Imaging seeker for a spin-stabilized projectile

A method for generating a course-correction signal for a spin-stabilized projectile, the method comprising:

• receiving a first image that is obtained at a first capture time, wherein the first image has a first image-rotation angle;
• receiving a second image that is obtained at a second capture time subsequent to the first capture time, wherein the second image has a second image-rotation angle;
• identifying a target captured within both the first and second images;
• determining, for the identified target, relative position of the identified target with respect to rotation-center pixel coordinates for each of the first and second images;
• and
• generating a course-correction signal based at least in part on the determined relative position of the identified target with respect to the rotation-center pixel coordinates.

A system comprising:

• a forward-looking imager disposed on a projectile;
• a guidance, navigation and control unit (GNC) disposed on the projectile;
• one or more processors;
• and
• computer-readable memory encoded with instructions that, when executed by the one or more processors, cause the system to:
• receive a first image that is obtained at a first capture time, wherein the first image has a first image-rotation angle;
• receive a second image that is obtained at a second capture time subsequent to the first capture time, wherein the second image has a second image-rotation angle;
• identify a target captured within both the first and second images;
• determine, for the identified target, relative position of the identified target with respect to rotation-center pixel coordinates for each of the first and second images;
• and
• generate a course-correction signal based at least in part on the determined relative position of the identified target with respect to the rotation-center pixel coordinates.