Radar scan conversion for plan position indicator

A computer-readable media having instructions stored thereon for causing a system to perform a method to display coordinates of radar scan data, the method comprising:

• dividing an angular display interval into at least one sweep sector,
• computing polar (r, θ) coordinates for rectangular (x, y) coordinates at each pixel of the angular display interval;
• computing bounds and angular width of a block of polar radar (R, θ) coordinates that map to a given pixel of the rectangular (x, y) coordinates;
• creating a mechanism to associate the bounds of the block in polar radar (R, θ) coordinates with the rectangular (x, y) coordinates;
• calculating bounds associated with an x-coordinate of the given pixel in a first sweep sector of the at least one sweep sector:
• assigning a maximum of the calculated x-coordinate bounds to xmax and a minimum to xmin;
• calculating bounds associated with a y-coordinate of the given pixel for each x-coordinate in the first sweep sector;
• assigning a maximum of the calculated bounds of the y-coordinate to ymax and a minimum to ymin;
• retrieving the bounds and the angular width of the block of polar radar (R, θ) coordinates for each rectangular (x, y) coordinate from the mechanism,
• retrieving observed radar parameter values scanned within the corresponding retrieved block bounds;
• and
• displaving the parameter values within the block on a display.

An algorithm to convert radar scan data to (x, y) coordinates of a display comprising:

• means for dividing an angular display interval into at least one sweep sector;
• means for computing polar (r, θ) coordinates for rectangular (x, y) coordinates at each pixel of the angular display interval;
• means for computing bounds and angular width of a block of polar radar (R, θ) coordinates that map to a given pixel (x, y) of the rectangular (x, y) coordinates;
• means for creating a mechanism to associate the bounds of the block in polar radar (R, θ) coordinates with the rectangular (x, y) coordinates;
• means for calculating bounds associated with an x-coordinate of the given pixel in a sweep sector of the at least one sweep sector;
• means for assigning a maximum of the calculated x-coordinate bounds to xmax and a minimum to xmin;
• means for calculating bounds associated with a y-coordinate of the given pixel for each x-coordinate in the sweep sector;
• means for assigning a maximum of the calculated bounds of the y-coordinate to ymax and a minimum to ymin;
• means for retrieving the bounds and the angular width of the block of polar radar (R, θ) coordinates for each rectangular (x, y) coordinate from the mechanism;
• means for retrieving observed radar parameter values scanned within the corresponding retrieved block bounds;
• and
• means for displaying parameter values within the block on a display.