System for and method of sequential lobing using less than full aperture antenna techniques
First Claim
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1. A method of determining an angle to a target or terrain, the method comprising:
- receiving from a receive circuit first data associated with first returns received by a radar system associated with a first area of an antenna, wherein the first data includes a first phase;
receiving from the receive circuit second data associated with second returns received by the radar system associated with a second area of the antenna, wherein the first area is not identical to the second area, wherein the second data includes a second phase; and
calculating in an electronic processor the angle to the target or terrain using the first phase and second phase, wherein the angle is calculated using a difference between the first phase and the second phase associated with a difference in a distance from the first area of the antenna to the terrain or target and a distance from the second area of the antenna to the terrain or target, and wherein the angle is calculated using a Doppler component.
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Abstract
A method of determining an angle within the beam to a target using an airborne radar includes receiving first data associated with first returns associated with a first portion of an antenna. The method further includes receiving second data associated with second returns associated with a second portion of an antenna, wherein the first portion is not identical to the second portion. The method further includes determining the angle within the beam to the target using the first and second data.
244 Citations
20 Claims
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1. A method of determining an angle to a target or terrain, the method comprising:
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receiving from a receive circuit first data associated with first returns received by a radar system associated with a first area of an antenna, wherein the first data includes a first phase; receiving from the receive circuit second data associated with second returns received by the radar system associated with a second area of the antenna, wherein the first area is not identical to the second area, wherein the second data includes a second phase; and calculating in an electronic processor the angle to the target or terrain using the first phase and second phase, wherein the angle is calculated using a difference between the first phase and the second phase associated with a difference in a distance from the first area of the antenna to the terrain or target and a distance from the second area of the antenna to the terrain or target, and wherein the angle is calculated using a Doppler component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining an angle to a target or terrain, the method comprising:
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providing first data associated with first returns received by a radar system associated with a first area of an antenna, the first data representing a first vector to the target or terrain; providing second data associated with second returns received by the radar system associated with a second area of the antenna, wherein the first area is not identical to the second area, the second data representing a second vector to the target or terrain; providing third data associated with third returns received by the radar system, the third data representing a third vector to the target or terrain; removing a Doppler component in the second data and a Doppler component in the third data when calculating the angle to the target or terrain from the first data, the second data, and the third data. - View Dependent Claims (12, 13, 14)
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15. A radar system for receiving radar returns, the radar system comprising:
an electronic processor configured to receive electronic data associated with the radar returns received by the radar system, the electronic processor receiving first electronic data associated with a first portion of an antenna and second electronic data associated with a second portion of the antenna, the first portion being within, intersecting with, or being exclusive of the second portion and being not identical to the second portion, the electronic processor calculating an angle to a target or terrain, the angle being calculated using the second electronic data and a lower portion of the first electronic data, the lower portion of the first electronic data being associated with the radar returns received in a first area in the first portion of the antenna below a second area in the first portion of the antenna, an upper portion of the first electronic data being associated with the radar returns received in the second area of the first portion of the antenna, wherein the electronic processor does not use the upper portion of the first electronic data to calculate the angle, thereby reducing weather induced errors associated with the upper portion. - View Dependent Claims (16, 17, 18, 19, 20)
Specification