I prepared as follows:
- calculated next passes on the AMSAT website according to my location,
- picked a comfortable pass, that would fly high over my head (strangely enough, at the time I'm driving to the office!)
- prepared a 1/4 wave vertical antenna for the magmount car base
- located a clear spot to park
For another pass few days later I had assembled a Moxon directional antenna (two elements, folded), and tried again. While it did improve the strenght, sitting on a concrete floor created a lot of reflections and I could not follow AO-51 in its flight over my head. It was strongest when beaming to the ground! But the antenna works as expected, if pointing some ground-based signals.
Anyway, a short youtube video with audio should show you how easy AO-51 is.
On the second attempt I actually received another "bird" sending CW telemetry on the same frequency (435.3 MHz +/- doppler), but I was unable to discover who it was, yet.