Aircraft such as gulfstreams are sometimes quite common in doing this. Some people are suggesting its to mask there positions.
Its hard for us to confirm this either way unless someone wants to lease us there Gulfstream for a nice test run?
At the moment we don't believe this to be a RB fault as the position data fault would mean all aircraft are affected as they send the same type and format of data (ADS-B) which is not the case.
We do believe this effect is down to specific aircraft spoofing there position deliberately or a faulty transponder.
Hi,
Here is another diagram I built up over a day or so. I did manage to match up the logs for the larger of those two spikes you see. I am couldn't find anything on the narrower one. I am still not sure whether to believe there could be reception over 290nm out given my overall reception to the west but the information is in the log. It even extends well past any coverage I normally get to the east.
Regards,
Darryl
Hi Falcon, Was That Polar Diagram Taken With A Standard Antenna Or External?
Thanks John
Its not just Gulfstreams giving out spurious position data I have ATP's doing same G-OAAF,G-BTPE and G-BUUP
If none of these are ADS-B why is rb saying they are? I've seen them tracking across the screen in and out of EGNX most evenings.
G-BTPA N12 00.0 E000 00.0 N12 00.0 E000 00.0All British Aerospace ATPs, so maybe it's an aircraft problem rather than a RB problem. Unless other aircraft types are also showing the same problem?
G-BTPA N12 00.0 E000 00.0 N53 57.7 E000 00.0
G-BTPA N78 00.0 E000 00.0 N66 00.0 E000 00.0
G-BTPE N12 00.0 E000 00.0 N12 00.0 E000 00.0
G-BTPE N12 00.8 E000 00.0 N12 00.0 E000 00.0
G-BTPF N12 00.0 E000 00.0 N12 00.0 E000 00.0
G-BTPF N54 00.0 E000 00.0 N12 00.0 E000 00.0
G-BTPF N78 00.0 E000 00.0 N12 00.0 E000 00.0
G-BTPF S42 00.0 E000 00.0 N12 00.0 E000 00.0
G-BUUP N12 00.0 E000 00.0 N24 11.3 E000 00.0
G-BUUP N12 00.0 E000 00.0 N54 00.0 E000 00.0
G-BUUR N12 00.0 E000 00.0 N24 11.3 E000 00.0
G-BUUR N12 00.0 E000 00.0 N54 00.0 E000 00.0
G-BUUR N12 00.0 E000 00.0 N54 00.0 E000 00.0
If none of these are ADS-B why is rb saying they are? I've seen them tracking across the screen in and out of EGNX most evenings.
Well I'm prepared to be convinced by a radar screenshot :-)
Are you sure you aren't confusing those aircraft with some of the other ATPs like G-MANH and the former G-MANP, which do have ADS-B ?
I have been through Mylog and these are all aircraft with position data outside of my maximum polar range. By type.
ATP LX-WAL,SE-MAP + those already quoted
C650 D-CMPI
CL60 HB-IVS,XA-JVL
H25B VP-CLU below is a gif as this has spurious height info also
GLF5 00-0128,00-0129,01-0076,97-0401,99-0402,N522EE,N508P,N526EE,N531AF,N596GA,
N673P,N740SS,VP-BNL,VP-CES
FA10 F-GPGL
Its hard for us to confirm this either way unless someone wants to lease us there Gulfstream for a nice test run?
I have experienced gulfs transmitting the wrong positions in my area with the SBS, haven’t seen it yet with the RB as I think they have fix them. I do think it would be very dangerous not to mention illegal to transmit false positions.
So if position is NOT required is an invalid position illegal??
G-BTPH on Network now over Burkina Faso? And in Formation with SE-MAP
So if position is NOT required is an invalid position illegal??Yes it is, for example, when flying above the North Sea within the Amsterdam flight information region. From the end of this month, all aircraft flying below 3,000ft must provide accurate position information.