NEETS 18.txt

Electromagnetic energy travels through air at approximately the speed of light, which is __________ STATUTE MILES per second.

186,000

186,000 statute miles is approximately _______ nautical miles

162,000

While the distance of the statute mile is approximately 5,280 feet, the distance for a nautical mile is approximately _________ feet.

6,080

Radiated energy from a radar set travels at approximately ____ feet per microsecond

Time for energy to travel one nautical mile is _____ microseconds.

Because two-way travel is involved, a total time of _____ microseconds per nautical mile will elapse between the start of the pulse from the antenna and its return to the antenna from a target.

________ microsecond time interval is sometimes referred to as a RADAR MILE, RADAR NAUTICAL MILE, or NAUTICAL RADAR MILE.

_______ scanning is used in fire-control tracking radars

monopulse

With _________ (SIMULTANEOUS) LOBING, all range, bearing, and elevation-angle information of a target is obtained from a single pulse

When radio-frequency energy transmitted from a fixed point continuously strikes an object that is either moving toward or away from the source of the energy, the frequency of the reflected energy is changed. This shift in frequency is known as the ______________.

________RADAR, is designed to continuously scan a volume of space to provide initial detection of all targets.

Search

_______ radar provides continuous range, bearing, and elevation data on one or more targets.

Track

Klystrons, magnetrons, rectifiers, or other tubes that employ an excitation of _______ volts or

more may emit X rays out to a few feet; thus, unshielded personnel standing or working close to the tubes will be endangered.

15,000