One common hobby-grade SDR is the KiwiSDR ... to give the Raspberry a wider receive range (up to 60 MHz) and — in theory — better performance in terms of dynamic range and distortion.

His solution was to read data from the utility meter using RTL-SDR to fill in the blanks. The results are good so far, and there’s no reason similar readings for gas and water can’t also be done.

This study represents the first worldwide SDR of football players (and athletes). It is obvious that such an effort suffers from several shortcomings. Most importantly, many countries lack a duty to ...