He was responsible for the development of air-to-ground communications systems.

In addition to refueling, the exercise will involve testing air-to-ground communications.

Air-to-ground communications have a variety of advantages over air-to-space connections.

On April 13, the biplane demonstrated wireless air-to-ground communications at College Park.

The Soviets had introduced air-to-ground communications, radar, a proper maintenance system, and depots for forward fuel reserves.

These aircraft represent the pinnacle of Air-to-Ground communications.

Despite nearly a century of innovation in air-to-ground communications, many of the original techniques used to communicate with the ground are used by today's aircraft.

He forecast the replacement of the horse by the airplane in reconnaissance, and wireless air-to-ground communications that included the transmission of photographs.

In contrast, on Sept. 11, it was evident from cellphone conversations and other air-to-ground communications that hijackers had commandeered the aircraft before they crashed.

The demand for artillery fire adjustments through aerial observation was constant in spite of difficulties encountered in air-to-ground communications.

Constant air-to-ground communications are maintained as the shuttle makes a giant loop around to the top of the station and, slowly attaches to the docking port.

A tape of air-to-ground communications would have clarified the situation but it was mistakenly erased after the airline's standard 31-day holding period, Mr. Hotard said.

And no one is eager to penalize GTE for its innovation in air-to-ground communications, or disrupt Airfone service to consumers.

Air-to-ground communications and the beat-by-beat commentary from the NASA spokesman in Houston were barely audible.

Frequencies also used for air-to-ground communications for military close air support requirements as well as some other tactical air-ground and air-air communications.

While other airlines offer in-flight calling on flights over most parts of the domestic United States, using air-to-ground communications, Skyphone relies on satellite communications.

Federal regulatory authorities have recently been sending signals that they are studying relaxing bans on in-flight use of wireless air-to-ground communications devices, perhaps before the end of 2006.

He was a pioneer in the development of radio navigational aids (NAVAIDs) used by pilots for location and navigation as well as air-to-ground communications.

The electronic equipment to be installed was listed as the FuG X, 16, 25 Peil G V air-to-ground communications and blind landing devices.

Airborne phones use two separate, narrow bandwidths, she said, between 849 and 851 megahertz for air-to-ground communications, and between 894 and 896 megahertz for receiving calls.

The Soviets eventually shifted the frequencies they used, without admitting they were even the source, largely due to its interference with certain long-range air-to-ground communications used by commercial airliners.

Seldom has largely inexplicable pilot error seemed to figure so prominently in the cause, whatever other contributions may have been made by gaps in radar, confusion in air-to-ground communications or routine technical aberrations.

Though the company is searching for more customers, the reason clients have been willing to pay the price for a Megadata system can be traced to the tight F.A.A. strictures on air-to-ground communications.

People involved in air traffic control said the F.B.I. seized the air traffic tapes of the conversations with that airplane, and no transcript was made available of air-to-ground communications for the flight.

As part of his unit's work-up for operations, McLachlan organised training exercises with the 6th Division, as well as written exams to test his men's knowledge of army jargon and air-to-ground communications.