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Search: Posts Made By: RaRadar
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Forum: ATC Issues
5th Nov 2015, 22:34
Replies: 3
Views: 2,752
Posted By RaRadar

There are also some things you can do about the...

There are also some things you can do about the effect of windfarms:-

The X Factor: X Band radar and wind farm mitigation - NATS Blog...
Forum: ATC Issues
20th Jan 2015, 21:51
Replies: 24
Views: 18,597
Posted By RaRadar

RB The same requirement has been present in...

RB

The same requirement has been present in the Eurocontrol Mode S Functional Specification since the first issue (1996)
...
Forum: ATC Issues
11th Nov 2014, 19:43
Replies: 24
Views: 18,597
Posted By RaRadar

As DHU says Mode S Interrogators allow for the...

As DHU says Mode S Interrogators allow for the fact that two (or more) aircraft may have the same 24 bit ICAO address, it was quite common in the early days, not so now. Problems only arise when...
Forum: ATC Issues
14th Jun 2014, 11:37
Replies: 19
Views: 6,673
Posted By RaRadar

ADS-B works on 1090 MHz for the downlink whereas...

ADS-B works on 1090 MHz for the downlink whereas the secondary radars use 1030 MHz for the uplink and also 1090 MHz for the downlink. If the 'interference' was on 1030 MHz the secondary radars...
Forum: Rumours & News
23rd Mar 2014, 13:30
Replies: 11,831
Views: 24,214,410
Posted By RaRadar

Why would the transponder be switched off if it...

Why would the transponder be switched off if it wasn't unlawful interference. Just a thought but I have seen aircraft switch to standby, change the code and then re-enable the transponder. This is...
Forum: ATC Issues
25th May 2013, 17:09
Replies: 10
Views: 2,600
Posted By RaRadar

As eglnyt says it could well be the old Narco...

As eglnyt says it could well be the old Narco transponder not behaving. There have been problems with them in the past. It would be interesting to know what your Mode A squawk was at the time to see...
Forum: ATC Issues
6th Aug 2012, 21:52
Replies: 4
Views: 1,462
Posted By RaRadar

I was involved with the CAAFU flight trial of...

I was involved with the CAAFU flight trial of said radar but I don't remember this one. It was around that time though, now where did I put my logbook!

RR
Forum: ATC Issues
11th Sep 2010, 01:20
Replies: 9
Views: 1,584
Posted By RaRadar

An aircraft transponder when not providing...

An aircraft transponder when not providing altitude (not switched to ALT) will still reply to the Mode C interrogation but just not include any data (F1/F2 bracket pairs only). I assume a ships...
Forum: ATC Issues
10th Dec 2008, 21:36
Replies: 7
Views: 1,707
Posted By RaRadar

From the NATS website: "National Air Traffic...

From the NATS website:

"National Air Traffic Services' ambitious :rolleyes: £127 million programme to replace its entire UK radar network by 2012."

RR
Forum: ATC Issues
21st Jul 2006, 21:23
Replies: 8
Views: 1,996
Posted By RaRadar

DaveA I can't locate the UK link about ATC...

DaveA
I can't locate the UK link about ATC history at the moment but here are a couple to be going on with:-
http://mit.edu/6.933/www/Fall2000/mode-s/background.html...
Forum: Tech Log
6th Mar 2006, 21:22
Replies: 9
Views: 1,389
Posted By RaRadar

Try here: ...

Try here:
http://www.eurocontrol.int/cascade/public/subsite_homepage/homepage.html
lots of links to what's happening in Europe and US.
RR
Forum: ATC Issues
25th Mar 2005, 20:05
Replies: 7
Views: 1,416
Posted By RaRadar

Any Mode S ATC radars around the airport will...

Any Mode S ATC radars around the airport will still track Mode S targets on the ground. If you leave ALT selected it allows the radar (or any display system) to discard the data if it is not wanted. ...
Forum: ATC Issues
25th Oct 2004, 23:13
Replies: 5
Views: 1,379
Posted By RaRadar

I don't know about the navaids, but they're...

I don't know about the navaids, but they're certainly still buying plenty of radars. The only authority actively pushing ahead with ADS-B is AirServices Australia.

RR
Forum: Tech Log
1st Jul 2004, 20:03
Replies: 19
Views: 12,565
Posted By RaRadar

The problem, as more Mode S Interrogators get...

The problem, as more Mode S Interrogators get installed around airports, is weeding out the aircraft with faulty squat switches or problems with the installation. For example, many still respond to...
Forum: ATC Issues
10th Jun 2004, 21:26
Replies: 17
Views: 1,771
Posted By RaRadar

Agree with all of above, nobody is currently...

Agree with all of above, nobody is currently using the additional information that can be provided by the new Mode S radars.

BUT

Because of the selective addressing, the problem of garble (eg....
Forum: Tech Log
1st Apr 2004, 20:11
Replies: 5
Views: 1,520
Posted By RaRadar

Bookworm You're correct, when Mode S started...

Bookworm

You're correct, when Mode S started out (at the start of the 70's!) one of the concepts was to replace conventional SSR with selective interrogations. However, there are a number of...
Forum: Tech Log
4th Nov 2003, 07:01
Replies: 5
Views: 1,257
Posted By RaRadar

A fair question Bids! As far as the Mode S...

A fair question Bids!

As far as the Mode S ground station is concerned, it transmits a background All Call interrogation at regular intervals. Any Mode S equipped aircraft flying into coverage...
Forum: Tech Log
1st Nov 2003, 07:07
Replies: 5
Views: 1,257
Posted By RaRadar

The FAA and Eurocontrol web sites are good...

The FAA and Eurocontrol web sites are good sources for information about Mode S.

The Mode S address is 24 bits long which means there are over 16 million possible values, enough to perminently...
Forum: ATC Issues
18th Jul 2003, 07:07
Replies: 15
Views: 1,972
Posted By RaRadar

OK heres the list of currently installed Mode S...

OK heres the list of currently installed Mode S radars:

In the US all airports with an ASR-9 radar are Mode S (around 100+). Their en-route sites are also now being updated.

In the UK - none,...
Forum: Tech Log
14th Jul 2003, 06:45
Replies: 2
Views: 2,014
Posted By RaRadar

Not sure if I qualify as a guru but this is the...

Not sure if I qualify as a guru but this is the info you want!

There are two types of Mode S Intermode All Call:

Mode A/C Only All Call (short 0.8us P4)
A Mode S transponder will NOT reply...
Forum: ATC Issues
27th Nov 2002, 23:00
Replies: 33
Views: 3,389
Posted By RaRadar

The way it is intended to work (at least in...

The way it is intended to work (at least in Europe) is that the Mode S ground station extracts the Aircraft Id (Flight Id) directly via the Mode S datalink. This means that there is no need for a...
Forum: ATC Issues
18th Jul 2002, 22:18
Replies: 18
Views: 3,248
Posted By RaRadar

CPB There are three different flavours of...

CPB

There are three different flavours of Mode S All Call:
1. Mode S Only All Call - Mode S transponders reply, A/C do not (normally use this one)
2. Mode A/C Only All Call - Mode S transponders...
Forum: ATC Issues
18th Jul 2002, 01:01
Replies: 18
Views: 3,248
Posted By RaRadar

CPB - Good Post, just to clarify a couple of...

CPB - Good Post, just to clarify a couple of points.

At present TCAS and Mode S ground stations operate completely independently. A ground station would see TCAS squitter or air to air...
Forum: Rumours & News
9th Jul 2002, 21:24
Replies: 677
Views: 206,268
Posted By RaRadar

Avman, Standard Departure It is aready a...

Avman, Standard Departure

It is aready a feature of the Mode S transponder to initate a downlink message that contains the RA. The new Mode S radars that are starting to be installed in Europe...
Forum: ATC Issues
2nd May 2002, 00:35
Replies: 13
Views: 2,579
Posted By RaRadar

I'm involved with installing the new Mode S...

I'm involved with installing the new Mode S radars, terminal and en-route not multi-lateration, and we can now see aircraft moving around the airport on Mode S. Unfortunately some aircraft do not...
Showing results 1 to 25 of 25


 
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