AirNav Systems Forum
AirNav RadarBox and RadarBox24.com => AirNav RadarBox and RadarBox24.com Discussion => Topic started by: Southwest on January 20, 2010, 03:52:52 PM
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Have had my RadarBox for just under 2 months and I'm having a blast using it. Had a really knackered old scanner which I've dumped and bought a new one. Thing is, the frequencies of the airways have all but changed.
Can anyone help me find out what they should be. The two I'm particularly interested in are the old Brookmans Park-Poll Hill (used to be 127.425 but heard nothing on this freq) and the East and West frequencies of the airway that runs between Clacton (ish) and Bristol (used to be called Green 1, don't know if it is anymore).
Hope someone can help me. For the record, I live near Biggleswade in Bedfordshire.
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This may assist
http://www.airscene.co.uk/tinc?key=lcQ5Iywa&formname=uk_avi_db (http://www.airscene.co.uk/tinc?key=lcQ5Iywa&formname=uk_avi_db)
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Thanks. Still listing BPK-POL as 127.425 but I have been told that has changed (almost supported by the fact I've heard nowt on that frequency for a couple of days).
Still hoping!
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127.425 is London High Level East (127.430 on 8khz separation) and always goes full blast. My last listen was on Monday. Another fave of mine was 135.05, but nowadays only get the aircraft end, must have changed transmitter sites. Same goes for Dover/Lydd 134.9. In fact now (1710 today, just heard 127.425)
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Thanks DeeJay
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BPK-POL is the N601 Airway. You will want to listen to London Area Control Sector 28, Frequency 127.105 . This is between FL195 and FL295. London Area Control Sector 34 is on 127.880, For Flight Levels 295 and above. For FL195 and below, its London Terminal Control WELIN Sector on 130.925
Any more frequency's, just ask here or visit my website thats in my signature. Hope this helps!
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I use this
http://www.worldaerodata.com/countries/United_Kingdom.php
http://www.planningcharts.de/
scroll down
click on GIF- Datei list
from pat
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Thanks Jonjo and Radarspotter.
Some good maps you have on your site Jonjo, very useful.
I actually heard a few aircraft on 127.425 at lunchtime today, maybe before I was just unlucky.
As always, the help and support from the ANRB site members is brilliant.
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Hi Southwest,
What you were hearing on 127.425 was actually 127.43, on most units the adjacent frequency can be heard.
As a supplement to the great information posted here so far I have attached a few of my own documents that I hope you (& others) find useful. The frequency lists are completely up to date with any recent changes.
The NATS www is excellent too, especially the AIRAC's which detail any changes to airways, reporting points & frequencies as well as excellent airport info on frequencies, SID's, STAR's etc...
http://www.nats-uk.ead-it.com/public/index.php%3Foption=com_content&task=blogcategory&id=1&Itemid=2.html
Cheers,
Dave
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Another great response, thanks dca
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Hi dca
After checking your list with another, there are a few discrepancies.
S1 134.460 other list has freq 132.84 for S1 and 134.6 for S24
S14 118.480 other list says 118.840
S16 134.455 other list S16 showing as 136.600
S27 & S32 other list shows frequencies the other way round, is this important?
It could be that the other list is older but was wondering how current your list was?
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Are not Air frequencies on 25 Khz spacing?
J.
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Most still are but some are 8.33 spacing now.
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Hi dca
After checking your list with another, there are a few discrepancies.
S1 134.460 other list has freq 132.84 for S1 and 134.6 for S24
S14 118.480 other list says 118.840
S16 134.455 other list S16 showing as 136.600
S27 & S32 other list shows frequencies the other way round, is this important?
It could be that the other list is older but was wondering how current your list was?
134.460 replaced 132.84 As far as I'm aware there isn't a S24 currently.
118.48 is S14 Clacton (I have just checked & is active) It replaced 118.475
134.455 replaced 136.6 on S16 It is often 'bandboxed' with 134.460, 132.605 & 127.430
Sectors 27 & 32 are both 'Daventry South' Sector
I'm pretty sure my info is the latest version as I recently reviewed & validated them all. Please feel free to correct any that may not be though!
Cheers,
Dave
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Are not Air frequencies on 25 Khz spacing?
J.
Hi Jeremy,
As new frequencies are are issued most are now 8.33 spacing replacing the traditional 25 Khz
Dave
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Hi,
134.460 is the Sector 24 frequency. it has not replaced 132.840, as this is the Sector 1 Frequency.
118.480 is Sector 14, my site has it listed as 118.840, I'll fix this now.
I will also change Sector 16 as well, as you say it is now 134.455.
Sector 27 & 32 are quite interesting, as they are actually the same airspace. Sector 27 handles London TMA (Excluding Gatwick) Arrivals, Whilst Sector 32 handles all other traffic and Gatwick Arrivals. Sector 27 is on 129.205, whilst Sector 32 is 131.130 . When bandboxed, I'm quite sure there on 129.205
Thanks everyone,
Jonjo
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Actually, I'm quite sure Sector 16 is 136.600. The frequency changed to make way for 134.460 as there too close.
Thanks, Jonjo
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For ground listeners channel 127.430 and freq 127.425 are on the same frequency 127.425.
So are 118.480 and 118.475.
The difference is in the airborne receiver where 8.33s have a narrower filter than 25 kHz freqs.
127.415 (127.41666) and 127.435 (127.43333) would be the adjacent channels in 8.33 kHz spacing.
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Actually, I'm quite sure Sector 16 is 136.600. The frequency changed to make way for 134.460 as there too close.
Thanks, Jonjo
H Jonjo,
- I'm also sure that 134.460 replaced 132.840 (London Upper) although both frequencies operate still. Where do you have S24 covering? (I'm right underneath the 134.46 sector which hands over to 127.43 around the LGW area)
- S16 was 134.45, changed to 134.46
Interesting debate though as there is no definitive list (thats up to date, anyway!) out there. As well as by listening I pick up the changes through the AIRAC cycles on the NATS www.
Cheers,
Dave
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Sorry I should have said S16 was changed from 134.45 to 134.455...
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Hi,
Sector 24 was introduced early last year, which replaces the top half of Sector 1. If you look at the map on my site, imagine Sector 24 as the top half of what is Sector 1 on that map. They are old maps and im currently trying to work out a way of making sector maps myself, as I have the lat/long coordinates of all the sectors however I havent found a way to make up to date maps as yet. Sector 1 is 132.840 and Sector 24 is 134.460 . Because this is part of what was Sector 1, This will be why you thought it had replaced 132.840.
Ovbiously the AIRAC's are a great way to keep track of frequency changes. If I remember correctly, Sector 16's frequency changed to 134.455 late 2008, but changed to 136.600 early 2009 as Sector 24 was being introduced on 134.460, which is only 5KHz away, and they were expecting interference.
The list on my website is updated when the AIRAC's are released, and I try to make it as accurate as possible, However ovbiously this can be quite a hard task. The last frequency change was the introduction of 128.815 as an Area Control Sector as far as I know.
Indeed, An interesting debate!
Jonjo
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Thanks Jonjo,
Great info & A great website!
Dave
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134.455 and 134.460 are 8.33 kHz apart, not 5 kHz.
134.455 = 134.450 MHz
134.460 = 134.458333 MHz
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Even so, En-route frequencies are transmitted at an offset, sometimes as much as 7.5KHz. Depending on the transmitters etc. that could cause interference.
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To DeeJay, 135.05 is supposed to be operational between KATHY and AVANT and then 127.825 from KATHY to ORTAC. From personal experience, they just use 127.825 for the whole sector.
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Brisbane.Thanks for that info, have listened out on 127.825, but only get the aircraft end. Until early 2009, could hear both ends of 135.05, and had done for some years. As mentioned, they must have shifted to another transmitter site.
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Even so, En-route frequencies are transmitted at an offset, sometimes as much as 7.5KHz. Depending on the transmitters etc. that could cause interference.
Used for 25 kHz frequencies only so multiple transmitter sites can be used without interference. 8.33 kHz freqs are always spot on.
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Hi meagain,
thanks for the information. When you say 8.33 kHz are always spot on, does this not cause interference with other transmitters?
Thanks,
Jonjo
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8.33 kHz channels are protected. One transmitter per active freq/sector only. Therefore usage in upper airspace only. If multiple usage than sectors are widely separated, e.g. 133.955 is Maastricht and Madrid,
25 kHz freqs can have multiple transmitters for better low altitude coverage. Freq offset is something like +- 3.5 kHz. No two transmitters on exactly the same freq.
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Hi meagain,
Thanks for explaining that! So, if I understand correctly, London Control 132.860 transmits on 132.8583?
Thanks again,
Jonjo
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Not strictly on topic but I've just seen an iphone app for LIve ATC.
Obviously no good for the UK but listening to Dublin on the net at the moment.
Stuart
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That is correct.
http://www.jeppesen.com/download/briefbull/fra99-f.pdf
The phraseology was changed 2007 that all frequencies are spoken with 6 digits.
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For those early on in the thread that were asking about where Sector 24 is:
http://jonjorobb.netne.net/jonjo/S24.png
Thanks,
Jonjo
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Another good site listing Frequencies is
www.proma.org.uk
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Have had my RadarBox for just under 2 months and I'm having a blast using it. Had a really knackered old scanner which I've dumped and bought a new one. Thing is, the frequencies of the airways have all but changed.
Can anyone help me find out what they should be. The two I'm particularly interested in are the old Brookmans Park-Poll Hill (used to be 127.425 but heard nothing on this freq) and the East and West frequencies of the airway that runs between Clacton (ish) and Bristol (used to be called Green 1, don't know if it is anymore).
Hope someone can help me. For the record, I live near Biggleswade in Bedfordshire.
You want 127.880 for BPK to polehill and the others are 127.43 , 132.6 ,132.840 ,134.460
That should do the job.
Mike
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Thanks Mike
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No problem i listen and watch these airways all the time so i know these freqs are valid. Sometimes 132.165 is used aswell usually when its pretty quiet.
Mike
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If anyone has an Iphone you can download a free app from flightcom uk, it has the frequecies of the airports listed on it. Also quite clever is that if your phone has gps on it it will tell you the closest airport to you. I'm not sure how up to date the listing is but my local airports seem to be ok.
Stuart
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You want 127.880 for BPK to polehill and the others are 127.43 , 132.6 ,132.840 ,134.460
That should do the job.
Mike
[/quote]
132.6 is now 132.605