Why don't airplanes radar set off radar detectors?? [Archive]

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StlouisX50

11-29-2006, 08:43 AM

I have been wondering why air plane radar does not set off radar detectors.

I know radar is used but why does a radar detector not pick up aircraft flying above?

jimbonzzz

11-29-2006, 08:48 AM

I'm no aircraft expert, but as far as I know, they don't use anything in the police radar bands...

If you want to detect aircraft, you need one of these :lol:

http://www.guysoflidar.com/museum/spybuster_1.jpg

StlouisX50

11-29-2006, 08:55 AM

That device looks neat, however I don't think i'd want one of those, due to it being a terrorist type of device now days. It would just be asking for trouble if you got seen with it.

AV8TOR

11-29-2006, 09:16 AM

Definitely different frequency. I have a radio in my car but it does not pick up Satellite radio. Same thing.

kpatz

11-29-2006, 10:21 AM

That device looks neat, however I don't think i'd want one of those, due to it being a terrorist type of device now days. It would just be asking for trouble if you got seen with it.A device that beeps when it picks up a signal on frequencies used by pilots is considered a terrorist device? That's no more a terrorist device than your X50.

StlouisX50

11-29-2006, 10:24 AM

Well, if it was used to track planes, it could be considdered one.

The x50 tracks police radar, not large public transport.

compu44

11-29-2006, 10:38 AM

The device that Jim posted doesn't track commerial planes, rather it tracks some frequency that was commonly used in police planes using VASCAR. (At least that was my understanding of what those do)

StlouisX50

11-29-2006, 10:40 AM

Such as the Cessna's or however you spell it. I found it from an old post.

SmaartAasSaabr

11-29-2006, 10:48 AM

That device looks neat, however I don't think i'd want one of those, due to it being a terrorist type of device now days. It would just be asking for trouble if you got seen with it.

Terrorist device? :lol:

Arashi666

11-29-2006, 01:17 PM

Like Jim said they operate on bands outside of our RDs range, however some newer military aircraft RADARs operate using a pulse doppler X-band RADAR, so maybe if you want to pick up an F-22 coming at you, by all means keep the X-band sensors on :wink:

cooljay

11-29-2006, 01:59 PM

Yep different bands. I think they are mainly in the S-L band.

lol you can track commercial aircraft online if you wanted and it's not a terrorist tool nor considered one. I'm a big aviation fan and I use to have a program that you could pay a monthly subscription for and you could track any plane be it commercial or not coming into/flying in/leaving from the US. Also there are several sites that offer free streaming ATC audio for most of the major airports in the US.

Was a very nice program to have when you wanted to know who's buzzing your house :lol:

alias3r

11-29-2006, 03:47 PM

RadarRick

11-29-2006, 04:14 PM

An aircraft detector :lol: :lol: :lol: :lol: :lol: :lol: :lol:
RR

roleary

11-29-2006, 04:18 PM

I always thought, at least here in CA, that the planes overhead look at large white mileage marker stripes on the side of the road. They look for fast moving cars, and if they see one, they time it between these markers. They use a table to determine what speed the vehicle is going, and then call it in to a ground unit if they're speeding.

Also, I've read that the law here in CA states that measuring your speed by air alone is not sufficient. The ground unit has to get your speed also. So, if a plane sees you and radios it in, if you can avoid being radar'ed, lase'd, or paced by the ground unit, you can get out of it. Though they'll probably write you a ticket anyway and you'll have to go to court to get it thrown out.

Of course, I could be completely wrong on both points in which case you just wasted 45 seconds of your life reading this.

- O

RadarRick

11-29-2006, 04:18 PM

i always thought that planes took peoples speeds by taking a series of pictures and then determining what altitude the plane is at, and the distance between the cars in photos, they could make up a formula to figure out your speed. thats what i thought...

No, not quite mate. Here's something i picked this off a web page because i'm to lazy :?

VASCAR (Visual Average Speed Computer and Recorder) is really a stopwatch coupled with a calculator. Once a distance is entered, the operator pushes a button to start then stop the stopwatch. VASCAR displays the speed calculated from the distance entered and the time measured.
Web publishing by 3D RESEARCH
Please report problems to web@3dresearch.com

RR

asianfire

11-29-2006, 06:26 PM

Perhaps the angle of the RD isn't aiming straight up enough.... sorry, being a smart, you know what again.

proudNMAmember

11-29-2006, 07:53 PM

Jim, where do you get one of those spybusters gadgets?

jimbonzzz

11-29-2006, 08:49 PM

Jim, where do you get one of those spybusters gadgets?

Well, they were made by Electrolert (Company who made the Fuzzbuster) and were only sold briefly in the late 80's I believe. So, you have to look around on the used market for one, they are a bit scarce but there's some floating around out there...

Orbital75

11-29-2006, 09:18 PM

I'm working on this great new anti-aircraft Vascar device.
They just hone in and take out the aircraft.
In "Auto Mode" it will launch a 2nd SAM if the 1st misses.
Think Roy would be interested?

http://img142.imageshack.us/img142/2483/smokysamqc9.jpg

Arashi666

11-29-2006, 09:25 PM

pbboy37

12-03-2006, 05:10 PM

Im new to these forums but i thought Id share a incident I encountered. I had just started up my car the other day, and I was sitting in my driveway. All of a sudden k band starts going off, I look around in my circle for cops, theres none. I look up and 2 fighter jets are flying by and when they passed the k band went off. So who knows?

chorizo

12-03-2006, 08:06 PM

The radar altimeter used in military aircraft will set off the radar detectors. It is directed below the aircraft and used to indicate the altitude of the A/C above the ground. There is a video of that happening in Spain on youtube. I don't know what detector they are using nor can I tell the band that it alerted on.

I had an older RD that alerted on K band when the F-18's and UH-1N's from Miramar MCAS would pass directly over the car.

http://www.youtube.com/watch?v=IC9mqFiXm7c

raresvx

12-03-2006, 11:50 PM

if you want to track planes try acars

ltilaser

12-04-2006, 02:31 PM

http://www.zaonflight.com/mrx.html
I don't know if it is legal to operate this outside of an aircraft wihout a license. Some units actually transmit and interrogate aircraft while sending out their position. Some units are passive.

Also, im not sure if it still works if it does not receive a base aricraft transponder reading. It may assume your own altitude is zero and will work as if you were at zero altitude, it may not use a base altitude reading and disable alerts but still read out a close aircraft, it may not work at all, or it will do something totally different.

Some systems are altimeter based and may work without a base transponder signal.

You'll also have to consider antenna reception.

jimbonzzz

12-04-2006, 02:33 PM

Hey that's pretty cool...

ltilaser

12-04-2006, 07:22 PM

Jim, if I can make a device which detects signals at 1090mhz it may be able to alert you of close aircraft. On a basic device you can have a rf gain knob and a signal streingth indcator.

On a more advanced device I may be able to get a dsp to sense modulation, which I think is DPSK, I probably can get rid of all the falses.

I'm not an EE, so I'm not sure if I can do it or It is going to take a long time.