Sentence examples for ground observer from inspiring English sources

Soon after onset, auroral activity expands to fill the entire sky above a particular ground observer.

The U.S. Hellfire antitank missile, for example, used laser designation by an air or ground observer who could be situated many miles from the launching helicopter.

The ground-controlled approach (GCA), in which a ground observer monitors the course and descent angle of an aircraft via radar, enables pilots to land under extremely adverse weather conditions.

In the mid-1950s in Salisbury, Conn., he volunteered at age 15 to organize the ground observer corps, which watched for low-flying planes as part of civil defense efforts during the cold war.

The notion of nationwide observers might seem archaic, like the Ground Observer Corps watching for Soviet bombers in the 1950's, to generations that have grown used to satellite photography and snazzy television graphics and assume that the government collects everything electronically.

But because none of the pilotless aircraft intended for civilian use can yet comply with the FAA's "sense and avoid" rules, a ground observer or chase aircraft is required to keep the drone in sight at all times to act as its eyes.The FAA's rationale is that drones piloted remotely by operators on the ground cannot see other aircraft in the sky in the way airborne pilots can.

Until the second half of the 20th century, target acquisition a vital part of fire control was almost entirely visual, relying upon ground observers.

Using radar and information provided by ground observers, he carried out his navigational feats superbly, landing 24 minutes after he had taken off, with an average speed of 1,132 miles an hour for his runs.

The reason cited most often by firefighting experts is the requirement that the aircraft be followed and monitored by a chase plane if ground observers cannot see them through smoke, or because they are flying into canyons in steep and rugged terrain.

Low clouds or heavy fog in the Hokkaido area may have hidden the NLC from ground observers, even though NLCs are constantly transported to middle-latitude regions.

German artillery positions and the second line were not visible to British ground observers.