Distance Measuring Equipment (DME) is seeing renewed interest for its ability to support future aviation navigation and surveillance needs. It is one of the primary technologies being examined by the Federal Aviation Administration (FAA) Alternative Positioning, Navigation and Timing (APNT) project to support needs to provide an alternative to global navigation satellite systems (GNSS) in the N...

Zhaoning ZHANG Professor Research Base of Air Traffic Management Civil Aviation University of China 100 Xunhai Road, .Dongli District, Tianjin 300300 China Fax: +86-22-2409-2454 E-mail: [email protected] Lili WANG Research Associate Air traffic Management College Civil Aviation University of China 100 Xunhai Road, .Dongli District, Tianjin 300300 China Fax: +86-22-2409-2454 E-mail: wll_nwpu@sin...

SBAS and GBAS enhance standalone GNSS navigation to meet the safety and availability requirements of civil aviation. SBAS and GBAS are also freely available to other users, such as automobiles, buses, and trains on land as well as ships near shore. However, integrity as implemented there are significant differences between the aviation interpretation of navigation integrity and the one that wou...

In February 1912, the Surgeon General of the United States Army prepared a special preliminary physical examination for candidates who were to receive instruction in the Aviation Section of the Signal Corps. This examination and those devised over the next four years were too demanding and few candidates could pass. In response to the need to revise medical standards for aviators, Colonel Theod...

This paper estimates reduced-form Phillips curves for Brazil with a framework of time series with unobserved components, in the spirit of Harvey (2011). However, we allow for expectations to play a key role using data from the Central Bank of Brazil’s Focus survey. Besides GDP, we also use industrial capacity utilization rate and IBC-Br index, as measures of economic activity. Our findings supp...

To improve accuracy and reliability, Boolean combination (BC) can efficiently integrate the responses of multiple biometric systems in the ROC space. However, BC techniques assume that recognition systems are conditionally-independent and that their ROC curves are convex. These assumptions are rarely valid in practice, where systems face complex environments, and are designed using limited enro...

The accident rate for general aviation remains high. While most general aviation accident studies have been pilot-focused, there is little research on the involvement of aircraft maintenance errors. We undertook a study to answer this question. The Microsoft Access database was queried for accidents occurring between 1989 and 2013 involving single engine piston airplanes operating under 14CFR P...