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General Electric of New York is patenting a way of making more accurate
Global Positioning System receivers (GB 2 339 639). Various tricks can be used
to boost the accuracy of the freely available, non-military version of GPS, but
the intensive processing involved makes heavy demands on a receiver’s batteries.
So to keep down cost and weight, GE’s portable receiver radios the GPS signals
it receives to a local station. This does the processing remotely and then tells
the receiver exactly where it is.