I got the state vector equivalent for the ground station, so it's good data. I think Oliver does the same. However, he's a step ahead, because he does the error correction as well, using Phil Karn's library. I'm going to try and rig my own error-correction for fun and profit. But it'll take a while.
If you want receiption right now, you might want to look at dump978. My self-clocking code needs a bit of work even before the error correction. The ADS-B packets vary in length, so there's a bit of tedious programming needed to capture them (one must peek into the packet before it's corrected). Also, I only capture half of the packets, because, again, it takes work to arrange 2 passes over half-bits or other trick.