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The Defense Advanced Research Project Agency will begin testing a program to launch and recover small drones from an Air Force C-130 aircraft. DARPA’s Gremlins program deploys a group of small drones carrying a 60-pound sensor payload up to 300 nautical miles.
The drones are able to perform a range of missions, such as testing enemy air defenses and conducting ISR missions for an hour on station before returning to an Air Force C-130, developers said. A key concept of the program is extending the mission range of aircraft, while allowing manned crews to operate at safer distances.
Gremlins moves beyond existing state-of-the-art programs able which are able to launch, but not recover, swarms of mini-drones. The Pentagon’s Strategic Capabilities Office, an initiative aimed at harnessing near-term emerging technologies for operational use, demonstrated an ability to launch small drones from the flare dispenser of an F-16. While able to blanket areas with ISR and perform significant mission-enhancing functions, they are expendable and not available for re-use.
“For decades, U.S. military air operations have relied on increasingly capable multi-function manned aircraft to execute critical combat and non-combat missions. Adversaries’ abilities to detect and engage those aircraft from longer ranges have improved over time as well,” said DARPA in a statement.
DARPA has continued its contract with General Atomics Aeronautical Systems to move Gremlins into the next phase of development, an effort which will involve initial testing and evaluations along with a Preliminary Design Review.
“سیستم ما قادر است ساختارهای طولانی و کثیفی که زیست توده ها را می سازند، به گاز هیدروژن تبدیل کند؛ چیزی که خیلی مفیدتر از مواد اولیه است. با این سیستم می توانیم مواد ارگانیک را در معرض نور خورشید قرار دهیم و به راحتی سوخت هیدروژن تولید کنیم”. یافته های این تحقیق در نشریه انرژی طبیعت (Nature Energy) منتشر شده اند.
LRAD Corporation Announces Over $1.0 Million in International AHD & Mass Notification Orders
The orders include acoustic hailing devices ("AHDs") for law enforcement, defense and public safety applications in China, and follow-on LRAD 1000Xi systems for a maritime application in Japan. The orders also include LRAD 360X mass notification systems for upgrading tsunami early warning systems in Japan with LRAD's highly intelligible voice capability.
"Defense and law enforcement agencies throughout the world are equipping their personnel, vehicles and vessels with LRAD long range communication systems," commented Richard S. Danforth, Chief Executive Officer of LRAD Corporation. "Our AHD and advanced mass notification solutions provide our customers with proven and reliable systems to clearly communicate to the public and safely resolve uncertain situations."
A crossed-loop/monopole direction finding antenna for use with Watson Watt method, with a large diameter of 2 m to achieve a high sensitivity. The loops make use of patented cross-polarisation cancelling technology that eliminates disturbances due to cross-polarisation from on-horizon sources. This offers enhanced, reliable accuracy in real-world applications and field trials over traditional crossed-loop designs.
The antenna is collapsible for transport and storage. It is made of aluminium and brass elements and coaxial cable, with aluminium and composite mechanical parts. A lightweight composite quad pod supports the antenna above the ground. The quad pod collapses to a similar size to the antenna.
The required matching, beam-forming and calibration injection circuitry is housed in the base of the antenna.
A complete kit of parts including antenna, Quad pod, RF cables on drums, anchor stakes and alignment sight, is supplied with each antenna. The complete antenna and all accessories fit into the supplied shipping box.