauling rocket launchers and missile defense systems, or transporting mission-critical equipment, the HEMTT and the PLS will continue to be an integral part of the U.S. Army and U.S. Army Reserve heavy vehicle fleets for years to come,” said Pat Williams, the company's vice president and general manager of U.S. Army and Marine Corps programs. “As the military pivots its focus to near-peer adversaries, they can be confident that the [family of heavy tactical vehicles] fleet will continue to serve as a key enabler for combat missions.” Oshkosh has already recapitalized more than 13,700 HEMTTs and 3,400 PLS for the U.S. military since 1995. The company supplies tactical vehicles across the services, including heavy, medium and light. Oshkosh has long held lucrative contracts to supply the services and foreign partners with medium tactical vehicles; it had won a contract to provide a new variant of the vehicle but has yet to begin delivering to the Army. Navistar Defense recently sued the Army over its continued purchase of Oshkosh's family of tactical vehicles without competition, but the U.S. Court of Federal Claims ruled in favor of the service and Oshkosh. Oshkosh also provides the Joint Light Tactical Vehicle to the Army, Marine Corps and Air Force. The vehicle reached full operational capability last year after overcoming some design issues. The future is unclear for the Oshkosh-manufactured JLTV as the Army looks to compete for future lots of the vehicle, according to the service's fiscal 2021 five-year budget plan. https://www.defensenews.com/land/2020/03/31/oshkosh-wins-contract-to-modernize-armys-heavy-tactical-vehicles/