Jean-Michel Friedt demonstrated a passive radar system using signals from the NISAR satellite, which is jointly operated by NASA and ISRO. This technique leverages existing RF sources to create images of terrain without transmitting any signals, showcasing the potential for low-cost, legal surveillance with simple equipment like SDRs and Raspberry Pis. Developers should monitor regulatory changes as passive radar technology becomes more accessible and widely used.
Read the full article at Hackaday
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