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GiTS
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How does radar find the position of an object? And how does radar make an image? Isn't the reicever a dish so wouldn't only be able to receive magnitude related information like a microphone does with sound?
You need to be a little more specific. What are you taking a picture of? What information do you want in that picture? Is your radar mobile or stationary?GiTS said:So if I wanted to take a picture with radar or lidar, how would i do it?
billiards said:A more interesting question is whether the radar is Euclidean or Lagrangian.
Both pulsed and continuous wave radar schemes exist. The basic continuous wave radar scheme only detects moving targets where the doppler shift moves the "echo" sufficiently far away from the transmitter. You can also do frequency-modulated continuous wave radar in order to get the ranging information. So, you send out a chirp, and you listen for a delayed and doppler shifted version of the chirp. The delay gives you the range and the doppler shift gives you the speed of the target.phlegmy said:does the radar dish send out pulses of em waves or a continuous one?
if its continuous then how is the time between emmiting and receiving measured.
eg, if i have a radar dish pointed only in one direction and its emmitting radar waves continuously, suddenly it dectects a reflected one? hows it to know the time at which the reflected wave was emmited?? (unless it continuously changes frequency?, is the reflected frequency the same as the emmitted??) lol thanks :D
Radar uses radio waves to send out pulses of energy. When these pulses hit an object, some of the energy is reflected back to the radar receiver. By measuring the time it takes for the pulse to go out and return, the radar can calculate the distance to the object.
Primary radar uses its own energy to locate objects, while secondary radar relies on objects sending back a signal from a transponder. Primary radar is typically used for long-range detection, while secondary radar is used for short-range identification and tracking of specific objects.
Doppler radar measures the frequency of the reflected radio waves. When an object is moving towards or away from the radar, the frequency of the reflected waves will change. This change in frequency is used to calculate the object's speed.
Yes, radar can detect objects in bad weather such as rain, fog, or snow. However, heavy precipitation can sometimes cause interference and reduce the accuracy of the radar's readings.
Radar uses a technique called triangulation to determine the position of an object in 3D space. By using multiple radar antennas at different locations, the radar can measure the angle of the reflected energy and use trigonometry to calculate the object's position in space.