System and method for positioning a GPS device
First Claim
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1. A system for positioning a GPS device, comprising:
- a GPS antenna (A);
a GPS device to which the GPS antenna (A) is connected, the GPS device comprising;
means for receiving signals from a plurality of GPS satellites;
means for saving a plurality of previously known alternative locations;
means for selecting a correct location of the GPS antenna (A) from the plurality of previously known alternative locations;
for performing said selecting, means for determining theoretical ranges between the GPS satellites and the alternative locations on the basis of positional data of the GPS satellites as well as positional data of the alternative locations; and
means for comparing the calculated theoretical ranges with ranges measured by the GPS device between the GPS satellites and the GPS antenna (A).
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Abstract
A system and a method for determining the correct position for a GPS device from a predefined set of alternatives are provided. Based on the known positions of the visible GPS satellites and of the predefined alternative locations, the system determines theoretical distances between each satellite and each location and/or differences thereof. These distances are related to the distance measured between the GPS device antenna and each GPS satellite in order to choose the location from among the predefined location alternatives. Also disclosed are a system and a method for identification of predefined container slots on a freight yard.
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Citations
18 Claims
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1. A system for positioning a GPS device, comprising:
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a GPS antenna (A); a GPS device to which the GPS antenna (A) is connected, the GPS device comprising; means for receiving signals from a plurality of GPS satellites; means for saving a plurality of previously known alternative locations; means for selecting a correct location of the GPS antenna (A) from the plurality of previously known alternative locations; for performing said selecting, means for determining theoretical ranges between the GPS satellites and the alternative locations on the basis of positional data of the GPS satellites as well as positional data of the alternative locations; and means for comparing the calculated theoretical ranges with ranges measured by the GPS device between the GPS satellites and the GPS antenna (A). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method by which a correct location of a GPS antenna (A) connected to a GPS device is selected from a plurality of previously known alternative locations, the plurality of previously known alternative locations being saved in means for saving provided in the GPS device, wherein in order to select the correct location of the antenna (A) connected to the GPS device,
theoretical ranges between a plurality of GPS satellites and the saved alternative locations are determined on the basis of positional data of the GPS satellites as well as positional data of the saved alternative locations, and the calculated theoretical ranges are compared with measured by the GPS device between GPS satellites and the GPS antenna (A).
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