| 摘要 |
PURPOSE:To monitor a target continuously according to the rotation of an antenna by displaying storage data recorded in a data memory continuously even on a display screen corresponding to the outside of a search range. CONSTITUTION:Actual video data 11 and actual azimuth angle data 12 which are obtained by searching in one turn of the antenna are recorded in the data memory 1 successively on every turn of the antenna. A comparator 2 compares the actual azimuth angle data 12 with preset search range specification data 17 and outputs a memory control signal 18 for the data memory 1 and a switching signal 19 for a data switch 3 according to the comparison result. The data switch 3 switches monitor information formed of the actual video data 11 and actual azimuth angle data 12 and storage information formed of stored video data 13 and stored azimuth angle data 14 selectively with the switching signal 19 and outputs the selected data to a display device.
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