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The purpose of this paper is to present a method to analyze the noise in aircraft cabins through the VHF Aeronautical Communication Channel, aimed at examining an environment that has the possibility of communication problems between the aircraft crew and the professionals responsible for the controls on land.

This analysis includes equipment normally used for identification and comparison of electromagnetic noise, the cabin and the environment that are present in an airport, as well as equipment for frequency analysis and intensity of those signals. The analysis is done in a reverse way, eliminating situations that are not common in the examined environment, until the identification of the situation with the irregularity.

According to the results, the implementation of the Fourier transform for noise analysis in the cabin was efficient. These results demonstrate that through this transformation, the noise sources can be identified in the environments in cases where there is much spectrum pollution.

This kind of noise analysis is important, considering the importance of having good accuracy in airport environment analysis.

The paper presents the main trends in the future of aviation communications, and describes the new applications that aim to minimize problems with the current VHF channel.

COMMUNICATION between aircraft and the ground, and between two or more aircraft, has always been the fundamental requirement of avionics. Once heavier‐than‐air machines had ceased to be a novelty, the development of reliable communication systems became essential, although it required the impetus of the 1914–18 War to produce a definite requirement.

THE operational role of the Harrier requires the installation of a comprehensive range of communications and radio navigation aid equipment. VHF/UHF equipment is required for airfield and enroute communications and for liaison with other aircraft. Tac/VHF equipment is required for liaison purposes with land vehicles, and forward command posts, while HF equipment is needed for long range air to ground, or ground to ground communications with rear command areas during cab rank operation. TACAN installation is required to provide short range navigation information derived from a ground station or airborne tanker aircraft, and this data can be used to supplement the Inertial Navigation and Attack System (INAS) moving map display or as a self contained aid. IFF equipment is needed for identification purposes.

The three channels we use for our thoughts – Visual, Hearing and Feeling (VHF) – are described, and witty suggestions are made to assist trainers in optimising the attention and retention abilities of trainees.

WHILST much is heard of the new era in air transportation heralded by the wide‐bodied or ‘Jumbo’ jets and the supersonic transport, a quit revolution istaking place in the provision of ground facilities, especially in the world of air traffic control.

Examines policy implications of over‐the‐air’s impending demise to cable and direct broadcast satellites in the USA. Looks at policy questions and the different types of broadcasters. In conclusion, says that TV has been going through a gradual but fundamental change, but stresses that on the other hand, radio is a wonderful means to reach many people simultaneously, although TV has only a visual modality, whereas radio is best for people on the move.

The last decade has seen increasing advocacy for, and interest in the use of white space in the broadcasting bands by providers of wireless broadband services. This paper aims to discuss the scope in Australia for “symbiotic” and “invasive” white space devices to operate in the UHF band after digital switchover and speculate about longer term trends.

The authors draw from their analysis of recent regulatory decisions to explain how the parameters established for channel planning naturally conduce to the development of large white spaces. They then identify emerging opportunities for white space usage in the reduced UHF band allocated to digital television services as well as in nearby guard bands.

The article's analysis suggests that there is considerable scope for white space devices to operate in Australia – even in the context of a reduced UHF band following analog switch off. Furthermore, the authors argue that the development of complementary business models could see off any perceived conflict between intensive white space usage and the long‐term benefit of both broadcasters and telecommunications operators.

It is timely for proponents of white space usage to establish regulatory arrangements that will allow intensive use of those white spaces. Current FCC proposals to base the regulatory framework on spectrum co‐sharing between broadcasters and white space broadband providers may lead to similar, yet distinct, opportunities in the USA as well.

There is a surprising paucity of published information worldwide regarding white space regulation. This article provides an in‐depth discussion of the main parameters driving white space opportunity.

A completely new, combined HF and VHF communications system has been developed by The Marconi Company, primarily for use in light aircraft and helicopters. This single system, type AD 1400, provides all the communications facilities which are necessary for a wide range of light aircraft.

APPLIED Technology, Middle East and European marketing and technical support representative of PF Industries Inc, will exhibit ground support equipment supplied to airlines worldwide.