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Forum: ATC Issues

23rd Jan 2015, 20:32

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

Dont Hang Up thanks. I understand that you...

Dont Hang Up thanks.

I understand that you accept the possibility of track swapping but not that of track dropping. Being new to radar technology I'm still struggling with the technical literature...

Forum: ATC Issues

22nd Jan 2015, 21:32

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

Dont Hang Up, I hesitated for a long time...

Dont Hang Up,

I hesitated for a long time whether to post the provocative paragraph you are citing. It sounds not only fanciful but crazy.

However please note that the EASA document cited in...

Forum: ATC Issues

21st Jan 2015, 19:57

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

m99 thanks, Yes, ADS-B, the younger brother...

m99 thanks,

Yes, ADS-B, the younger brother of Mode-S SSR, is a security threat:

http://www.icao.int/APAC/Documents/edocs/CNSdocs/01gd_security_adsb.pdf

By the way, satellite data links may...

Forum: ATC Issues

21st Jan 2015, 01:53

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

RaRadar thanks, The European Mode S Station...

RaRadar thanks,

The European Mode S Station Functional Specification is a very interesting document. Since it preceded the AeroThai document by about 7 years the Thais were probably aware of it.
...

Forum: ATC Issues

19th Jan 2015, 22:57

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

Are there mode-S radars immune to ID duplication effects?

It seems there are mode-S radars immune to ID duplication effects. In the technical specifications of a national Thai tender for six sites (2012) the following requirements were stated:

1.1.1.26. ...

Forum: ATC Issues

10th Jan 2015, 14:02

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

ID duplication is a real ATC problem?

It seems ICAO 24-bit Aircraft Addresses duplication may be a practical ATC problem in Europe. Major Donald L. McCallie (USAF) says in:

http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ada545599...

Forum: ATC Issues

22nd Nov 2014, 20:52

Replies: 5

Extracting tracks of individual planes from recorded radar data

Views: 3,534

Posted By Ron Black

A possible clarification

I think the post opening this thread needs some clarification.

The MH370 saga was discussed a lot yet somehow the new published radar track and the mysterious "Sharp Corner" in it got little...

Forum: ATC Issues

10th Nov 2014, 19:46

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

I'm very grateful for the extraordinary comments...

I'm very grateful for the extraordinary comments to my questions! They provide excellent background on this subject and make it possible to guess how the system works and the ID duplication effects...

Forum: ATC Issues

10th Nov 2014, 09:27

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

HEATHROW DIRECTOR thanks a lot! I'm...

HEATHROW DIRECTOR thanks a lot!

I'm having more questions regarding ADS-C in this situation:

Is ADS-C data displayed with the same equipment as SSR?
Is ADS-C surveillance aware of squawk...

Forum: ATC Issues

10th Nov 2014, 08:58

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

DaveReidUK thanks a lot! The EASA document...

DaveReidUK thanks a lot!

The EASA document explains it this way:

"Any incorrect aircraft address is, potentially, a duplicate address, because it has not been legitimately assigned to that...

Forum: ATC Issues

9th Nov 2014, 23:14

Replies: 24

Duplicate ICAO 24-bit aircraft addresses and SSR

Views: 18,661

Posted By Ron Black

Duplicate ICAO 24-bit aircraft addresses and SSR

I have a silly radar question.

According to the European Aviation Safety Agency (EASA) when two (or more) aircraft with the same (duplicate) ICAO 24-bit aircraft address are operating within range...

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