Reduced noise estimator

A method, comprising:

• providing a precision guidance munition assembly configured to be assembled as a guided projectile and launched towards a target;
• obtaining a plurality of raw position data during flight of the guided projectile, including a plurality of position data points from a guiding sensor for determining positions of the guided projectile;
• establishing a window including a portion of the plurality of position data points;
• smoothing the portion of the plurality of position data points in the window, utilizing all position data points within the window;
• and
• determining a reduced noise position estimate of the guided projectile based, at least in part, on the smoothed portion of the plurality of position data points in the window.

A computer program product including one or more non-transitory machine-readable mediums having instructions encoded thereon that, when executed by one or more processors, result in a plurality of operations for guiding a projectile, the operations comprising:

• obtaining a plurality of raw position data during a flight of the projectile, including a plurality of position data points from at least one guiding sensor for determining positions of the projectile;
• establishing a window including a portion of the plurality of position data points;
• smoothing the portion of the plurality of position data points in the window, utilizing all the position data points in the window, utilizing a curve fit representing an expected trajectory shape of the guided projectile to produce a smoothed portion;
• determining a reduced noise position estimate of the guided projectile, based, at least in part, on the smoothed portion of the plurality of position data points in the window;
• predicting an impact point of the guided projectile relative to the target;
• determining whether the guided projectile will miss the target;
• and
• directing the guided projectile to the target by moving the at least one canard.