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Radar is a surveillance technology that uses radio waves to determine the range (and azimuth) of an aircraft. It works by measuring the time difference between a radio transmission and the echo or reply to that transmission. Radars are the most common surveillance equipment used by ATC.

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Do special procedures exist for commercial pilots flying over Russia?

Since Russia, and in particular the Asian part of it, is huge, I was wondering if there are special procedures for commercial pilots to follow over Russia (in particular and specifically Siberia and ...
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What are these FAA facilities in Seattle doing?

While walking in Discovery Park I discovered this radar dome with FAA notices on its fence. And not far away I cam across this small FAA signed radio antenna and shack. Any idea what these ...
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UHF transmitter Range for 50Watts [migrated]

Very curious to know the range of 50Wats transmitter of UHF range in nautical miles?The antenna used is 1/4 wave antenna of Jaybeam company. Can someone tell the exact formulation to find out the ...
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How does the radio altimeter reading change with the bank angle?

How does the radio altimeter reading change with the bank angle? Following example: Let's say, we're flying at 1000' AGL and a bank angle of 0° above a endless flat surface. The radio altimeter shows ...
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Why were these Hawkeyes flying in a circular pattern?

A couple of months ago I was near the Wallops Flight Facility in Virginia, when I saw 3 or 4 planes flying in a tight circular pattern. The planes were on the larger side, prop driven and had large ...
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114 views

Does the FAA prescribe radar cross-section requirements for civilian aircraft?

Are there any FAA regulations stipulating the minimum permissible radar cross section for civilian aircraft (i.e., making sure that civilian aircraft are at least such-and-such cross-section visible ...
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What does the ASDE-X ground radar unit look like?

Above is a picture of a primary / secondary surveillance radar combo (top is secondary, bottom is primary). What does the ASDE-X radar unit look like in real life?
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Is it possible for ATC to see who’s transmitting on the radio on their radar?

I don’t think ATC currently has the capability of seeing who’s actually transmitting on the frequency. If technology permits (probably by making a connection between the radios and the transponder), ...
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197 views

How does ATC radar display differ from military radar?

Could you summarize what sort of data/objects are present in one type of display but not another? (not asking about construction differences, just the user-facing end, the display/interface.) A ...
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How can a single misplaced screw so massively increase a stealth aircraft's radar cross-section?

In this comment on one of the answers to an earlier question of mine, @CarloFelicione points out how even the tiniest of imperfections can make a stealth aircraft much more visible to radar: A ...
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43 views

Maximum Altitude/Minimum Range limits of ATC PSR

I am trying to get an understanding of the ability of an air traffic control primary radar such as an ATCR-33 to track high flying targets (above 40,000 feet) at relatively close ranges (less than 15 ...
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Where can I find Radar Video Maps?

I have been taking a look at Standard Operating Procedures for airports in the N90 TRACON, as is evident from my earlier relevant question. I can see the airspace delegation clearly defining upper ...
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Could an AN/APG-79 AESA radar “lock-on” a single bird?

Could a fighter pilot in 2015 using an AN/APG-79 AESA radar "lock-on" a single bird? I know that modern radars like the AN/APG-79 in modern combat aircraft like the F/A-18F filter out false alarms ...
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Why does the radome on the AWACS rotate?

I'm not sure I understand why the radome on the AWACS aircraft is so large, and could somebody explain the design and why it has to rotate?
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Is there a database of European surveillance radar installations?

Does anybody know a link to a database or appropriate webpage where I can find the locations of surveillance radar installations in Europe?
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168 views

Why does AH-64 Apache have its radar over its rotors? [duplicate]

The targeting radar is above the rotor assembly ! But why ?
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324 views

Does the radar altimeter's position affect its accuracy?

I have seen the location of the radar altimeter is different between Airbus and Boeing. Airbus has it almost at the tail, Boeing has it forwards. I would like to know which one gives the height more ...
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Is Doppler navigation still in use for civilian aircraft?

Is it possible to find an airliner nowadays with Doppler radar used for navigation purposes?
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310 views

Does the F-4E Phantom II have a weather radar?

Here's the cockpit of the F-4E: The Main Panel NO7 says "Radar Scope" and when you put your mouse cursor on that "magician globe", the X-Plane 8.15 tooltip says "Weather Radar". So, what is that ...
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How does radar receive Mode C information?

I know primary radar of ASR can determine only slant range, so by using Mode C transponder, ATC can know the altitude of aircraft. And I found that if altimeter setting of radar is changed, displayed ...
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What is the energy demand of a secondary surveillance radar?

I'm writing a report to see if it's feasible to power a secondary surveillance radar with wind energy. I'm having trouble with sizing the turbine but I can't seem to find an energy demand for a SSR ...
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2answers
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Are radar bars centered around the horizon or do they move with aircraft pitch?

Say I am in a military aircraft with a non-AESA radar. The radar is set to scan 4 elevation bars, so when I fly level, 2 above and 2 below the horizon. If I pitch 20 degs up, will it continue to scan ...
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Did the Stuka Ju-87 really have a radio altimeter? If so, when?

This is what Wikipedia says near the end of its radio altimeter article: The radio altimeter first showed up in the German Junkers Ju-87 "Stuka" dive bomber which was equipped with one for ...
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346 views

Do aircraft have radar or other forms of traffic sensing?

Quicky question. Do modern commercial aircraft include radar to detect traffic in their vicinity or perhaps have some mechanism to receive transponder signals. I know they have forward facing ...
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What is the equivalence of Meteksan MILDAR in US inventory?

This is called MILDAR radar. This is manufactured by a Turkish company named Meteksan. Is this Turkish equivalent of Longbow radar? If yes, why is that radar pylon-mounted rather than mast-mounted?...
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How does a runway inspection radar work?

In AC 150/5220-24 FAA mentions radar equipment to detect foreign object debris (FOD) on runways, based on stationary and mobile radars with an astronomical precision, e.g. able to detect an object as ...
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483 views

Which one has a higher success rate between Infrared homing and Radar homing missiles, for air to air combat?

I know Infrared missiles don't work on long ranges, so I will keep my question limited to short ranges only, in which both missiles can work. In such short ranges, which guidance system has more ...
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How did the gyro gunsights of WW2 get the range and lead of a target?

I just read this article on the gyro gunsight, but I don't understand how it computed range/position to the target and then calculated how much lead is needed. Surely it must have had radar to get ...
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How do military radars detect the type of an aircraft?

How do the military air defense radars and aircraft radars detect the type of an aircraft and enemy or friendly information?
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Do military jets radar jammers block their own radar? And, if not, why not?

Will a noise jammer block the fighter's own radar? If I have understood it, a noise jammer, e.g., a barrage jammer, will emit a noise signal across a wide frequency band. Won't this make it hard to ...
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725 views

How do military fighter aircraft identify themselves and each other?

I live in an area where there is much NATO military activity. Often there are various fighter aircraft fly-overs. But none of the common websites such as flightradar24, flightaware and ...
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3k views

What is this radar-like thing?

A friend of mine sent me this picture, which Is somewhere in Miami. But I don't seem to recognize it
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574 views

Can the signature of stealth fighters be uncovered, and then used for future detections?

A recent theaviationist.com article speculates that the reason behind the 'Combat Sent' and other SIGINT aircraft escorting the F-35's over Estonia two days ago was to deter Russia from using its ...
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Does a secondary surveillance radar need the support of a primary surveillance radar?

ATC technologies are evolving to include other components than primary and secondary surveillance radars, but I believe these two pieces of equipment are still the backbone of ATC. Primary radar (PSR, ...
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Did British aircraft fly at a specific speed while returning from missions during WWII?

I remember reading a whole lot ago (so I am currently unable to find the reference, sorry) that during WWII, British aircraft would return from missions at a specific speed that was unattainable from ...
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What parts of Austrian airspace are not covered by primary radars?

I'm writing a story about the pilot of the Austrian Air Force, who uses his Eurofighter Typhoon aircraft for unintended purposes. In scope of another question we figured out that by turning off the ...
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639 views

What is meant by a fused radar track?

Can anyone explain what a fused track is from the perspective of radar?
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Are ground crews at danger for radiation from WX radar? [duplicate]

I am under the impression that the radiation from a weather radar on the nose/wing of aircraft can cause enough radiation to render ground workers sterile/cause cellular damage if the pilot forgets to ...
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Is the weather radar on and active during the whole flight?

The title says it all: Do airline pilots leave the aircraft's weather radar on at all times during the flight and display the data on one or both of the Navigation Displays, or only if clouds/ weather ...
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Can lasers be used for weather detection along an aircraft's flight path?

Aircraft use RADAR for weather detection such as storm clouds, rain, etc. Why don't they use LASER instead to measure the density of the weather ahead? RADAR has been known to return false signals of ...
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Do helicopters carry radar equipment? Is so, where is it placed and what type is used?

Do helicopters carry radar equipment and if so, where is it? (e.g. in the nose section like a fixed-wing aircraft). Also what type do they use? (e.g what type of radar would a maritime helicopter ...
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Why does the radar dome on the E-3 have a white stripe down the middle?

Every picture I can find of the E-3 has a blue/black radar dome on top with a fairly thick white stripe down the middle but I can't figure out why. Is it related to the position of the radar unit ...
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851 views

What is in 'stealth paint' to reflect radar, and how does it work?

What is in the 'stealth paint' that coats stealth bombers e.g B-2 spirit, and stealth aircraft, e.g SR-71, and how does it absorb/deflect radar?
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Why does weather radar not report some precipitation?

Not sure this is the right place for this, but how come I look at the radar sometimes and, despite it clearly raining at my present location, it doesn't show any precipitation? Example is right now at ...
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Can air-superiority radar function as weather radar?

Can the big, fat, sophisticated air-superiority radar in a modern fighter aircraft's nose serve as a weather radar for navigation in stormy conditions? Alternatively would a datalink from somebody ...
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How is the terrain displayed on the ND in a A320?

When you turn on "TERR ON ND" in a A320, you see terrain info on you navigation display (ND), but where does its source come from ? if data comes from FMGS stored inside its memory, then how come it ...
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Which map projection is typically used on ATC radar screens?

Displaying a (roughly) spherical surface on a flat map turns out to be pretty difficult. There are many different map projections, each with their advantages and disadvantages. Some of the most common ...
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2answers
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Can radars detect small drones?

I've just started working with weather radars and such. With weather radars, it is possible to detect bird migrations with a specific algorithm and a lot of information about birds, but it would be a ...
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What is the best way to retrieve (and transmit) location (GPS) of plane in real time?

What are some of the best ways to retrieve and transmit the location of a plane I am in, real time. To speak in realistic terms, I'm currently training for my private pilot's license and as such am ...
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Which airports in Ireland use Surface Movement Radar?

I know that Dublin uses SMR, but do any other airports in Ireland use it?