Multibeam antenna to improve communication passes first Air Force trials

On the same subject

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  August 23, 2023 | International, Land

  US Army approves Sentinel A4 air defense radar for low-rate production

  The US Army's Sentinel A4 radar that can track challenging threat targets like cruise missiles is moving into low-rate initial production.

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  August 20, 2020 | International, Aerospace

  Missile Defense Agency director lays out hurdles in path to layered homeland missile defense

  By: Jen Judson WASHINGTON — The Missile Defense Agency is planning to develop a layered homeland intercontinental ballistic missile defense architecture, but it must clear a range of hurdles to get after an approach that addresses emerging threats and fills a gap while a next-generation interceptor is developed, according to the agency's director. The agency unveiled plans in its fiscal 2021 budget request in February to create a more layered homeland defense system that would include regional missile defense capability already resident with the Navy and Army to bolster homeland defense against ICBMs. The plan would include establishing layers of defensive capability relying on the Aegis Weapon System, particularly the SM-3 Block IIA missiles used in the system, and a possible Aegis Ashore system in Hawaii. The underlay would also include the Terminal High Altitude Area Defense (THAAD) system. The Army is already operating a THAAD battery in South Korea and Guam. The layered approach would buy time while the Pentagon scrambles to field a new interceptor to replace older ground-based interceptors — after canceling its effort to redesign the kill vehicle for the GBIs — in its Ground-based Midcourse Defense system located primarily at Fort Greely, Alaska. With little detail conveyed in MDA's budget request for a layered homeland missile defense plan, Congress is pressuring the agency to come up with a strategy and approach to putting the architecture in place in both the House and Senate passed FY21 defense authorization bills. Much is riding on the success of an upcoming test of the SM-3 Block IIA missile, Vice Adm. Jon Hill said during a Heritage Foundation virtual event on Aug. 18. The missile has seen several test failures in the recent past. “We're going to really stress the SM-3 Block IIA outside its design space,” Hill said. “It was designed for medium and intermediate range. Now we're going against long-range intercontinental ballistic missiles. The analysis says we'll be successful, but nothing is real to any of us until we actually get the empirical data from being out in the flight range.” The test will involve several time zones on several different ranges and the same ICBM target used in the most recent GMD test, Hill said. And while the test is still on track to happen by the end of the year, Hill said, challenges in coordination and travel due to the coronavirus pandemic could possibly have an impact on schedule. When the pandemic hit, “we were ready and postured to go to the Pacific to execute” Flight Test Maritime-44, Hill said, “so we did get the target on station. So the target's out there in the Pacific and it's ready to roll.” Following FTM-44, the agency would like to execute another test against a very complex ICBM target unlike the “simple” one being used in the upcoming test. That target will have “a lot of separation debris and that has a lot of countermeasures,” Hill said. “We want to make sure that the system in total, from the space assets to the radar to the engage-on-remote capability that passes that information to the ship, that ship can actually sift through all that and say, ‘That's the [reentry vehicle] and that's the where the missile's going to go,‘” he added. Success in the upcoming test doesn't mean the agency's work is done, Hill said. Upgrades will be required based on threats, combat system certifications will need to be conducted and work with the Navy to determine where Aegis ships would deploy will have to occur. The agency will also have to determine how quickly it can ramp up its production line for SM-3 Block IIA missiles. Then “if we succeed with Aegis, then we'll go right down the path with THAAD,” Hill said. The second big challenge, after ensuring all the parts work to provide layered coverage, is developing engagement coordination between the different layers, according to Hill. “Let's just say that step one is a ship off the coast as a complement to GMD. Those systems today talk already, but they're not talking in terms of being layered defenders,” Hill said. “So if GMD, for example, decides he's going to wait this first shot out and let the ship take it, we have to have the communication network to go do that. We have to have the technical architecture with the Command and Control Battle Management system, but in that context of layered defense and engagement coordination.” Aegis ships are already able to do engagement coordination among each other and the work the Pentagon is doing to get THAAD and the Patriot air-and-missile defense system to coordinate are “extensible to that problem,” Hill said, “but we still need to do that kind of engineering and that sort of architecture work.” And while a layered missile defense architecture for the homeland is an intricate one, “you don't have to solve the whole problem” at once, Rebecca Heinrichs, a missile defense analyst at the Hudson Institute, said during the Heritage Foundation event. But she cautioned that she did foresee challenges in establishing such an architecture on the political front rather than on the technical side. “Congress always wants to vet these kinds of things, so even though it is Congress that wanted the SM-3 Block IIA test, whenever you start talking about which district it is going to be in, where it's going to go and that kind of thing, that is a political challenge that takes a lot of debate and conversation.” https://www.defensenews.com/digital-show-dailies/2020/08/18/missile-defense-agency-director-lays-out-hurdles-in-path-to-layered-homeland-missile-defense/

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  August 22, 2018 | International, Aerospace, C4ISR

  Air Force’s next GPS satellite ready to boost accuracy, anti-jamming capabilities

  By: Daniel Cebul Lockheed's Martin second GPS III satellite has passed all of the U.S. Air Force's technical and safety tests and is ready to be launched, likely in 2019, according to a company statement Aug. 21. The statement marks the formal designation that the satellite is “available for launch.” The first GPS III satellite was available for launch in September 2017 aboard a SpaceX Falcon 9 rocket and is set to liftoff from Cape Canaveral Air Force Station in Florida before the end of 2018. The next satellite will launch aboard a rocket from United Launch Alliance. The new satellite constellation is expected to be a significant improvement over the current generation of satellites. According to Harris Corp., the company that provides Lockheed Martin with the satellites navigation payload, the next-gen satellites are equipped with “a Mission Data Unit (MDU) with a unique 70 percent digital design that links atomic clocks, radiation-hardened computers and powerful transmitters." This allows for signals three times more accurate than those on current GPS satellites, the company said. In addition to being more accurate, the satellite is also eight times more resistant to jamming. This model also adds and maintains signals to ensure compatibility with Global Navigation Satellite Systems and provide stronger signal integrity. Harris also unveiled an upgraded payload in November 2017 to be used for the Air Force's GPS III Follow On (GPS IIIF) program, which will begin with the 11th GPS III satellite. This next-gen payload will grant the clock signal for a new GPS III Search and Rescue (SAR) payload, and extend the satellite's service life. Lockheed Martin is expected to be the prime contractor. In June, the third GPS III satellite completed thermal vacuum and environmental testing to simulate how the satellite will hold up in the space's unforgiving environment. https://www.c4isrnet.com/c2-comms/satellites/2018/08/21/air-forces-next-gps-satellite-ready-to-boost-accuracy-anti-jamming-capabilities