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Avionics Heat Up, in a Good Way

As was apparent at Farnborough, if there is a single technology theme that today dominates how aircraft are designed, built, and operated, it is the transformational progress being made in aerospace avionics, and the human-machine interface. by Richard Gardner The common feature shared by recent aviation platforms is the high level of systems integration, and the way in which information is displayed or made accessible, allowing previously unimaginable levels of situational awareness to be available to pilots and ground controllers. This has greatly eased the pilot workload and enhanced flight safety, especially when flying in poor weather or operating in unfamiliar or hazardous terrain.

Posted in: Aerospace, Defense, Articles, DTB

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Airborne Antenna Considerations for C-Band Telemetry Systems

It is fairly well known within the aerospace community that telemetry is moving from the traditional L-band and S-band frequency ranges up to C-band. It is widely understood that the reason for this push to C-band is two-fold. First, traditional L and S frequency bands have been greatly reduced through reallocation for a variety of reasons by different markets, and second, the bandwidth required for most applications has seen exponential growth. This has not only been seen in military applications, but in civilian aerospace platforms as well.

Posted in: Aerospace, Defense, Articles, DTB

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Software-Designed System Improves Wireless Test Speed and Coverage

As wireless standards become more complex, the number of operational modes for these devices increases exponentially. As progression continues to the latest WiFi standard, new modulation schemes, more channels, more bandwidth settings, and additional spatial streams are added. Additionally, characterizing WLAN transceivers is especially challenging when faced with thousands of independent operational gain settings.

Posted in: Aerospace, Defense, Application Briefs, DTB

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Developing and Validating Statistical Cyber Defenses

The development and validation of advanced cyber security technology frequently relies on data that captures normal and suspicious activities at various system layers. Air Force Research Laboratory, Rome, New York Enterprise business processes are more connected than ever before, driven by the ability to share the right information with the right partners at the right time. While this interconnectedness and situational awareness is crucial to success, it also opens the possibility for misuse of the same capabilities by sophisticated adversaries to spread attacks and corrupt critical, sensitive information. This is particularly true for an insider threat scenario in which adversaries have legitimate access to some resources and unauthorized access to other resources that is not directly controlled by a fine-grained policy.

Posted in: Information Sciences, Electronics & Computers, Aerospace, Defense, Briefs

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Next-Generation Spectrometers for Rapid Analysis of Complex Mixtures

Spectrometers in chemical sensors are used in environmental and air quality monitoring, detection of hazardous gases and chemical warfare agents, and breath analysis in medical applications. Office of Naval Research, Arlington, Virginia Molecules have internal motions that are characteristic of their structure and identity. These motions can be studied by spectroscopy in different regions of the electromagnetic spectrum. Molecular spectra can be used as a “fingerprint” to unambiguously state whether or not a particular chemical is present and in what amount. As such, small portable spectrometers are frequently used as components of chemical sensors.

Posted in: Physical Sciences, Aerospace, Defense, Briefs

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Wireless Vital Signs Monitor for Trauma Patients

This monitor enables users to triage, prioritize transport, and track changes in numerous casualties from a remote location. Army Medical Research and Materiel Command, Fort Detrick, Maryland A miniature, portable wireless vital signs monitor (MWVSM), called Mini-medic™, could aid in the triage and diagnosis of trauma patients with and without traumatic brain injury (TBI). The MWVSM consists of two components, both of which are the approximate size and weight of a cellphone: one is a sensor that is placed either on the forehead or the fingertip of a patient, and the other is a monitor that receives a wireless signal transmitted up to 100 m carried by the medic.

Posted in: Medical, Aerospace, Defense, Briefs

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Analysis of an In-Ear Dosimeter for a Single Hearing Protection Device

This data could help prevent permanent hearing loss in military personnel working in extreme noise environments such as those generated by jet aircraft. Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio US national and many international hearing conservation programs (HCPs) have adopted a noise exposure criterion of 85 dBA for a time-weighted average of 8 hours, with a 3 dB per doubling exchange rate (safe exposure duration was cut in half for each 3 dB increase in noise level). Military personnel who work in extreme noise environments require high attenuation from hearing protection in order to complete a normal duty day without risk of permanent hearing loss. Improvements to both hearing protection and noise dose monitoring have been consistently recommended and pursued as a means to reduce risk for noise-induced hearing loss.

Posted in: Physical Sciences, Aerospace, Defense, Briefs

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