ABSTRACT
Attitude determination (AD) refers to techniques utilized to determine the angular orientation of a spacecraft with respect to some reference frame. Spacecraft attitude and angular velocity are vital pieces of information needed for all spacecraft applications requiring accurate attitude control,
11.1 Introduction ......................................................................................................................... 181 11.1.1 AD Subsystem ....................................................................................................... 182 11.1.2 AD Algorithms ...................................................................................................... 182
11.1.2.1 Static Algorithms .................................................................................. 182 11.1.2.2 Dynamic Algorithms ............................................................................ 182
11.2 Nonlinear Filtering Problem and Solutions ........................................................................ 183 11.2.1 Nonlinear Filtering Formulation ........................................................................... 183 11.2.2 Nonlinear Filtering Classification ......................................................................... 184
11.2.2.1 Local Filters ..........................................................................................184 11.2.2.2 Global Filters ........................................................................................184
