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1. Target Relative Coordinates
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In a right-handed Cartesian 3D plane, with North being parallel to the y-axis, the relative position of a target can be defined by the following terms:

1. Target X: TargetDistance*cos(TargetElevation)*sin(TargetHeading)
2. Target Y: TargetDistance*cos(TargetElevation)*cos(TargetHeading)
3. Target Z: TargetDistance*sin(TargetElevation)

In the SP coordinate system, these correspond to:

1. X: Latitude
2. Y: Longitude
3. Z: Altitude