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scbriml
Posts: 13477
Joined: Wed Jul 02, 2003 10:37 pm

Frequencies For Airband Scanner

Tue Nov 09, 2004 1:12 am

Is there a website that lists frequencies used by approach and tower for airports? Especially interested in UK, but international airports would be good as well.

Many thanks!
Time flies like an arrow. Fruit flies like a banana!
 
SPREE34
Posts: 1567
Joined: Tue Jun 29, 2004 6:09 am

RE: Frequencies For Airband Scanner

Tue Nov 09, 2004 1:31 am

Too many sites to mention, or remember. Do a search on phrases like, aeroband,airband aviation freqs, air freqs, air traffic control freqs, etc etc etc.

Ther are some good ones, and some so so.
I don't understand everything I don't know about this.
 
Scottiedog
Posts: 146
Joined: Mon Nov 08, 2004 10:11 pm

RE: Frequencies For Airband Scanner

Tue Nov 09, 2004 1:55 am

Give us a clue as to the area the you are in - or want to listen to, then I'm sure you will receive more detailed information.

Remember that air band uses VHF for domestic flights (Shortwave if over the Atlantic or other in accessible places), so signals are based on line-of-sight (basically). If you want London frequencies then there is no point in my providing those for Manchester. Also do you want airfield or airways?
 
Londoncenter
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Joined: Fri Feb 20, 2004 8:53 pm

RE: Frequencies For Airband Scanner

Tue Nov 09, 2004 5:11 am

I see on your profile you are in woking, if that is the case then you may well be able to get good quality reception from london middle and upper sectors from the en-route side of things. Frequencies are LMS - 132.45 & 132.6 (often bandboxed together when quieter) and LUS - 135.425 & 127.425 (again often together)
 
Santhosh
Posts: 543
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RE: Frequencies For Airband Scanner

Tue Nov 09, 2004 5:39 am

Londoncenter Sir since you are an Air Traffic Controller, I would like to ask you a doubt. What is that difference between Primary radar and Secondary Radar? And what is its functional difference and also what is its relation with Different modes of Transponder.

Thankfully,
George
Happy Landings :)
 
meister808
Posts: 924
Joined: Sat Jan 01, 2000 11:45 am

RE: Frequencies For Airband Scanner

Tue Nov 09, 2004 5:52 am

Primary radar is the basic physical piece of equipment that you always see in movies and such, with a radar antenna sweeping and showing dots on a screen where there are radar targets.

What secondary radar does is it adds information from the transponder and corresponding data tag, such as altitude, vertical speed, identifier, aircraft type, etc.

So, obviously, the amount of data shown on a secondary radar depends on what mode the transponder is set to. If it isn't reporting altitude(Mode-C), then that won't show on the tag. What Mode-S transponders allow is for the transponder to recieve all the data from the secondary radar, thus allowing this data to be displayed in the aircraft. This is the basis of Traffic Information Service(TIS).

I hope that helps.

-Meister
Twin Cessna 812 Victor, Minneapolis Center, we observe your operation in the immediate vicinity of extreme precipitation
 
stlgph
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RE: Frequencies For Airband Scanner

Tue Nov 09, 2004 7:49 am

Wait a second...I'm still rather new at this but it sounds like you can go to certain websites and listen to air traffic controls? Is this correct? If so, -where- *where*?!! Haha. And I'd be interested in STL and surrounding areas/airports, btw. Thanks.
if assumptions could fly, airliners.net would be the world's busiest airport
 
Londoncenter
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Joined: Fri Feb 20, 2004 8:53 pm

RE: Frequencies For Airband Scanner

Tue Nov 09, 2004 8:30 pm

Primary radar sends out a strong signal from the ground which is bounced back off the aircraft and received by the same equipment on the ground which then derives the position of the a/c and is displayed on a radar screen. Whether as a raw return (i.e. like the movies with the sweeping glow and fading) or as a synthesized picture (a little cross or box or other symbol representing the raw return on a digital picture).

Secondary radar sends out a weaker signal as it only needs to be received by the aircraft, not reflected back. The transponder onboard the a/c is interrogated by this signal and then sends back a reply which is received by the ground based equipment. As Meister poinst out this can be mode A which is callsign data, allowing for easier ID than primary alone, or (as most a/c do) can have mode C also which gives a height readout from the a/c altimeter. This allows ATC to separate a/c easier as they can see levels of a/c without asking for reports.

Mode S is the next big development and will allow every a/c in the world to have a discrete secondary radar ID, instead of an allocated four digit transponder squawk. And will allow ATC to see almost all information that may be required, such as climb rates, indicated air speed, even the level the pilot has set on autopilot, allowing us to check if the pilot has entered the correct level after his clearance. You would not believe the number of 'Level busts' because pilots get levels and headings mixed up, even after reading instructions back correctly. Pilots have a lot of numbers to think about and look at in front of them so I imagine its easily done.
 
LX23
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RE: Frequencies For Airband Scanner

Tue Nov 09, 2004 10:03 pm

Londoncenter:

Any freqs you can give us on the SOU area? Big grin
 
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scbriml
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RE: Frequencies For Airband Scanner

Wed Nov 10, 2004 12:32 am

Thanks for the responses. As one detective worked out, I am based in Woking, so my primary interest is LHR & LGW, but I travel frequently so I was interested to know if there was a website where I could look up frequencies before I travel.
Time flies like an arrow. Fruit flies like a banana!
 
fsuwxman
Posts: 435
Joined: Wed Jan 02, 2002 3:57 pm

RE: Frequencies For Airband Scanner

Wed Nov 10, 2004 1:06 am

Well, if your travels bring you to the US, you can always use Go to the Airport look up, and will give you all the frequencies for that airport, except CTR frequency, which, if you do a Google Search, can be found with their repeater location.
ASOS... Another Shi#y Observation Station