ISR School at MIT Haystack Observatory, Phil Erickson (at the laptop) showed us his low-cost radar. He revealed this experiment to the school for the first time in Banff last year, and we reported about it previously, including links to the instructions. Above, the radar electronics are mounted on a wooden board, and the antennae are made up of two coffee cans (a.k.a. cantennae).
USRP) to replace most of the basic electronics, but this allows him to make more sophisticated measurements. In the photo above, he tried (successfully) to create an "F-region" double-hump spectrum by moving his hands rapidly in opposite directions.
Photos: Thomas Ulich.