Flashcards in NAVEDTRA 14190A NEETS Mod. 18, Ch. 1 Deck (43)
Which term is used to refer to electronic equipment that detect the presence, direction, height, and distance of objects by using reflected electromagnetic energy?
What is used by radar sets to determine the direction and distance of the reflecting object?
The surface of the earth is represented by an imaginary flat plane, tangent (or parallel) to the earth’s surface at that location. What is this plane referred to as?
What is the line from the radar set directly to the object referred to as?
Line of Sight (LoS)
What is the angle called between the horizontal plane and the los?
Approximately how many statute miles per second does electromagnetic energy travel through the air?
Approximately how many nautical miles are equal to 186,000 statute miles?
Approximately how many feet are there per nautical mile?
What is radar timing usually expressed in?
Approximately how many feet per microsecond does radiated energy from a radar set travel at?
The range in nautical miles to an object can be found by measuring the elapsed time during a round trip of a radar pulse and dividing this quantity by what number?
Which pulse property determines the maximum range that the pulse can travel to a target and still return a usable echo?
What is the smallest signal called that is detectable by a receiver system that can be processed and presented on an indicator?
What is the frequency of the rf energy in the pulse radiated by a radar referred to as?
Radio frequency energy above what frequency is rapidly attenuated by the atmosphere?
What is used to calculate both the peak power and average power of a radar system?
Which radar target property is the angle between true north and a line pointed directly at the target?
Which radar systems are designed to determine only the range and bearing of an object?
Which type of search radar system detects altitude as well as range and bearing?
Which radar property is defined as its ability to distinguish between targets that are very close together in either range or bearing?
Which two categories is resolution usually divided into?
Range and Bearing
What is the ability referred to as of a radar system to distinguish between two or more targets on the same bearing but at different ranges?
What is the ability of a radar system to separate objects at the same range but at different bearings?
What is a measure of the ability of a radar system to determine the correct range, bearing, and, in some cases, height of an object?
What is the bending of electromagnetic waves caused by a change in the density of the medium through which the waves are passing?
What ensures that all circuits connected with the radar system operate in a definite timed relationship?
What is essentially an electronic switch that permits a radar system to use a single antenna to both transmit and receive?
What is the systematic movement of a radar beam in a definite pattern while searching for or tracking a target?
Which type of scanning is unsuitable for use as a tracking radar?