초록 ▼

The present inventions comprise a A method of estimating a minimum range for a target with respect to a first point of interest, independent of actual, range to the target, comprising obtaining three bearing data points; using the three bearing data points to determine a speed contribution Vos cos (

The present inventions comprise a A method of estimating a minimum range for a target with respect to a first point of interest, independent of actual, range to the target, comprising obtaining three bearing data points; using the three bearing data points to determine a speed contribution Vos cos (θβ) of a first point of interest to a distance from a relative velocity vector over a time frame comprising t0 to t0′; determining an angle θβ as defined by the bearing relative to ownship's heading at the point in time of closest approach to a second point of interest; and calculating a minimum range using a predetermined formula.

대표청구항 ▼

What is claimed is: 1. A method of estimating a minimum range from an ownship to a target at a closest point of approach (CPA) between the target and the ownship, comprising:a. a bearing detector obtaining at least three bearing data points of the target with respect to an the ownship, wherein each

What is claimed is: 1. A method of estimating a minimum range from an ownship to a target at a closest point of approach (CPA) between the target and the ownship, comprising:a. a bearing detector obtaining at least three bearing data points of the target with respect to an the ownship, wherein each of said bearing data points includes a bearing angle and a corresponding time of acquisition;b. using the three bearing data points to determine a speed contribution Vos of a first point of interest to a distance from a relative velocity vector over a time frame comprising an initial time to to a predetermined time ti;c. a computer system determining an angle θβas defined as, where θβ is the bearing relative to the ownship's heading at the point intime (tβ) of the closest point of approach to a second point of interest; andd. the computer system calculating a minimum range Min RCPA using the formula: Min RCPA=VOS(tβ−ti)cos(θβ−θi)θi|=0;using the calculated minimum range for at least one of: targeting a weapon with respect to the target, navigating the ownship;e. wherein tβ is the time at which θβ was mreaured and θi is a bearing angle to the target relative to the ownship corresponding to a first of said at least three bearing data points obtained at time ti, and Vos is the speed of the ownship during said obtaining said at least three bearing data points.