The University of Strathclyde is developing an in-orbit system to detect and track space debris from small fragments to inactive satellites. The work, supported by the UK and European Space Agencies, is a collaboration between the Aerospace Centre of Excellence and the Centre for Signal & Image Processing at the University of Strathclyde. Clemente and Vasile have demonstrated the technical feasibility of the detection of small pieces of debris using a range of existing illuminators and a receiver in Low Earth Orbit. See also Anti-radiation missile Bistatic radar Multistatic radar GNU Radio Passive Radar Project Multilateration Radar tracker Semi-active radar homing P-18 radar YLC-2 Radar Stealth aircraft VERA passive sensor Low-frequency radar Signals intelligence Kolchuga passive sensor HEMPAS-CCIAS Radar Elta EL/L-8388 ELINT passive radar References Further reading Howland, P.E.: "A Passive Metric Radar Using the Transmitters of Opportunity", Int. Conf.on Radar, Paris, France, May 1994, pp. 251–256 Howland, P.E.: "Target tracking using television-based bistatic radar", IEE Proc.-Radar, Sonar & Navig., Vol. 146, No. 3, June 1999. Howland, P.E., Maksimiuk, D., and Reitsma, G.: "FM radio-based bistatic radar", Radar, Sonar and Navigation, IEE Proceedings, Vol. 152, Issue 3, 3 June 2005 pp. 107 – 115, Digital Object Identifier 10.1049/ip-rsn:20045077 Kulpa K., and Czekała Z.: "Long-Range Performance Increase in Passive PCL Radar", 3rd Multinational Conference on Passive and Covert Radar, 2003 (PCR-2003). University of Washington Applied Physics Laboratory, Seattle, Washington, 21–23 October 2003 K. Kulpa, Z. Czekala, "Masking Effect and its Removal in PCL Radar," IEE Proc. Radar, Sonar and Navigation, vol. 152, Issue 3, pp. 174 – 178, June 2005 Nordwall B.D.: "Silent Sentry A New Type of Radar", Aviation Week & Space Technology, no 30, 1998, pp 70–71 H. D. Griffiths, C. J. Baker, J. Baubert, N. Kitchen, M. Treagust, "Bistatic radar using satellite-borne illuminators of opportunity", Proc. International Conference RADAR 2002, pp. 1–5, October 2002 M. Malanowski, "Influence of Integration Time on Tracking Performance in PCL Radar", Proc. Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments, vol. 6937, 28 December 2007 External links Simple example of passive radar using analogue TV A recording of the 2004 Watson-Watt Lecture at the UK Institution of Electrical Engineers (IEE) can be seen at the IEE website, which was on the subject of "Passive Covert Radar: Watson-Watt's Daventry Experiment Revisited". This includes a summary of the work in this field since World War II. A recording of a briefing on "The