I dont see any planes !

Are you having trouble getting Virtual Radar Server installed and running? If so then this is the place to ask about it.
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steflp
Posts: 2
Joined: Sat Dec 29, 2012 9:55 am

I dont see any planes !

Post by steflp » Sat Dec 29, 2012 10:22 am

Hello,

I 've bought a dongle TNT with rtl 2832 (Terratec) , I use this software http://sdrsharp.com/downloads/adsbsharp.zip with tuto find here : http://www.atouk.com/wordpress/?wpdmact ... 5ob3RsaW5r
and I receive data :
Image
I've updated options in VRS like this :
Image
Image

But I dont see any plane on the roadmap !
Image

Can you help me ...

Just an antoher thing when I use ADSB# to receive data from my RTL 2832 I just modify one thing "Decoder Confidence" 4 for 3
Image

Thanks a ot and happy new year ...

StefLP

agw
Posts: 2241
Joined: Fri Feb 17, 2012 3:20 am

Re: I dont see any planes !

Post by agw » Sat Dec 29, 2012 12:36 pm

All of the settings are correct - I think the problem is with the aerial, the messages that are coming through are corrupt. Something similar has been reported before (http://forum.virtualradarserver.co.uk/v ... &t=69#p274) and it was cured by using a better aerial.

Looking at the long frame messages in your telnet screenshot none of them are valid. The last three bytes should decode to 00 00 00 after the parity has been removed, but none of them do:

Code: Select all

(bytes from decoder)           (bytes after parity has been removed)
CF12B6B6F21C69110D42D4CB04CC = CF 12 B6 B6 F2 1C 69 11 0D 42 D4 93 6C 5E
82DB82D69020138C80288C0AEF24 = 82 DB 82 D6 90 20 13 8C 80 28 8C 62 72 CA
C29240E6E1A888490A49E0331343 = C2 92 40 E6 E1 A8 88 49 0A 49 E0 68 41 E0
838148C21F2E82A2444F9E8D04A2 = 83 81 48 C2 1F 2E 82 A2 44 4F 9E 41 3D 98
B4D806909824A163693A248BD4A0 = B4 D8 06 90 98 24 A1 63 69 3A 24 DB D4 14
9B20403149259D1562C6E2C56672 = 9B 20 40 31 49 25 9D 15 62 C6 E2 6B 74 90
Unfortunately the "Bad messages" counter on the front screen doesn't go up when messages come through with bad parity so it's difficult to tell when there is a high proportion of bad parity messages. I'm going to add better statistics for the next release to help diagnose these kinds of problems. But in short I think if you fit a more suitable antenna you should start seeing aircraft coming through.

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