AirNav Systems Forum
AirNav RadarBox and RadarBox24.com => AirNav RadarBox and RadarBox24.com Discussion => Topic started by: LiveATC on July 06, 2010, 04:50:09 PM
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I do not see squawk Moscow FIR
Version 3.13 Windows XP
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Hi, try putting your curser on the edge and pulling to the right to make the view larger, squak and company should then show.
Good luck, Dave.
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I think he means nothing is displaying in the squawk column
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The squawk can only be detected on Radarbox if there is a Mode S radar in your vicinity. See http://www.kinetic-avionics.co.uk/forums/viewtopic.php?f=5&t=4420&p=29694&hilit=squawk#p29694 for a possible explanation.
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The squawk can only be detected on Radarbox if there is a Mode S radar in your vicinity. See http://www.kinetic-avionics.co.uk/forums/viewtopic.php?f=5&t=4420&p=29694&hilit=squawk#p29694 for a possible explanation.
That sounds a more plausible theory than the squawk column simply not being visible :-)
Another clue would be no altitude information for non-ADS-B aircraft, as otherwise that will only show in response to an interrogation. Incidentally the interrogating Mode S radar doesn't need to be that close to you - it's whether you're picking up aircraft that are within range of the radar that's the issue.
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Another clue would be no altitude information for non-ADS-B aircraft, as otherwise that will only show in response to an interrogation.
My guess is that there's no ModeS radar groundstation in the vicinity, AND the altitude readouts are in response to TCAS replies with ID & altitude information.
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AND the altitude readouts are in response to TCAS replies with ID & altitude information.
I didn't think either RadarBox or SBS-1 decoded TCAS replies (DF0/DF16). Not sure about Aurora.
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I didn't think either RadarBox or SBS-1 decoded TCAS replies (DF0/DF16).
I don't know for sure, but running Airnav's testmodes.exe utility (http://www.flickr.com/photos/tarbat/4773392699/sizes/o/), I see the following DF's - 0, 4, 5, 11, 17, 20, 21.
The DF0's just have altitude:
$PTA,400CEB,,28775,,,,,,,A,,0,,,
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Airnavs testmodes.exe utility
hello
Where do you get this from?
Andrew
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Where do you get this from?
If I told you I'd have to kill you............... I'm under strict instructions not to pass it on, it was used during development of DF20/DF21 decoding for non-ADS/B FlightIDs.
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If I told you I'd have to kill you............... I'm under strict instructions not to pass it on, it was used during development of DF20/DF21 decoding for non-ADS/B FlightIDs.
Interesting, I think I've seen references to this before. Though if DF0 TCAS surveillance responses were being decoded by RadarBox itself, then I would imagine that our Moscow correspondent would be seeing lots of non-ADS-B aircraft with altitudes.
Perhaps he'll come back and tell us if that's the case.
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Though if DF0 TCAS surveillance responses were being decoded by RadarBox itself, then I would imagine that our Moscow correspondent would be seeing lots of non-ADS-B aircraft with altitudes.
The Moscow screenshot in the first post would suggest that. All the non-ADS-B aircraft in the screenshot have altitudes, but no squawks.
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The Moscow screenshot in the first post would suggest that. All the non-ADS-B aircraft in the screenshot have altitudes, but no squawks.
Doh ! Should have looked at that !
Just think - this means that AirNav have been keeping quiet all this time about something that RadarBox can do but SBS-1 can't :-)
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Just think - this means that AirNav have been keeping quiet all this time about something that RadarBox can do but SBS-1 can't :-)
I must admit I didn't realise the SBS-1 couldn't decode DF0 TCAS replies. That's quite a large chunk of data it misses then - accounts for 16% of messages in my area.
DF0 16%
DF4 13%
DF5 4%
DF11 20%
DF17 15%
DF20 22%
DF21 10%
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I must admit I didn't realise the SBS-1 couldn't decode DF0 TCAS replies. That's quite a large chunk of data it misses then - accounts for 16% of messages in my area.
I expect that ability will feature prominently in the next editions of the RadarBox brochure and competitive comparison :-)
If only to divert attention away from the routes issue ...
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Where do you get this from?
Your inbox is full. If you're really brave, you could use Boris' RB Y-Adaptor to snoop on the USB data, but you'll need to write a program to read the UDP output and decode the data stream. It's beyond my programming skills!!
And there's always MeterLite - see http://www.airnavsystems.com/forum/index.php?topic=3639.0
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Hello
Not again :-( I will empty it .
Looked at the Y adapter but thought it was too complicated for what I want since it is only for my personal enjoyment and not for a real purpose. MeterLite only looks at port 30003 so that wont give me the detail on the actual messages received or will it.
Thank you
Andrew
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AirNav - does a received/decoded DF0 packet produce a corresponding message in the Port 30003 socket output ? And if so, what is the format ?
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does a received/decoded DF0 packet produce a corresponding message in the Port 30003 socket output ?
I don't think so.
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does a received/decoded DF0 packet produce a corresponding message in the Port 30003 socket output ?
I don't think so.
That's a shame. Probably best not to put it in the brochure after all, then.
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That's a shame. Probably best not to put it in the brochure after all, then.
If it's used to display the altitude of non-ADS-B aircraft in the Radarbox program, who cares whether it's output on port 30003? I can't imagine there are any addons that use port 30003 that would do anything with a DF0 message anyway.
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If it's used to display the altitude of non-ADS-B aircraft in the Radarbox program, who cares whether it's output on port 30003? I can't imagine there are any addons that use port 30003 that would do anything with a DF0 message anyway.
I disagree.
A DF0 is essentially the same as a DF5 (24-bit address and altitude) except that it doesn't need an interrogation from a Mode S radar, just another TCAS-equipped aircraft in the vicinity.
And I can certainly think of one application that could make use of DF0-based message, it's been running here 24/7 for the last 4 years ...
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Thanks for an informative topic. TCAS is compulsory here so I now understand why I am getting altitude from the aircraft even though there is no Mode S radar
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does a received/decoded DF0 packet produce a corresponding message in the Port 30003 socket output ?
Testing this morning suggests that a received/decoded DF0 packet produces a corresponding MSG5 in the Port 30003 socket output - bit I can't be sure. Only way to prove that for certain is to test in an area without a Mode S ground station.
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Only way to prove that for certain is to test in an area without a Mode S ground station.
Or of course we could simply ask AirNav :-)
Oh hang on, we have already ...
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Dev will get back to you regarding this.
If its getting decoded in the Test App then RadarBox can decode it but whether its being passed through towards the port data is a different matter.
During the software change to include Mode-S data a few years ago we did try and gather as much decoded information as possible, some of it is not helpfull to us and is not passed through.
Dev should be able to clarify later what is being decoded and being passed through.
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Back to the original question. Why don't I see a squawk. I thought I was not seeing a squawk as there is no mode S radar in the area. I have just started uploading to http://www.radarvirtuel.com/ and imagine my surprise when I see the aircraft squawk on the map from information I am sending while my radarbox still shows no squawk.
Any ideas?
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Squawk is sent out by the aircraft when interrogated by a Mode-S Radar site. There is no Radar site around area hence your not getting Squawks.
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Then how did my computer upload the squawk code to radarvirtuel. Maybe the local radar is mode S
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Sorry we missed that part, can you show us a sceenshot of your MyFlights showing the squawk empty and the what radarvirtuel is showing?