February 4, 2024 | International, C4ISR
BAE Systems buys drone-maker Malloy Aeronautics
The acquisition follows a two-year partnership between the companies to develop the all-electric quadcopter T-650.
May 1, 2019 | International, C4ISR
DARPA Tests Advanced Chemical Sensors
DARPA's SIGMA program, which began in 2014, has demonstrated a city-scale capability for detecting radiological and nuclear threats that is now being operationally deployed. DARPA is building off this work with the SIGMA+ initiative that is focused on providing city- to region-scale detection capabilities across the full chemical, biological, radiological, nuclear, and explosive threat space.
DARPA initiated a SIGMA+ pilot study last year known as ChemSIGMA to provide initial data and insights into how new chemical sensors using the existing SIGMA network would function. The chemical sensor package incorporates a chemical sensor, wind sensor and communications board into a weatherproof housing. Sensors report wind readings and real-time chemical information to a central cloud-hosted suite of fusion algorithms.
“The algorithms were developed using a custom simulation engine that fuses multiple detector inputs,” said Anne Fischer, program manager in DARPA's Defense Sciences Office. “We built the algorithms based on simulant releases in a large metropolitan area – so we took existing data to build the algorithms for this network framework. With this network, we're able to use just the chemical sensor outputs and wind measurements to look at chemical threat dynamics in real time, how those chemical threats evolve over time, and threat concentration as it might move throughout an area.”
In the pilot study, DARPA researchers from MIT Lincoln Laboratory, Physical Sciences Inc., and Two Six Labs, built a small network of chemical sensor packages. In partnership with the Indianapolis Metropolitan Police Department, Indianapolis Motor Speedway, and the Marion County Health Department, DARPA's performer teams deployed the network on-site at the Indianapolis Motor Speedway in late April 2018.
The chemical sensor network and the data collected during events such as the 2018 Indianapolis 500 were critical to the DARPA effort, allowing the team to assess the performance of the sensors and network algorithms. These tests were conducted in an urban environment to ensure that the system could handle complex and stochastic signals from species that are ever present in a city's chemical background. Significantly, the network-level algorithm successfully improved system performance by correctly suppressing false detection events at the individual detector level. The group of DARPA researchers was also able to collect a large relevant data set and valuable user feedback that will guide ongoing system development efforts.
Further testing with safe simulant/concert smoke at Indianapolis Motor Speedway, August 2018
During additional tests in August 2018, a non-hazardous chemical simulant was released in the empty Indianapolis Motor Speedway at a realistic threat rate. Concert fog was also released to serve as a visible tracer. The propagation of the visible tracer was observed in aerial photography, and ChemSIGMA sensors and algorithms determined the release location with unprecedented accuracy. The web-based ChemSIGMA interface allows the user to view alerts in real time across a variety of devices. Multiple trials were conducted over the course of several days assessing performance over a variety of meteorological conditions. Releases occurred during daytime and nighttime with a full range of wind directions and speeds. The ChemSIGMA prototype system detected all of the simulant releases and generated zero false alarms over the course of testing.
Department of Defense simulant testing at Dugway Proving Ground, Utah, October 2018
“We're looking at how we might make this network more robust and more mature,” Fischer said. “For example, we implemented a network at Dugway Proving Ground as part of a DoD test for simulant releases, and have shown that the network can respond to a number of chemical simulant threats different than those used in Indianapolis, as well as built-in capabilities for mobile releases. Over the past few months, the team has used these data sets to further refine the algorithms, and plans to integrate and test them with the ChemSIGMA system in test events scheduled later this year.”
The successful pilot and simulant test of the ChemSIGMA system at the Indy500 and Dugway Proving Ground provided valuable, relevant, and realistic data sets for validation and verification of the source localization and plume propagation algorithms.
DARPA is currently extending the capabilities for networked chemical detection by advancing additional sensor modalities, including short-range point sensors based on techniques, such as mass spectrometry, and long-range spectroscopic systems. As these systems are further developed and matured, they will be integrated into the SIGMA+ continuous, real-time, and scalable network architecture to increase the system's capabilities for city-scale monitoring of chemical and explosive threats and threat precursors.
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July 15, 2019 | International, Other Defence
Army to Receive 7.62mm Squad Marksman Rifles as Early as Next Year
By Matthew Cox Heckler & Koch Defense Inc. will soon begin delivering thousands of 7.62mm squad-designated marksman rifles to the Army to give infantry and other close-combat units a better chance of penetrating enemy body armor. H&K will deliver "between 5,000 and 6,000" variants of the G28 rifle, which the Army plans to issue as its new squad designated marksman rifle (SDMR), according to a July 12 H&K news release. Under the agreement, the rifles will be manufactured by H&K in Oberndorf, Germany, and will begin to arrive in the H&K-USA facility in Columbus, Georgia, early next year, according to the release. Once there, H&K-USA workers will install scopes and mounts purchased by the Army under a separate agreement. "This is a significant achievement for Heckler & Koch," H&K-USA's chief operating officer, Michael Holley, said in the release. "The HK SDMR system will add much-needed capabilities to virtually every squad in the Army. We are honored by this opportunity." The new SDMRs are part of an interim effort to make squads more lethal ahead of the Army's fielding of the Next-Generation Squad Weapon system sometime in 2022, service officials have said. In May 2017, Army Chief of Staff Gen. Mark Milley told Senate Armed Services Committee members that the service's current M855A1 Enhanced Performance Round will not defeat enemy body armor plates similar to the U.S. military-issue rifle plates such as the Enhanced Small Arms Protective Insert, or ESAPI. As a short-term fix, the Army selected the G28 as its M110A1 Compact Semi-Automatic Sniper System in 2016, to be used with the service's new 7.62mm enhanced performance round to give squads more penetrating power. In the past, the Army relied on the Enhanced Battle Rifle, or EBR, 14 -- a modernized M14 equipped with an adjustable aluminum stock with pistol grip, scope and bipod legs -- to fill the growing need by infantry squads operating in Afghanistan to engage enemy fighters at longer ranges. But the EBR is heavy, weighing just under 15 pounds unloaded. The M110A1 weighs about 11 pounds. In the long term, the Army is working with gunmakers to develop the new Next Generation Squad Weapon (NGSW) that is slated to fire a special, government-produced 6.8mm projectile that promises higher velocities at greater ranges, service officials say. The program is being designed to produce an automatic rifle version to replace the M249 squad automatic weapon and a carbine version to replace the M4 carbine. Army officials said recently that they expect to begin receiving prototypes of the NGSW in July and August and that the weapon could be fielded to units beginning in late fiscal 2020. https://www.military.com/daily-news/2019/07/12/army-receive-762mm-squad-marksman-rifles-early-next-year.html
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November 15, 2021 | International, Aerospace, Naval, Land, C4ISR, Security
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