Self-contained, self-surveying differential GPS base station and method of operating same
First Claim
1. A self-contained, self-surveying differential GPS base station system, comprising:
- a differential GPS base station capable of generating National Marine Electronics Association (NMEA) data sentences, each of said data sentences identifying a determined position of said base station and fix quality information associated with said determined position, said base station further being capable of generating Radio Technical Commission for Maritime Services (RTCM) differential corrections for transmission over the air waves;
means for automatically identifying said determined position as an acceptable position when said fix quality information associated with said determined position satisfies a selected criteria;
means for storing said selected criteria;
means for automatically averaging together each said acceptable position to generate an updated position; and
means for automatically supplying said base station with said updated position for use in generating said RTCM differential corrections.
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Abstract
A self-contained, self-surveying differential GPS base station system and method of operating same are provided. The system and method use a conventional differential GPS base station. The base station'"'"'s National Marine Electronics Association (NMEA) data sentences identify a determined position of the base station and fix quality information associated with the determined position. The system and method automatically identify the determined position as an acceptable position when the fix quality information associated with the determined position satisfies a selected criteria which is stored on-site. The system and method then automatically average together each acceptable position to generate an updated position. The updated position is automatically supplied to the base station at a prescribed time for use by the base station in generating Radio Technical Commission for Maritime Services (RTCM) differential corrections for transmission over the air waves.
79 Citations
22 Claims
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1. A self-contained, self-surveying differential GPS base station system, comprising:
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a differential GPS base station capable of generating National Marine Electronics Association (NMEA) data sentences, each of said data sentences identifying a determined position of said base station and fix quality information associated with said determined position, said base station further being capable of generating Radio Technical Commission for Maritime Services (RTCM) differential corrections for transmission over the air waves;
means for automatically identifying said determined position as an acceptable position when said fix quality information associated with said determined position satisfies a selected criteria;
means for storing said selected criteria;
means for automatically averaging together each said acceptable position to generate an updated position; and
means for automatically supplying said base station with said updated position for use in generating said RTCM differential corrections. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a differential GPS base station, comprising the steps of:
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providing a differential GPS base station capable of generating National Marine Electronics Association (NMEA) data sentences, each of said data sentences identifying a determined position of said base station and fix quality information associated with said determined position, said base station further being capable of generating Radio Technical Commission for Maritime Services (RTCM) differential corrections for transmission over the air waves;
automatically identifying said determined position as an acceptable position when said fix quality information associated with said determined position satisfies a selected criteria;
automatically averaging together each said acceptable position to generate an updated position; and
automatically supplying said base station with said updated position for use in generating said RTCM differential corrections. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of operating a differential GPS base station, comprising the steps of:
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providing a differential GPS base station capable of generating National Marine Electronics Association (NMEA) data sentences, each of said data sentences identifying a determined position of said base station and fix quality information associated with said determined position, said base station further being capable of generating Radio Technical Commission for Maritime Services (RTCM) differential corrections for transmission over the air waves;
storing selected criteria for evaluating said fix quality information;
automatically identifying said determined position as an acceptable position when said fix quality information associated with said determined position satisfies said selected criteria;
automatically averaging together each said acceptable position to generate an updated position;
repeating said step of automatically averaging a specific number of times; and
automatically supplying said base station with said updated position at the conclusion of said step of repeating for use in generating said RTCM differential corrections. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification