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Radar sends out a signal, either radio waves or microwaves. The signal then reflects off of objects and back to the radar. The radar logic calculates the time it takes for the signal to return and can then calculate the distance. The velocity is then measured by the rate of change in distance or by doppler shift. The doppler shift is a change in the frequency of the signal, as the signal is either compressed or stretched from impact with a moving object. The signal frequency is compressed if the object is moving toward the radar and stretched if the object is moving away.
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Almost.
Radar uses two inputs to determine the location of an object.
The first is the length of time it takes the radar pulse to reach the target and return to the antenna. The speed of radio waves is 300,000 km/sec. Since it's got to go out and come back, divide that by two--so, if you send out 100 pulses per second and the antenna doesn't move, the radar can detect targets up to 1500 km away. (Since the antenna on a radar normally is movable, things get more complex than I want to get into at one in the morning, sorry.)
The other is the position of the antenna. If your guy shows up at a 300-degree antenna position and it takes 0.01 millisecond for the pulse to return, he's 1.5 kilometers from your antenna at that specific azimuth.
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Right on jmoreader. Also, the questioner should know that there are several different types of radar. Weather, Aircraft, or even the radar gun that cops use to check your speed. All of which work a little differently but rely on the same principles. A radar gun being the most simple as it doesn't really collect rangeing or position data, only velocity I believe. One interesting system is Composite Radar used for weather. There are inherent problems in using a single radar facility to view areas of rain, snow, or even turbulence within a storm cell. Most of the so called "curtain" effect is overcome by using several radar sites in different locations. When you view weather radar on television or elsewhere, the image you see is actually a computer generated image comprised from data collected by multiple radar locations. Viewing the weather from different "angles" provides a more complete and much more accurate image of the actual weather condition.
As jmoreader pointed out, radar systems are generally quite complicated, but, the basic principles are fairly simple and common across the board. Send a signal out and analyze the return.
What else can I help you with?
Which rays does radar use?
Radar uses radio waves for detecting and tracking objects. These radio waves are emitted by the radar system and bounce off nearby objects, with the reflected waves then being detected by the radar receiver to determine the object's location and speed.
Radar cannot determine?
Radar cannot determine the composition or material of an object, but it can detect and track the presence of objects based on their size, shape, and movement. Radar uses radio waves to detect the presence of objects by sending out pulses of electromagnetic energy and detecting the reflections off the objects.
What form of radiant energy is used in radar?
Microwave radiation is the form of radiant energy used in radar systems. Radar systems emit pulses of microwave radiation and then detect the reflections of these pulses off of objects in order to determine their location, speed, and other properties.
What device uses reflected electromagnetic waves to measure the distance and direction of faraway objects?
A radar device uses reflected electromagnetic waves to measure the distance and direction of faraway objects. Radar systems emit radio waves and analyze the signals that bounce back to determine the location and movement of objects like aircraft, ships, or weather formations.
What are some uses of the Doppler Effect?
Doppler's effect uses : It is used to compute the velocities of stars relative to earth by noting change in wavelength. It is also used to detect moving objects like aircraft by reflect of the radar waves. It is used to determine the velocity of the submarine by sonar.
Which rays does radar use?
Radar uses radio waves for detecting and tracking objects. These radio waves are emitted by the radar system and bounce off nearby objects, with the reflected waves then being detected by the radar receiver to determine the object's location and speed.
A map making instrument that sends a signal and waits for it to bounce off of objects to determine their location?
imaging radar
Radar cannot determine?
Radar cannot determine the composition or material of an object, but it can detect and track the presence of objects based on their size, shape, and movement. Radar uses radio waves to detect the presence of objects by sending out pulses of electromagnetic energy and detecting the reflections off the objects.
What is the technique that uses the reflection of electromagnetic waves to determine the location or direction of outside objects?
RADAR determines the distance and direction to anything that reflectsradio waves ... usually material objects, but it responds to atmosphericphenomena too.
What form of radiant energy is used in radar?
Microwave radiation is the form of radiant energy used in radar systems. Radar systems emit pulses of microwave radiation and then detect the reflections of these pulses off of objects in order to determine their location, speed, and other properties.
How do you write radar in plural form?
The noun radar does not have a plural form. Radar is an uncountable noun, a word for a system of detecting distant objects to determine their position, velocity, or other characteristics by analysis of very high frequency radio waves. Radar is an uncountable aggregate noun, a word representing an indefinite number of parts. The word radar began as an acronym for: RAdio Detecting And Ranging
What does radar look like?
like a poke radar
What uses radio waves to find an objects location?
RADAR (RAdio Detection And Ranging)
What device uses reflected electromagnetic waves to measure the distance and direction of faraway objects?
A radar device uses reflected electromagnetic waves to measure the distance and direction of faraway objects. Radar systems emit radio waves and analyze the signals that bounce back to determine the location and movement of objects like aircraft, ships, or weather formations.
What is the difference between a Doppler radar and a regular radar?
Normal radar sends out radio waves to determine the location of an object. Doppler radar can not only find the location of an object or storm, but using something known as the Doppler effect can determine how fast it is moving towards or away from the radar.
What are some uses of the Doppler Effect?
Doppler's effect uses : It is used to compute the velocities of stars relative to earth by noting change in wavelength. It is also used to detect moving objects like aircraft by reflect of the radar waves. It is used to determine the velocity of the submarine by sonar.
What kind of radio waves bounce off an object to determine its speed and location?
radar
