TRIGGERED SATELLITE POSITIONING

摘要

A method of recording signals from a satellite positioning system. The method comprises recording, in response to a trigger signal, a block of data samples of a satellite broadcast, wherein at least one parameter of the recording depends on one or more parameters of the trigger signal. The source of the trigger signal is a camera and the parameters of the trigger signal comprise at least one of: information identifying whether a flash has been fired; an aperture value; a focal length value; a zoom value; a light-level value; an exposure time; a subject distance; information identifying orientation; and information identifying scene type.