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How long does it take a radar signal to go and return to the originating radar unit from an airplane that is 275 mi away?
Wiki User
∙ 13y ago
2.953 milliseconds = 0.002953 second (rounded)
Wiki User
∙ 13y ago
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What is minimum detectable signal in a radar system?
the minimum discernible signal is the ability of the radar to detect the smallest return echo,this feature requires performing test according to situation display data
How does stealth technology work?
The goal of stealth technology is to make an airplane invisible to radar. There are two different ways to create invisibility:The airplane can be shaped so that any radar signals it reflects are reflected away from the radar equipment.The airplane can be covered in materials that absorb radar signals.
Does radar determine the size of an object?
Radar is usually used only to determine where something is, not how large it is, because the strength of the reflection depends upon the reflectivity of the surface, the distance of the object, and the size of the object; a large wooden object can return less of a signal than a much smaller metal object, for example. It's too complicated a problem. But if you already know that you are looking, let us say, for an airplane, then radar is very good at showing you where the plane is.
What is the time required for a pulse of radar waves to reach an airplane 5 km away and return?
Radar waves travel at the speed of light, approximately 300,000 km/second, so it would take 1/30,000 second for them to make the 10 km round trip.
What does radar use to determine velocity and location of objects?
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. - - - - - 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. ----- 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.
How much time would elapse between sending of a radar signal to the moon and the return of the signal?
about 2.56 seconds
What is minimum detectable signal in a radar system?
the minimum discernible signal is the ability of the radar to detect the smallest return echo,this feature requires performing test according to situation display data
How does the frequency of a cars returning radar signal change if the car moves away from the radar source?
The frequency of the radar signal does not change. Be it a cop getting you speed, or a modern car with Brake assist (they use a radar signal to assist keeping a safe distance) it's all timing, how long from the radar source to return to source. If a police car is still, and you are moving away, the increase in return of signal time tells the computer in the officer's car your speed. Even if you are going toward each other, the computer knows the speed of the officer's car and again, signal return time factored in with speed of cop car the computer can give an instant, real-time speed.
What do transponders on aircrafts do?
They do a few different things these days but their primary role is that of radar. The use of radar that flies from a station, hits the aircraft and bounces back to the station is very limited. In most normal situations the ground station sends out a signal. The transponder receives the signal and transmits the return signal. It allows for greater range of the radar and also allows extra info to be passed to the radar controller like height and aircraft ID. This is known as Secondary Radar.
What detects airplane in air?
Radar.
How does stealth technology work?
The goal of stealth technology is to make an airplane invisible to radar. There are two different ways to create invisibility:The airplane can be shaped so that any radar signals it reflects are reflected away from the radar equipment.The airplane can be covered in materials that absorb radar signals.
What is the main advantages of Doppler radar over conventional weather radar?
Conventional radar works by transmitting short pulses of electromagnetic energy. A small fraction of the waves that are sent out is scattered by a storm and returned to the radar, the strength of the returning signal indicates rainfall intensity and the time difference between the transmission and return of the signal indicates the distance of the storm. Doppler radar not only performs the same tasks as convention radar but also has the ability to detect motion patterns associated with tornadoes and severe thunderstorms, the conventional radar cannot.
Do scientists believe that mars has water underground?
Yes, but not LIQUID water. In many cases, it's possible to detect things that are underground by radar, and by the type of return signal, figure out what kind of thing the radar pulse hit. Scientists controlling the Mars Surveyor satellite have bounced radar beams off of the north polar regions of Mars, and the return signal indicates that at least some water ice is buried a few centimeters underground.
Does radar determine the size of an object?
Radar is usually used only to determine where something is, not how large it is, because the strength of the reflection depends upon the reflectivity of the surface, the distance of the object, and the size of the object; a large wooden object can return less of a signal than a much smaller metal object, for example. It's too complicated a problem. But if you already know that you are looking, let us say, for an airplane, then radar is very good at showing you where the plane is.
What is the movable horizontal piece on the tail of the airplane?
radar
Why are some devices not detected by the radar?
airplane..bwahahahaha....
What is a reflected radar signal called?
Returns.
