B.1 INTRODUCTION

The width of a bistatic range cell, ? R _B, is usually given as [73]

where

c = speed of light,

? = compressed pulsewidth,

? = bistatic angle.

As shown in Figure B.1, ? R _B is measured along the bisector of the bistatic angle, line , and the bistatic angle is measured at the intersection of the receiver-to-target LOS and the inner edge of the bistatic range cell, or the smaller of the two confocal ellipses (isorange contours) defining the range cell.

This width can also be defined as

Figure B.1: Geometry for approximation to the width of a bistatic range cell

where ? R ? _B is measured along the receiver-to-target LOS, line in Figure B.1. When is approximated as a right triangle, ? R _B = ? R ? _B cos( ?/2), so that (B.1) and (B.2) are equivalent. Note that c ?/2 = ? R _M, the width of a monostatic range cell.

An intuitive explanation of (B.1) and (B.2) is that the bistatic range cell broadens as ? increases from the pseudomonostatic geometry on the extended baseline ( ? = 0, ? R _B = ? R ? _B = ? R _M). This broadening occurs because the separation between two confocal ellipses defining the bistatic range cell increases from a minimum on the extended baseline to a maximum at the point where the...