The trial had heard Jolly, from Forfar, Angus, picked up vulnerable young women on the streets of Dundee and took them to a caravan on the outskirts of thecity.
NASA's Jet Propulsion Laboratory, in Pasadena, California, used short-wavelength microwaves in 1992 to reveal caravan trails leading to the lost city of Ubar in the Arabian peninsula.
Kenneth Jolly admitted trawling the city's streets to pick up prostitutes on a regular basis before taking them to his caravan and paying them for sex.