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Hei
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Boeing field ? Hex TE ?
- Thread starter scanhorse
- Start date
Re: Boeing field ? Hex TE ? LN-MOW ???
Possibly TIS-B messages? (whats that ?)
By Anmer at FR24
http://forum.flightradar24.com/thre...zle-for-you-all-TE0xxx-as-HEX?p=8487#post8487
Possibly TIS-B messages? (whats that ?)
By Anmer at FR24
http://forum.flightradar24.com/thre...zle-for-you-all-TE0xxx-as-HEX?p=8487#post8487
Superhai
ScanFlyer Rusty
Re: Boeing field ? Hex TE ? LN-MOW ???
Nå vil vel det sendes TIS-B meldinger for å dekke alle fly i området til radaren som ikke støtter ADS-B. Så det er jo en mulighet. Den kan også sende "anonyme" ICAO24 koder, så selv om transponderen sender en hex code så sender TIS-B radaren kanskje ut en annen. Men dette er mer spekulering fra min side.
Nå vil vel det sendes TIS-B meldinger for å dekke alle fly i området til radaren som ikke støtter ADS-B. Så det er jo en mulighet. Den kan også sende "anonyme" ICAO24 koder, så selv om transponderen sender en hex code så sender TIS-B radaren kanskje ut en annen. Men dette er mer spekulering fra min side.
Re: Boeing field ? Hex TE ? LN-MOW ???
This thread is located at:
http://forum.flightradar24.com/threads/2076-Here-is-a-puzzle-for-you-all-TE0xxx-as-HEX?goto=newpost
Here is the message that has just been posted:
***************
Hi,
Ive also seen this several times.
some ideas about it:
1. seems to happen at KPDX only
2. if a hex with "TE0" is visible, there are more than one at the same time until most of them vanish at the same time
3. hex T is not a valid hex value. it cannot be created (programmed) as hex code in the transponder (the transponder is bit orientated).
4. I have seen it at FR24 only. So it might be connected to the upload or the uploader
possible explaination:
1. a new software is tested, converting the received data to wrong ascii characters or bug in an excisting supported software (it happens only to hex "TE0")
2. wrong CRC correction.
3. wrong field splitting
4. misinterpreted message types.
Would be nice to solve this puzzle.
Karl
***************
This thread is located at:
http://forum.flightradar24.com/threads/2076-Here-is-a-puzzle-for-you-all-TE0xxx-as-HEX?goto=newpost
Here is the message that has just been posted:
***************
Hi,
Ive also seen this several times.
some ideas about it:
1. seems to happen at KPDX only
2. if a hex with "TE0" is visible, there are more than one at the same time until most of them vanish at the same time
3. hex T is not a valid hex value. it cannot be created (programmed) as hex code in the transponder (the transponder is bit orientated).
4. I have seen it at FR24 only. So it might be connected to the upload or the uploader
possible explaination:
1. a new software is tested, converting the received data to wrong ascii characters or bug in an excisting supported software (it happens only to hex "TE0")
2. wrong CRC correction.
3. wrong field splitting
4. misinterpreted message types.
Would be nice to solve this puzzle.
Karl
***************
Re: Boeing field ? Hex TE ? LN-MOW ???
Here is the message that has just been posted:
***************
to make it a bit more clear (had a look into the documentation again):
the ModeS/ADS-B/TIS-B is setup as follows:
1) Preamble: used for syncronizing
2) 8-bit controll field:
contains the 5-bit DF-message type (for example DF11 acq squitter, 17 ADS-B, 18 TIS-B,19 military)
plus the 3-bit subtype (CA)
3) 24-bit field contains the aircraft address (ICAO24/Hex)
4) this is then followed by 24-bit parity check (CRC)
in the extended squitter there is an additional field between the aircraft address and the parity check. Its 56-bits long and contains the ADS message content.
the maximum what can be coded in the 24-bit aircraft address field is 111111111111111111111111 equals hex FFFFFF.
would be nice if the uploader KPDX could provide us with a raw data dump of the messages received.
Also to find planes with the hexcode TE0xxx replaced by AE0xxx.
***************
Here is the message that has just been posted:
***************
to make it a bit more clear (had a look into the documentation again):
the ModeS/ADS-B/TIS-B is setup as follows:
1) Preamble: used for syncronizing
2) 8-bit controll field:
contains the 5-bit DF-message type (for example DF11 acq squitter, 17 ADS-B, 18 TIS-B,19 military)
plus the 3-bit subtype (CA)
3) 24-bit field contains the aircraft address (ICAO24/Hex)
4) this is then followed by 24-bit parity check (CRC)
in the extended squitter there is an additional field between the aircraft address and the parity check. Its 56-bits long and contains the ADS message content.
the maximum what can be coded in the 24-bit aircraft address field is 111111111111111111111111 equals hex FFFFFF.
would be nice if the uploader KPDX could provide us with a raw data dump of the messages received.
Also to find planes with the hexcode TE0xxx replaced by AE0xxx.
***************
