Global Navigation Satellite Systems (GNSS), providing continuous coverage on land, at sea, in the air and, indeed, in space itself, came of age in the mid-1990's. But the original primary purpose of these systems (USA's Navstar GPS and the Soviet Union's GLONASS) was essentially military, as integral parts of weapons' (nuclear) delivery systems. Towards the end of the Cold War, both GPS and GLONASS took on the important civil role which they play today and (with Europe's new Galileo system) will play in the future.

The talk will cover some of the technical developments which took place at the University of Leeds at the height of the Cold War in decoding, interpreting and exploiting the signals from GLONASS and building sensors combining GPS and GLONASS, which today offer so much to potential users such as civil aviation.