Passive Radar (PR) utilises pre-existing transmitter infrastructure to illuminate targets. Examples of „Illuminators of Opportunity“ (IoO) include FM radio, terrestrial digital TV (DVB-T/2), LTE, and Satellite-based illuminators. Passive Radar is a maturing technology, with several products available on the market. PR is still, nevertheless, an emerging technology owing to the fact that new and emerging potential Illuminators are coming online – such as the use of emerging satellite constellations like Starlink as well as 5G based transmissions. This 2-day course will cover the fundamental principles of Passive Radar and will provide details of advanced sensing applications.