Patent ID: 6084542
Filing Date: 2000-07-04
Classification: G01C,G01S

Abstract:
A method for recording the global position of an object, said method comprising the steps of:recording operational parameters for a global positioning system recorder on a portable storage device;installing said storage device in an apparatus operationally connected to said object, said apparatus connected to an antenna capable of receiving GPS satellite signals, said apparatus havingGPS circuitry for determining said position by analysis of GPS satellite signals received by said antenna, andprogrammable control circuitry for reading said operational parameters from said storage device, said control circuitry recording said position on said storage device in accordance with said operational parameters; andproviding power to said apparatus so that said control circuitry writes said position on said storage device in accordance with said operational parameters; andsaid writing step including:measuring a value of a parameter of interest;checking a previous recorded position of said object;checking a previous recorded value of said parameter of interest corresponding to said previous recorded position; andwriting a new position of said object to said storage device only if said parameter of interest has changed since said previous recorded position was written.