It's a long story, but I'll give you the TL;DR version:
Use electricity -> use components to change wavelength of electric signal -> shoot out the signal from an antenna -> it bounces back into the radar dish (think of it like a catcher's mitt) -> process the results with computers
It's an echo.
You know what an echo is, right?
Instead of a human voice, radar shouts with invisible electromagnetic waves. The waves bounce off objects (particularly metal) and echo back. The echos are processed into a picture to visualize the area.
imagine shining a flashlight at something in a dark room and figuring out what it is and how far away it is by how much light is reflected back. that's basically what radar is. the beams are just invisible
If its an active antenna it does, just not in the visible spectrum. If it's a passive antenna it doesn't actually project anything, just sits there and listens like a light sensor. But you can't really use passive antennas for radar.
If you could see radio and microwaves you'd see bunch of flickering dots all over the place through walls. Bluer dots are high frequency like wifi and cell towers and red ones are longer range radio. A radar jamming you would be like a super bright strobe light.
The missile knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is - whichever is greater - it obtains a difference or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the missile from a position where it is to a position where it isn't, and arriving at a position that it wasn't, it now is. Consequently, the position where it is is now the position that it wasn't, and if follows that the position that it was is now the position that it isn't. In the event that the position that the position that it is in is not the position that it wasn't, the system has acquired a variation. The variation being the difference between where the missile is and where it wasn't. If variation is considered to be a significant factor, it too may be corrected by the GEA. However, the missile must also know where it was. The missile guidance computer scenario works as follows: Because a variation has modified some of the information that the missile has obtained, it is not sure just where it is. However, it is sure where it isn't, within reason, and it know where it was. It now subtracts where it should be from where it wasn't, or vice versa. And by differentiating this from the algebraic sum of where it shouldn't be and where it was, it is able to obtain the deviation and its variation, which is called error.
send a radio wave out, it bounces off something and comes back and you have a sensor to detect the return waves (you may get multiple echoes if there are multiple objects). that's simple and easy, but all it gets you is "something is out there in the direction you got the reflection from".
To find out how far away it is takes a couple of clever bits. Clever bit #1: you arrange your sensor so it can hear both your outgoing radio wave and any incoming radio waves. Clever bit #2: you constantly and rapidly change the frequency of your outgoing radio wave, cycling from low to high frequency (or vice versa, doesn't matter much). Clever bit #3: subtract the outgoing frequency from the incoming frequencies. The resulting values (the differences between the outgoing and incoming frequencies) is directly proportional to the distance the reflections came from, the distance is related to the speed at which you're sweeping the frequency.
with FFTs you can do other clever things like detect partially radar-transparent materials, estimate density of the target, estimate relative velocities, etc. but the previous paragraph is basically how the original WW2 radar worked.
radar swings its electromagnetic dick, sending waves through the electromagnetic field
the radar listens for the reflected waves, analyzes how these waves have changed, and calculates position, velocity and distance to the target
Imagine you were using a flashlight. You know exactly how fast light travels. So when you see something you can measure the time between you switched the flashlight on and the very moment you see the object. So now you know how far away it is and how it looks like.
Radar works the same just not through visible light. Goes like this >Emitter sends out radio waves >They bounce off of other objects end get directed back to their source >At the source you got your radar dish >Electronics analyze the reflected signal. So you get to know something IS there, how high and far away it is, in which direction it moves and, depending on the quality of the radar, you even get an idea how large and fast it is.
tl;dr: It's all about signal reflection and measuring time and angle.
it is an insect eye. when one cell detects, you calculate the time till next cell is active and frequency distortion, this calculate range and velocity through simple linear algebra and you can program missile to interidct on that curve where its own detection and guidence systems take over . this is high school physics, if you dont this stuff inside out you shouldnt really be getting into modern military things
So basically is a spinning antana. Out has come energy wave. When something is there waves is come back but wave is change.
Spin dish has collect wave and does know what has change. Sweep line on screen. Different wave show small dot. Make ping noise.
Man has seen this issue command "fire missiles". Missiles can go to dot location, target is destroy.
How does sex work?
It's easy! You stick ugh..., you stick ???? ughhh intoooooo ughhhhhh
>The motion of sex generates the same shape of the sine wavelength used in radars, so this is actually relevant to the thread.
I hate being a knower
Are you fricking serious?
>Are you fricking serious?
If he's doing any fricking, apparently it's at the frequency of whatever radar he's talking about.
>Mfw THF
what?
>have sex at a freq (x+pi) out of sync with oncoming radar
>become radar invisible due to destructive interference
>the penis knows where it is because it knows where it isn't...
It's a long story, but I'll give you the TL;DR version:
Use electricity -> use components to change wavelength of electric signal -> shoot out the signal from an antenna -> it bounces back into the radar dish (think of it like a catcher's mitt) -> process the results with computers
bump
Send out wavelength from thousands of dielectric lens and detect returns including 3d map battlefield.
waves projected out waves come back if they hit something and let you know its there
i hate barney
It's an echo.
You know what an echo is, right?
Instead of a human voice, radar shouts with invisible electromagnetic waves. The waves bounce off objects (particularly metal) and echo back. The echos are processed into a picture to visualize the area.
imagine shining a flashlight at something in a dark room and figuring out what it is and how far away it is by how much light is reflected back. that's basically what radar is. the beams are just invisible
>Radars are flashlights
Why don't antennas light up at night?
I don't understand this question. I said the beams are invisible. what sort of autistic handholding do you need here?
Because the frequency is outside the visible range of the electromagnetic spectrum. It is a form of light, but not one our eyes can see.
They do, but not in visible for human eye part of spectrum.
If its an active antenna it does, just not in the visible spectrum. If it's a passive antenna it doesn't actually project anything, just sits there and listens like a light sensor. But you can't really use passive antennas for radar.
If you could see radio and microwaves you'd see bunch of flickering dots all over the place through walls. Bluer dots are high frequency like wifi and cell towers and red ones are longer range radio. A radar jamming you would be like a super bright strobe light.
They do if you see in that spectrum of light.
Similar to sonar just out of water so it cant use waves
the radar knows where stuff is because it knows where it isnt
It yells really really loudly into the sky and listens for any echos
Radar is a myth perpetuated by MIC to sell ugly origami shaped military craft.
The missile knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is - whichever is greater - it obtains a difference or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the missile from a position where it is to a position where it isn't, and arriving at a position that it wasn't, it now is. Consequently, the position where it is is now the position that it wasn't, and if follows that the position that it was is now the position that it isn't. In the event that the position that the position that it is in is not the position that it wasn't, the system has acquired a variation. The variation being the difference between where the missile is and where it wasn't. If variation is considered to be a significant factor, it too may be corrected by the GEA. However, the missile must also know where it was. The missile guidance computer scenario works as follows: Because a variation has modified some of the information that the missile has obtained, it is not sure just where it is. However, it is sure where it isn't, within reason, and it know where it was. It now subtracts where it should be from where it wasn't, or vice versa. And by differentiating this from the algebraic sum of where it shouldn't be and where it was, it is able to obtain the deviation and its variation, which is called error.
send a radio wave out, it bounces off something and comes back and you have a sensor to detect the return waves (you may get multiple echoes if there are multiple objects). that's simple and easy, but all it gets you is "something is out there in the direction you got the reflection from".
To find out how far away it is takes a couple of clever bits. Clever bit #1: you arrange your sensor so it can hear both your outgoing radio wave and any incoming radio waves. Clever bit #2: you constantly and rapidly change the frequency of your outgoing radio wave, cycling from low to high frequency (or vice versa, doesn't matter much). Clever bit #3: subtract the outgoing frequency from the incoming frequencies. The resulting values (the differences between the outgoing and incoming frequencies) is directly proportional to the distance the reflections came from, the distance is related to the speed at which you're sweeping the frequency.
with FFTs you can do other clever things like detect partially radar-transparent materials, estimate density of the target, estimate relative velocities, etc. but the previous paragraph is basically how the original WW2 radar worked.
radar swings its electromagnetic dick, sending waves through the electromagnetic field
the radar listens for the reflected waves, analyzes how these waves have changed, and calculates position, velocity and distance to the target
it knows where it is because it knows where it isnt
It doesn't
It goes beep and the target goes boop.
Imagine you were using a flashlight. You know exactly how fast light travels. So when you see something you can measure the time between you switched the flashlight on and the very moment you see the object. So now you know how far away it is and how it looks like.
Radar works the same just not through visible light. Goes like this
>Emitter sends out radio waves
>They bounce off of other objects end get directed back to their source
>At the source you got your radar dish
>Electronics analyze the reflected signal. So you get to know something IS there, how high and far away it is, in which direction it moves and, depending on the quality of the radar, you even get an idea how large and fast it is.
tl;dr: It's all about signal reflection and measuring time and angle.
it doesn't. radar is a spook
Why is there a sukhoi inside what looks like a giant RPG round?
>:DDDDDDDD
>DDDDDDDD:
>:O
I don't understand
I'm speaking of OP's pic. What is going on there?
Not an RPG, it's fanfic of a SU on top of an ICBM.
it is an insect eye. when one cell detects, you calculate the time till next cell is active and frequency distortion, this calculate range and velocity through simple linear algebra and you can program missile to interidct on that curve where its own detection and guidence systems take over . this is high school physics, if you dont this stuff inside out you shouldnt really be getting into modern military things
So basically is a spinning antana. Out has come energy wave. When something is there waves is come back but wave is change.
Spin dish has collect wave and does know what has change. Sweep line on screen. Different wave show small dot. Make ping noise.
Man has seen this issue command "fire missiles". Missiles can go to dot location, target is destroy.
Use a search engine you SFN