[mjb]

Nice. The down-range focus on the fenceposts is very good. Cross-range focus isn't as good, still impressive for a such a low-cost system. It'd be very interesting to see some images of a more target-rich environment.

Radar, SAR, and especially passive multistatic SAR are technologies that I'm sure we're going to see more of in future. Passive SAR (or transmitter-of-opportunity SAR) can be computationally expensive, but pieces seem to be there to build something that works really well.