Constant altitude plan position indicator display for multiple radars
First Claim
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1. A system to reduce the data from a plurality of radars to a common universal latitude-longitude coordinate frame, the system comprising:
- radar data received from the plurality of radars, the plurality of radars at separate geographical locations and having one or more overlapping radar regions;
a processor to reduce the data from the plurality of radars to a common universal latitude-longitude coordinate frame having a constant altitude above the earth'"'"'s surface that includes multiple data cells, and to combine data from multiple radars for at least one cell in the one or more overlapping radar regions and to fill in gaps in the coordinate frame using interpolation; and
a memory to store an arc length for each radar beam elevation, and a weight and a range for each increment in each arc length for the constant altitude above the earth'"'"'s surface.
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Abstract
A system and a method to receive radar data from a plurality of radars and to reduce the data from the plurality of radars to a common universal latitude-longitude coordinate frame. The plurality of radars may be positioned at separate geographical locations and may have one or more overlapping regions. The data may be combined in the one or more overlapping regions.
42 Citations
19 Claims
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1. A system to reduce the data from a plurality of radars to a common universal latitude-longitude coordinate frame, the system comprising:
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radar data received from the plurality of radars, the plurality of radars at separate geographical locations and having one or more overlapping radar regions; a processor to reduce the data from the plurality of radars to a common universal latitude-longitude coordinate frame having a constant altitude above the earth'"'"'s surface that includes multiple data cells, and to combine data from multiple radars for at least one cell in the one or more overlapping radar regions and to fill in gaps in the coordinate frame using interpolation; and a memory to store an arc length for each radar beam elevation, and a weight and a range for each increment in each arc length for the constant altitude above the earth'"'"'s surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system to reduce the data from a plurality of radars to a common universal latitude-longitude coordinate frame, the system comprising:
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means for receiving radar data from the plurality of radars, the plurality of radars having one or more overlapping radar coverage regions; means for determining latitude-longitude coordinates associated with the radar data; means for combining the data, in latitude-longitude coordinates, in the one or more overlapping regions to provide a constant altitude plan position indicator for a desired altitude above the surface of the earth; and a memory to store an arc length for each radar beam elevation, and a weight and a range for each increment in each arc length for a constant altitude above the earth'"'"'s surface. - View Dependent Claims (10)
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11. A method to reduce the data from a plurality of radars to a common universal latitude-longitude coordinate frame, the method comprising:
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receiving radar data from the plurality of radars, the plurality of radars having one or more overlapping radar regions; determining latitude-longitude coordinates associated with the radar data having a constant altitude above the earth'"'"'s surface; combining the data in latitude-longitude coordinates corresponding to at least one cell in the one or more overlapping regions; calculating an arc length for each radar beam elevation, and a weight and a range for each increment in each arc length for the constant altitude above the earth'"'"'s surface; and storing the arc length for each radar beam elevation, and the weight and range for each increment in each arc length for the constant altitude above the earth'"'"'s surface in a look-up table. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A computer-readable medium having program instructions to perform a method to reduce the data from a plurality of radars to a common universal latitude-longitude coordinate frame, the method comprising:
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receiving radar data from the plurality of radars, the plurality of radars having one or more overlapping radar regions having a constant altitude above the earth'"'"'s surface; determining latitude-longitude coordinates associated with the radar data; combining the data in latitude-longitude coordinates corresponding to at least one cell in the one or more overlapping regions; calculating an arc length for each radar beam elevation, and a weight and a range for each increment in each arc length for the constant altitude above the earth'"'"'s surface; and storing the arc length for each radar beam elevation, and the weight and range for each increment in each arc length for the constant altitude above the earth'"'"'s surface in a memory.
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Specification