As a firm, UHU Technologies is structured around protecting GPS through use of spatial processing techniques that cannot be spoofed. Involving personnel with the firm having deep roots in signal intelligence and radio location -- from decades of experience producing high performance hardware -- protection of GPS receivers for critical applications involves use of techniques borrowed from the Signals Intelligence (SIGINT) world. The firm's patented techniques assure the integrity of GPS through spatial processing; for each signal that is receive, the angle of arrival is computed and compared to known satellite location for that signal. NOTE: the angle of arrival is the only signal feature that cannot be spoofed. Through additional signal processing, the firm's personnel also spatially null (subtract) any spoofers or jammers and mitigate the threat.