iFly GPS Forum

Jim,

I've asked Alexey for a D2 model to retest. We no longer have one of the dual band units here from SkyRadar. We have several other dual band units from other makers and we are seeing the 1090 traffic on those. I was talking with Walter and he said he thinks SkyRadar is doing something different with the 1090 decoding, basically different than the standard GDL90 protocol. Once we get the D2 from Alexi, we'll see what is going on.

You are correct in that the ADS-B out should wake up the tower. If you are in range of the 978 ground tower and your "out" device has triggered it, you should be seeing both 978 and 1090 traffic in your service volume via the ground signal. The way to tell is if you see a callsign or tail number on that traffic, it is direct air to air. If the tail number is a N number it's most likely oui out. If it is AA or UA or commercial, then you can bet it's 1090.

We will get this worked out and thanks for your help with this.

That is something to look into, but I've run test with the iLevil, Clarity and even others and saw the ground TIS-B, yet with the SkyRadar D2, it seems to be nothing. I can connect a Single Band SkyRadar to the iFly and the SkyRadar App and see the same traffic, even around DFW. But with the D2, it apparently is not there.

Walter is looking in to some additional data and sample data that SkyRadar just sent us so hopefully, we will get to the bottom of this. I'll pass this along so they can look at all aspects and the more information the better when it comes to troubleshooting.