Abstract text

A remote tracking device for use in a remote tracking system is described. The remote tracking device includes a positioning system receiver, such as GPS, operable to receive signals indicative of the location of the remote tracking device, a cellular transceiver operable to communicate with the central monitoring center, and a processor connected to the positioning system receiver and the cellular transceiver, the processor operable to monitor at least one environmental condition for the remote tracking device, and to adjust the frequency of an operation of the remote tracking devices based on the at least one environmental condition. The environmental condition may include the devices rate of movement, proximity to an area of interest, time of day, or other condition in response to which it would be desirable to alter the frequency of operation of the remote tracking device.