| 摘要 |
PURPOSE:To enable pursuit of the estimated course of a target without making a chart by comparing a target azimuth and observed azimuth of the time when calculated from the items of an established target and by judging whether the deviation mean value is over a certain value or not. CONSTITUTION:The target items of a standard time, target azimuth, distance, speed of a target body, etc. are set up to digital switches 1-5 respectively and a target observation time, observer's own two-dimensional position X, Y, an observation azimuth at that time, etc. are set up to digital switches 6-9 and a data set switch 10 is operated. Then the target azimuth at that time based on the target items is calculated by an arithmetic unit 11 and the deviation with the observated azimuth is decided by a deviation arithmetic device 12. And when the mean value of the past several times deviations exceeds the specified value an alarming lamp 14 is actioned via a judging circuit 13. The pursuit for the estimated course of the target is thus performed without making a chart. |
