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Mode S transponder display to ATC?



 
 
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  #1  
Old September 4th 08, 09:25 PM posted to rec.aviation.ifr
Paul kgyy
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Posts: 283
Default Mode S transponder display to ATC?

Is it normal practice for a Mode S transponder to display the aircraft
tail number to ATC?

I ask because I thought it did, but recently on flight following the
controller seemed to have difficulty getting my number correct over
the radio.
  #2  
Old September 4th 08, 10:06 PM posted to rec.aviation.ifr
Steven P. McNicoll[_2_]
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Posts: 721
Default Mode S transponder display to ATC?

paul kgyy wrote:

Is it normal practice for a Mode S transponder to display the aircraft
tail number to ATC?



No.


  #3  
Old September 4th 08, 10:28 PM posted to rec.aviation.ifr
Mike[_22_]
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Posts: 466
Default Mode S transponder display to ATC?

"Steven P. McNicoll" wrote in message
m...
paul kgyy wrote:

Is it normal practice for a Mode S transponder to display the aircraft
tail number to ATC?



No.


It isn't displayed to controllers, but a ModeS transponder does transmit its
serial number which can be read using tools not available to the controller.
The serial number does translate to the N number so long as the transponder
is correctly registered. As of now this technology hasn't been implemented
to the controller, nor is the serial number recorded in the continuous data
recording archive.

  #4  
Old September 4th 08, 11:51 PM posted to rec.aviation.ifr
Peter Clark
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Posts: 538
Default Mode S transponder display to ATC?

On Thu, 04 Sep 2008 21:28:24 GMT, "Mike" wrote:

"Steven P. McNicoll" wrote in message
om...
paul kgyy wrote:

Is it normal practice for a Mode S transponder to display the aircraft
tail number to ATC?



No.


It isn't displayed to controllers, but a ModeS transponder does transmit its
serial number which can be read using tools not available to the controller.
The serial number does translate to the N number so long as the transponder
is correctly registered. As of now this technology hasn't been implemented
to the controller, nor is the serial number recorded in the continuous data
recording archive.


Doesn't the system process the flightid field? Or isn't that
transmitted?
  #5  
Old September 5th 08, 01:41 AM posted to rec.aviation.ifr
Mike[_22_]
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Posts: 466
Default Mode S transponder display to ATC?

"Peter Clark" wrote in message
...
On Thu, 04 Sep 2008 21:28:24 GMT, "Mike" wrote:

"Steven P. McNicoll" wrote in message
news:TMOdnSYGZc1D0F3VnZ2dnUVZ_gadnZ2d@earthlink. com...
paul kgyy wrote:

Is it normal practice for a Mode S transponder to display the aircraft
tail number to ATC?



No.


It isn't displayed to controllers, but a ModeS transponder does transmit
its
serial number which can be read using tools not available to the
controller.
The serial number does translate to the N number so long as the
transponder
is correctly registered. As of now this technology hasn't been
implemented
to the controller, nor is the serial number recorded in the continuous
data
recording archive.


Doesn't the system process the flightid field? Or isn't that
transmitted?


I'm not sure what "system" or "field" you're referring. The computers at
the centers and tracons have no idea if the transponder is ModeS or not.
They only process the beacon code and display the ACID that's in the flight
plan.

  #6  
Old September 5th 08, 02:15 AM posted to rec.aviation.ifr
Bob Noel
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Posts: 1,374
Default Mode S transponder display to ATC?

In article Pe%vk.431$Dj1.271@trnddc02, "Mike" wrote:

I'm not sure what "system" or "field" you're referring. The computers at
the centers and tracons have no idea if the transponder is ModeS or not.
They only process the beacon code and display the ACID that's in the flight
plan.


The centers and tracons don't have Mode S radars yet?

--
Bob Noel
(goodness, please trim replies!!!)

  #7  
Old September 5th 08, 02:52 AM posted to rec.aviation.ifr
Jay Maynard
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Posts: 521
Default Mode S transponder display to ATC?

On 2008-09-05, Bob Noel wrote:
In article Pe%vk.431$Dj1.271@trnddc02, "Mike" wrote:
I'm not sure what "system" or "field" you're referring. The computers at
the centers and tracons have no idea if the transponder is ModeS or not.
They only process the beacon code and display the ACID that's in the flight
plan.

The centers and tracons don't have Mode S radars yet?


Some do, some don't. The problem is not the radar or the computer behind it,
bu the computer driving the displays that the controllers see: they don't
get the mode S data.
--
Jay Maynard, K5ZC http://www.conmicro.com
http://jmaynard.livejournal.com http://www.tronguy.net
Fairmont, MN (FRM) (Yes, that's me!)
AMD Zodiac CH601XLi N55ZC
  #8  
Old September 5th 08, 08:53 AM posted to rec.aviation.ifr
Thomas Borchert
external usenet poster
 
Posts: 1,749
Default Mode S transponder display to ATC?

Peter,

Doesn't the system process the flightid field?


Some do. In Europe, more and more do.

Or isn't that
transmitted?


It certainly is.

--
Thomas Borchert (EDDH)

  #9  
Old September 5th 08, 08:53 AM posted to rec.aviation.ifr
Thomas Borchert
external usenet poster
 
Posts: 1,749
Default Mode S transponder display to ATC?

Paul,

Is it normal practice for a Mode S transponder to display the aircraft
tail number to ATC?


Mode S transponder have the option of setting a flight ID or the tail
number in a data field designated for that info. This is broadcast with
the Mode S data packet and is independent of the unique transponder hex
code. In airline operations, the flight crew normally sets the flight ID
for each flight, e.g. UA011 for United flight 011. In GA operations, the
aircraft tailnumber is set by the installer.

Controllers with mode S radar equipment have the option of displaying
this data field next to the "blip". I do not know how common such
equipment is in the US, but it is getting more and more widespread in
Europe.

In central Europe, where Mode S recently became mandatory, ATC does not
yet rely on that data field for aircraft identification, however. They
say the percentage of erroneous (sp?) entries in that data field is so
high that it can't be relied upon. Thus, when I do an IFR pickup, I
still get a squawk and are radar identified by that squawk, even though
the controller would be able to see my call sign directly on his screen.
In fact, the controller DOES see it on his screen, which I have verified
by asking them.

AFAIK, the big database correlating call signs and hex codes inside the
radar equipment is a myth.

--
Thomas Borchert (EDDH)

  #10  
Old September 5th 08, 01:28 PM posted to rec.aviation.ifr
Mike[_22_]
external usenet poster
 
Posts: 466
Default Mode S transponder display to ATC?

"Bob Noel" wrote in message
...
In article Pe%vk.431$Dj1.271@trnddc02, "Mike"
wrote:

I'm not sure what "system" or "field" you're referring. The computers at
the centers and tracons have no idea if the transponder is ModeS or not.
They only process the beacon code and display the ACID that's in the
flight
plan.


The centers and tracons don't have Mode S radars yet?


The centers never have and never will other than a few terminal radars which
are piped into the centers for low level coverage in some areas. The ModeS
systems themselves are located all over the US, but there's no datalink
capability between the sensor and the automation system. So the only thing
forwarded to the TRACON from the transponder is the 4 digit octal beacon
code and the 3 digit altitude.

 




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