The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide expert advice on some of the most pressing challenges facing the nation and world. Our ...

A spacecraft attitude kinematics model, attitude measurement model, and filter algorithm are three important parts in spacecraft attitude determination, and a high-precision filtering algorithm is the ...

It remains the dream of military imagery analysts who stare at surveillance footage all day: sensors and cameras that alert their human masters to looming threats. The Navy's next research program ...