Patent ID: 6547671
Filing Date: 2003-04-15
Classification: A63B,G01S

Abstract:
A method for determining at least one approximate launch parameter of an object in flight after being launched from an initial position comprising the steps of:positioning a plurality of sensors for measuring a velocity of the object while in flight, wherein each sensor is positioned along a line substantially perpendicular to a projection onto the ground of a straight flight path expected when the object is launched on a direct bearing towards a desired target location, wherein the line is at a known distance forward of the initial position measured along the projection of the expected straight flight path, and wherein the sensors are positioned along the line at locations corresponding to selected aim angles; measuring the velocity of the object while in flight using each of the sensors; performing independent launch angle calculations corresponding with each sensor using a mathematical model; and using the results of the independent launch angle calculations to obtain at least one approximate launch parameter of the object, wherein an approximate aim angle is obtainable by direct calculation from ratios of the results of the independent launch angle calculations.