System and method for aircraft altitude measurement using radar and known runway position
First Claim
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1. A method of determining an altitude of an aircraft using aircraft position information and runway position information, the method comprising:
- receiving a plurality of radar returns from a runway associated with the runway position information;
determining a range between the aircraft and the runway using the aircraft position information and the runway position information;
determining an angle between the aircraft and the runway using the radar returns; and
determining the altitude of the aircraft based at least in part on the angle between the aircraft and the runway and the range.
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Abstract
Another embodiment of the disclosure relates to an altitude system for an aircraft. The aircraft radar system includes a processor configured to determine an altitude of the aircraft using runway position information, and an angle to the runway associated with a radar beam to the runway. The angle to the runway is being determined using a pointing angle of the antenna adjusted with an angular offset. The angular offset is determined from phase processing.
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Citations
20 Claims
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1. A method of determining an altitude of an aircraft using aircraft position information and runway position information, the method comprising:
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receiving a plurality of radar returns from a runway associated with the runway position information; determining a range between the aircraft and the runway using the aircraft position information and the runway position information; determining an angle between the aircraft and the runway using the radar returns; and determining the altitude of the aircraft based at least in part on the angle between the aircraft and the runway and the range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An altitude system for an aircraft including an antenna directed at a pointing angle toward a runway, the altitude system comprising:
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a memory configured to store runway position information for the runway; and a processor configured to determine an altitude of the aircraft using the runway position information, and to determine an angle to the runway associated with a radar beam directed to the runway by the antenna, wherein the angle to the runway is determined using the pointing angle adjusted with an angular offset, where the angular offset is determined using phase processing by the processor. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus, comprising:
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an antenna; and a processor in communication with the antenna for processing radar return data associated with at least two radar returns from a runway received by the antenna, the processor providing a pointing angle for the antenna, wherein at least one of the radar returns is received using less than a full aperture of the antenna, wherein the radar return data is processed by the processor to determine an angle to the runway, wherein the angle to the runway is related to an angular offset calculated by the processor from the radar return data and the pointing angle, wherein the processor determines an altitude of the aircraft using the angle to the runway and range to the runway. - View Dependent Claims (18, 19, 20)
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Specification