Apparatus and method for long term tracking for ASW applications
First Claim
1. A target tracking and plotting method for a target, said method being provided for use in a computerized system, comprising:
- identifying the target with initial coordinates and an initial time;
obtaining second coordinates for the identified target at a second time;
building a leg from the initial coordinates, initial time, second coordinates and second time if said initial coordinates are a threshold distance away from said second coordinates;
recording the built leg;
obtaining current coordinates for the identified target at a current time if said current coordinates are the threshold distance away from said second coordinates;
determining if the target is maintaining a steady speed;
determining if the target is maintaining a steady course;
entering the current coordinates for the identified target as an addition to the built leg if the target is maintaining a steady speed and a steady course;
recording the addition to the built leg;
restarting said step of identifying the target with said current coordinates and current time when the target is not maintaining a steady speed;
restarting said step of identifying the target with said current coordinates and current time when the target is not maintaining a steady course; and
providing plots of any selected recorded legs when a demand is received.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus and method are disclosed that provide target motion analysis with the ability for having long-term tracking. The apparatus and method provide a leg builder program that monitors successive positional updates from a target and converts the updates into a leg format. The leg format consists primarily of start time, latitude/longitude, time on leg, and end latitude/longitude. The leg format is continuously updated so long as the course of the target is steady. The leg format further embodies routines that provide for a spherical earth model and also for handling unstable course and speed conditions from a target.
10 Citations
6 Claims
-
1. A target tracking and plotting method for a target, said method being provided for use in a computerized system, comprising:
-
identifying the target with initial coordinates and an initial time; obtaining second coordinates for the identified target at a second time; building a leg from the initial coordinates, initial time, second coordinates and second time if said initial coordinates are a threshold distance away from said second coordinates; recording the built leg; obtaining current coordinates for the identified target at a current time if said current coordinates are the threshold distance away from said second coordinates; determining if the target is maintaining a steady speed; determining if the target is maintaining a steady course; entering the current coordinates for the identified target as an addition to the built leg if the target is maintaining a steady speed and a steady course; recording the addition to the built leg; restarting said step of identifying the target with said current coordinates and current time when the target is not maintaining a steady speed; restarting said step of identifying the target with said current coordinates and current time when the target is not maintaining a steady course; and providing plots of any selected recorded legs when a demand is received. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification