Analytical Geometrical Determination of BSAR Resolution

In the bistatic synthetic aperture radar (BSAR) theory, three types of range resolutions can be defined: a generalized range resolution with respect to the bistatic angle's bisector, range resolution on a target‐receiver line of sight and range resolution along track of the target. The first two resolutions are relative, whereas the third is a certain resolution. This chapter reveals the time or spatial dependence of BSAR resolutions based on an analysis of the analytical expression for the range resolution. To define the along‐track range resolution, the chapter demonstrates the usage of the equation of the ellipse and the equation of the linear trajectory. To calculate the bistatic radar range resolution along a target‐receiver line of sight, the coordinates of its two consecutive crossing points with adjacent equal‐range ellipses have to be determined. Equations derived in the chapter can be successfully used in determining the size of the range resolution cell.