A Method for Determination of Target Aspect Angle with Respect to an Unleveled Radar

This document is a continuation of work derived in "A Method for the Determination of Target Aspect Angle with Respect to a Radar" by Caraway and Abell. The original paper derived the target aspect angle assuming that the radar would be emplaced level with respect to gravity. With the need for rapid and flexible emplacement, some radars may be designed to allow for unlevel operation. Aspect angle determination is essential in many forms of Noncooperative Target Identification (NCTI). This document presents a rigorous development of the mathematics for solving for target aspect angle given target and radar position and attitude. A method for aspect angle estimation given target track data will also be presented.