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  22 juillet 2024 | International, Aérospatial

  US Air Force, Boeing reach deal on prototype E-7

  The Air Force's desired upgrades to Boeing's battle management plane proved more complicated and costly than expected, snarling negotiations for months.

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  12 août 2019 | International, C4ISR

  Extending Field of View in Advanced Imaging Systems

  New program focuses on developing curved infrared focal plane arrays to improve optical performance and widen field of view while reducing system size of military imagers The military relies on advanced imaging systems for a number of critical capabilities and applications – from Intelligence, Surveillance, and Reconnaissance (ISR) and situational awareness to weapon sights. These powerful systems enable defense users to capture and analyze visual data, providing key insights both on and off the battlefield. Today, nearly all imaging systems rely on detector arrays fabricated using planar processes developed for electronic integrated circuits on flat silicon. While significant progress has been made in advancing these technologies for narrow field of view (FOV) systems, optical aberrations can limit the performance at the periphery in wide FOV systems that then require large, costly, and complex optics to correct. The trade-off for correcting optical aberrations by using large, heavy lenses is a reduction in optical signal and a large size penalty, which limits their use for new and emerging capabilities. “Tremendous progress has been made over the past 20 years towards making multi-megapixel infrared (IR) focal plane arrays (FPA) for imaging systems cost effective and available to the Department of Defense,” said Dr. Whitney Mason, a program manager in DARPA's Microsystems Technology Office (MTO). “However, limitations to the technology's performance and size remain. Current advances on the commercial side have shown the viability of small area, curved FPAs (CFPAs) for visible cameras. While these technologies have shown modest benefits, more must be done to achieve the performance and size requirements needed for imaging systems used in emerging defense applications.” DARPA developed the FOcal arrays for Curved Infrared Imagers (FOCII) program to expand upon the current commercial trend for visible sensor arrays by extending the capability to both large and medium format midwave (MWIR) and/or longwave (LWIR) infrared detectors. The program seeks to develop and demonstrate technologies for curving existing state-of-the-art large format, high performance IR FPAs to a small radius of curvature (ROC) to maximize performance, as well as curve smaller format FPAs to an extreme ROC to enable the smallest form factors possible while maintaining exquisite performance. FOCII will address this challenge through two approaches to fabricating a curved FPA. The first involves curving existing state-of-the-art FPAs, while keeping the underlying design intact. The focus of the research will be on achieving significant performance improvements over existing, flat FPAs, with a target radius of curvature of 70mm. The fundamental challenge researchers will work to address within this approach is to mitigate the mechanical strain created by curving the FPGA, particularly in silicon, which is very brittle. The second approach will focus on achieving an extreme ROC of 12.5 mm to enable a transformative reduction in the size and weight compared to current imagers. Unlike the first approach, researchers will explore possible modifications to the underlying design, including physical modifications to the silicon that could relieve or eliminate stress on the material and allow for creating the desired curvature in a smaller sized FPA. This approach will also require new methods to counter the effects of any modifications during image reconstruction in the underlying read-out integrated circuit (ROIC) algorithm. The FOCII program is hosting a proposers' day on August 13, 2019 at the Executive Conference Center, 4075 Wilson Blvd., Suite 300, Arlington, Virginia, 22203 from 9:00 a.m. to 4:00 p.m. EDT. The purpose of this meeting is to provide information on the FOCII program, promote additional discussion on this topic, address questions from potential proposers, and provide an opportunity for potential proposers to share their capabilities and ideas for teaming arrangements. The Special Notice for can be found here, https://www.fbo.gov/index.php?s=opportunity&mode=form&id=4c8a360d1f5be2e1b7e784f86b7d42fb&tab=core&_cview=0 Full details are available in the FOCII Broad Agency Announcement on FBO.gov: https://go.usa.gov/xV3EH. https://www.darpa.mil/news-events/2019-08-09

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  24 avril 2020 | International, Aérospatial

  America’s bomber force is facing a crisis

  By: Maj. Gen. Larry Stutzriem (ret.) and Douglas Birkey The nation faces a bomber crisis, and it is time to openly acknowledge the scale and scope of the problem. Tasked with deterrence and, if necessary, striking targets around the globe, Air Force crews operating these aircraft afford the nation's security leaders unique options best embodied in the phrase: anytime, anyplace. Despite the criticality of this mission, the Air Force currently operates the smallest, oldest fleet of bombers since its 1947 founding. No other service or ally has this capability, which places an imperative on this finite force. The service's recent announcement that it will be ending its continuous bomber presence in Guam further amplifies the precarious state of bombers. It is a stark warning to senior leaders in the Pentagon, in the executive branch and on Capitol Hill that the Air Force is “out of Schlitz” when it comes to the critical missions they perform. Bombers are unique instruments of power. They can strike targets with large volumes of kinetic firepower without requiring access to foreign bases and without projecting the vulnerability associated with regionally based land or sea forces. The striking power of a single bomber is immense. In fact, B-1Bs flying missions against ISIS in the opening days of Operation Inherent Resolve were able to carry more munitions than that delivered by an entire carrier air wing. Stealth bombers can penetrate enemy air defenses, depriving mobile targets of sanctuary. They can also carry large bunker-buster munitions required to eliminate deeply buried and hardened facilities. Bomber aircraft are also cheaper to operate on a per-mission basis when compared to alternate options, like ships, large packages of smaller strike aircraft or standoff missiles. The erosion of the bomber force is no secret. At the end of the Cold War, the U.S. Air Force possessed 400 bombers arrayed to fight the Soviet Union. Today, it has just 157, with a plan to cut a further 17 in the fiscal 2021 budget submission. Air Force efforts to modernize the bomber force a decade ago were thwarted within the Department of Defense by an excessive near-term focus on counterinsurgency operations. Bombers are requested by combatant commands on a continual basis given the concurrent threats posed by peer adversaries, mid-tier nations like Iran and North Korea, and hostile nonstate actors. The Air Force knows this mission area is stretched too thin, and that is precisely why in 2018 leaders called for an additional five bomber squadrons in “The Air Force We Need” force structure assessment. Well-understood risk exists with operating a high-demand, low-density inventory for too long. The B-1B force, which makes up over one-third of America's bomber capacity, offers a highly cautionary tale in this regard. In the immediate aftermath of 9/11, the service retired 26 of these aircraft to free up modernization funds, which subsequently were snatched away from the bomber mission area for other uses. For the next two decades, the Air Force flew the B-1B in a nearly continuous string of intense combat deployments. Sustainment funding was under-resourced, which further wore down the B-1B force. Last summer, B-1B readiness rates plummeted below 10 percent — effectively putting them out of commission. As Air Force Global Strike Command Commander Gen. Tim Ray explained: “We overextended the B-1Bs.” It was a toxic formula of too much mission demand and too few airplanes. Air Force leaders continually signaled concern, but their calls for help went unanswered. The normal solution to this sort of a challenge would be straight-forward: Go buy more airplanes. However, operational B-21s will not be in production until the latter 2020s. The Air Force is asking to retire 17 B-1s to free up resources to nurse the remaining aircraft along as a stopgap measure. COVID-19 emergency spending and corresponding downward pressure on future defense spending are only going to aggravate the complexity of this juggling act with mission demand, available force structure and readiness. Whether world events will align with these circumstances is yet to be seen. It was in this context that the Air Force decided to end its continuous bomber presence on Guam. Launched in 2004 to deter adversaries like China and North Korea and to reassure regional allies, the mission has been a tremendous success. It clearly communicated U.S. readiness to act decisively when U.S. and allied interests were challenged. Ending continuous bomber presence in the Pacific now sends the opposite message, just as the region grows more dangerous. This is a decision with significant risk, yet it is an outcome compelled by past choices resulting in a bomber force on the edge. The path forward begins with admitting the nation has a bomber shortfall. Retiring more aircraft exacerbates the problem. Nor is this just an Air Force problem. Bombers are national assets essential to our security strategy and must be prioritized accordingly. If other services have excess funds to invest in ideas like a 1,000-mile-range cannon when thousands of strike aircraft, various munitions and remotely piloted aircraft can fill the exact same mission requirements, it is time for a roles and missions review to direct funding toward the most effective, efficient options. Bombers would compete well in such an assessment. Ultimately, the solution demands doubling down on the B-21 program. There comes a point where you cannot do more with less. Given the importance of bombers to the nation, rebuilding the bomber force is not an option — it is an imperative. Retired U.S. Air Force Maj. Gen. Larry Stutzriem served as a fighter pilot and held various command positions. He concluded his service as the director of plans, policy and strategy at North American Aerospace Defense Command and U.S. Northern Command. He is currently the director of studies at the Mitchell Institute for Aerospace Studies, where Douglas Birkey is the executive director. Birkey researches issues relating to the future of aerospace and national security, and he previously served as the Air Force Association's director of government relations. https://www.defensenews.com/opinion/commentary/2020/04/23/americas-bomber-force-is-facing-a-crisis/