In 3 experiments, we examined maneuver choice, flight safety, and mental workload across 3-dimensional (3D) perspective and 2-dimensional coplanar cockpit displays of traffic information in a free-flight simulation. In Experiment 1 (30 pilots), we examined dimensionality issues; in Experiments 2 and 3 (18 pilots each), we examined the effects of traffic density, dimensionality, and vertical pro...

On the Norwegian coastline, sea temperatures are low throughout the year, and the personnel operating Sea King rescue helicopters are required to wear survival suits during over-sea flights. Paradoxically, this may lead to a situation where the pilots are subject to heat stress during flight (1). Thermal stress may result in fatigue and impaired pilot performance, which may raise the risk of pi...

A human-in-the-loop experiment was conducted at the NASA Ames and Langley Research Centers, investigating the En Route Free Maneuvering component of a future air traffic management concept termed Distributed Air/Ground Traffic Management (DAG-TM). NASA Langley test subject pilots used the Autonomous Operations Planner (AOP) airborne toolset to detect and resolve traffic conflicts, interacting w...

Abstract – We present a method for the joint estimation of timing and carrier-frequency offset in Orthogonal frequency-division multiplexing (OFDM) systems. We show that it is possible to generate these estimates without the use of pilots, by exploiting the cyclic prefix of OFDM frames. We derive the joint likelihood function of the offsetparameters given the received data. The performance of t...

Pilots of high-performance military aircraft rely on enormous amount of information from various instruments, visual display from computer and audio communication from outside references. Under high-stressed, visibility-impaired or distracting conditions, even experienced pilots may fail to perceive the information correctly. In particular, a loss of situational awareness such as spatial orient...

irrigation management transfer (imt) is under implementation within 63 countries over the world. the results and constraints of this event have been different in mentioned countries. this research objected to survey of imt constraints and identifies its key indicators in ghazvin and moghan pilots with different characteristics in type of irrigation and their imt process. the research method is ...

In this paper, the relationship between time and frequency domain joint channel estimation (JCE) in multi-branch, i.e., multi-user and/or multiple antenna, systems is explained. It is proved that the design criterion of optimum pilots for frequency domain JCE can be deduced from the design criterion of optimum pilots for time domain JCE, and vice versa. This uncovers that the optimum pilots in ...

During aviation accident investigations, vitreous fluid and urine samples from pilot fatalities are analyzed for glucose and blood for hemoglobin A(1c) (HbA(1c)) to monitor diabetic pilots and to discover other pilots with undiagnosed/unreported diabetes. The prevalence of elevated glucose concentrations in fatally injured pilots was evaluated by searching the Civil Aerospace Medical Institute'...

OBJECTIVE The aim of this study was to track the course of cerebral tissue oxygen saturation (rSO2) and pilot performance during an episode of gravity-induced loss of consciousness (GLOC). BACKGROUND GLOC, a major problem facing pilots of high-performance aircraft, is brought about by a sudden reduction in rSO2 as a result of increased +Gz force. It consists of 24 s of complete functional imp...