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Pete Zaitcev zaitcev at kotori.zaitcev.usI know someone who's reveiving FIS-B with a GDL 39, although his home base is about 100 km north-east. I'm somewhat confident that I should have the coverage. One problem is, from what I heard, the ground stations will not broadcast anything until a UAT-equipped aircraft checks in. Regardless, I was hoping that Nick or other experts chime in on the code itself. Honestly I have no clue what I'm doing here. I imagine that if signal is present, then vector pointed by Q+jI rotates at ~300 revolutions per second. Therefore, I calculate the phase angle difference between two samples taken at twice the UAT bit rate and see if it's anywhere reasonable. It may be a bogus technique for any number of reasons. -- Pete On Wed, 22 Jan 2014 08:25:57 -0800 David Jacobowitz <david.jacobowitz at gmail.com> wrote: > This may be dumb because I haven't looked into it, but is it reasonable to > expect to receive a signal? > > Are you in the US? There really aren't that many UAT equipped aircraft yet. > The FAA is rebroadcasting ADSB ES responses on UAT as well as providing > weather and other data, but that is all coming from ground stations. If you > need line of sight and you're on the ground yourself you may be out of luck. > > - Dave J