Methods and systems for measuring terrain height
First Claim
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1. An altitude measuring system comprising:
- a radar altimeter configured to measure an altitude; and
a digital terrain database comprising data relating to terrain elevation and at least one data parameter relating to an accuracy of the terrain elevation data and the altitude measured by said radar altimeter.
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Abstract
An altitude measuring system is described that includes a radar altimeter configured to measure altitude and a digital terrain map database. The database includes data relating to terrain elevation and at least one data parameter relating to an accuracy of the terrain elevation data and the altitude measured by the radar altimeter. The system is configured to weigh an altitude derived from the terrain elevation data and the radar altimeter measurements according to the at least one data parameter.
71 Citations
18 Claims
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1. An altitude measuring system comprising:
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a radar altimeter configured to measure an altitude; and a digital terrain database comprising data relating to terrain elevation and at least one data parameter relating to an accuracy of the terrain elevation data and the altitude measured by said radar altimeter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for determining an altitude of an air vehicle, said method comprising:
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measuring an altitude using a radar altimeter; retrieving data from a database relating to an accuracy of at least one of radar altimeter measurements for the location and digital terrain database elevation data for the location; and weighting the altitude as determined by the radar altimeter according to the accuracy data for the location retrieved from the database. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification