| 摘要 |
A global positioning system recorder (GPSR), comprising a housing that contains a GPS receiver and associated circuitry, an antenna external to the hou sing and operatively connected to the receiver, a memory card slot, and control circu itry inside the housing for interfacing the GPS receiver with the memory slot. In operation, a memory element such as a PCMCIA card containing a set of operationa l parameters for the GPSR is inserted into the memory slot. The receiver reads the operational data from the memory card, receives GPS signals via the antenna, processes the signals to determine the position of the recorder, and writes the position data (along with the date and time) to the memory element. In a preferr ed embodiment, a new position data point is recorded only if the GPSR has moved since the last position data point was recorded, and/or if a parameter of intere st has changed by at least a preselected amount. The GPSR may also be connected to one or more sensors that measure various environmental parameters of interest. Data from these sensors is processed, integrated with the corresponding time/position data, and stored on the memory card for later analysis.
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