Azimuth-only Estimation of Target Course Using Trigonometric Function Directly

The problem of azimuth-only calculation of target course angle with a single station is studied independent of time parameter. On a two-dimensional plane, for a uniform moving target in a straight line, if a stationary single station is assumed to be able to obtain the azimuth information of the target three times in a row with equal spacing in the moving path of the target, then the analytic expression of the course angle of the target can be obtained in a simple mathematical form by directly using trigonometric functions. The error analysis shows that the measuring accuracy of target course angle based on trigonometric function method is suitable for engineering application.