Sensis Corp., Syracuse, N.Y., expanded its Multistatic Dependent Surveillance (MDS) system for surface surveillance at London Heathrow Airport. This is the second expansion of multilateration equipment at the London Airport since it become operational in 2002. In 2005, it was expanded to improve surface surveillance for the area surrounding a new air traffic control tower. This expansion meets surveillance challenges from the airport’s growth associated with Terminal 5. Sensis MDS uses multiple non-rotating sensors to triangulate aircraft location based on transponder signals and supply air traffic controllers with aircraft position and identification information. For related news