To provide a ship-mounted radar capable of solving a conventionally existed problem that a HF radar is characterized by being able to explore a long distance of several 100 km to 4000 km by reflection in the ionized layer, or the like, but an array antenna facility with an antenna opening length of 100 m or more was required, for example for a 15 MHz radar wave, when narrowing a radar beam width in order to improve azimuth (angle) resolution.SOLUTION: In the present invention, in a ship-mounted radar that can improve a resolution without using a large array antenna facility by a synthetic aperture processing technology, although a calculation error occurs caused by generation of phase fluctuation of a reception echo due to rolling and pitching of a hull, the present invention is characterized in that the error is reduced by rotating the phase corresponding to a detection amount of a shaking detector.SELECTED DRAWING: Figure 2
【課題】HFレーダは電離層における反射などによって距離が数100km〜4000kmと遠方を探査することが可能であることを特徴とするが、方位(角度)分解能を高めるためにレーダビーム幅を狭める場合、例えば15MHzのレーダ波であればアンテナ開口長が100m以上のアレイアンテナ設備が必要になるという問題があった。【解決手段】本発明は合成開口処理技術により、大きなアレイアンテナ設備を用いなくても分解能を向上することができる船舶搭載型レーダにおいて、船体の横揺れ縦揺れにより、受信エコーの位相変動が発生し、計算誤差を生ずるが、本発明では揺れ検知器の検知量に相当する位相を回転させることにより、前記誤差を小さくすることを特徴とするものである。【選択図】図2
SHIP-MOUNTED HF RADAR
船舶搭載型HFレーダ
2021-09-30
Patent
Electronic Resource
Japanese
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