Aircraft location monitoring systems have advanced greatly in the past several decades. Such systems are essential to guarantee safe passage of aircraft through the skies, especially in the vicinity of busy airports. One of the newest aircraft location monitoring systems is called ADS-B. The ADS-B system is unique in that an aircraft uses Global Positioning System (GPS) to fix its own position, and then broadcasts its vital information (speed, heading, altitude, position coordinates, etc.). The information may be picked up by a ground-based receiver or another airborne system that is tuned to receive it. The ADS-B system is currently used by most commercial aircraft, and the US Federal Aviation Administration (FAA) will require the use of ADS-B systems in certain areas by
The use of nearfield acoustic holography (NAH) for locating and sizing leaks in building envelops has been previously presented [J. Acoust. Soc. Am. 137, 2233 (2015); J. Acoust. Soc. Am. 137, 2325 (2015), and J. Acoust. Soc. Am. 136, 2172 (2014)]. Standard NAH algorithms are fairly limited in the distance from the sources at which reconstruction can be made. In this paper, the authors present new research that shows that with judicious choices of matrix regularization, the distance from source to NAH measurement can be greatly increased making use of NAH for estimating building leakage much more practical. The application several different NAH matrix regularization methods are compared.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.