CAJ | 학술논문

利用 Sasiele等提出的空间谱滤波技术，对两种典型应用场景下扩展信标非等晕性问题进行了建模，获得了扩展信标非等晕误差及其不同Zernike模式分量的理论公式。基于理论模型，分析了两种场景和典型湍流模式下扩展信标非等晕误差及其不同Zernike模式分量的特性，结果表明：信标扩展度与接收系统口径相同时，扩展与聚焦耦合非等晕方差最小，但扩展与聚焦耦合非等晕方差高阶项(去平移、倾斜和离焦)分量并非最小，高阶项分量最小时信标扩展尺度应小于接收系统口径；当信标扩展角与信标偏置角相当时，纯信标扩展非等晕方差约是纯角度非等晕方差的2.2%；相对湍流大气纯角度和纯聚焦非等晕方差，信标扩展导致的湍流大气非等晕是小量，多数情况下可不考虑。
이용 Sasiele등제출적공간보려파기술，대량충전형응용장경하확전신표비등훈성문제진행료건모，획득료확전신표비등훈오차급기불동Zernike모식분량적이론공식。기우이론모형，분석료량충장경화전형단류모식하확전신표비등훈오차급기불동Zernike모식분량적특성，결과표명：신표확전도여접수계통구경상동시，확전여취초우합비등훈방차최소，단확전여취초우합비등훈방차고계항(거평이、경사화리초)분량병비최소，고계항분량최소시신표확전척도응소우접수계통구경；당신표확전각여신표편치각상당시，순신표확전비등훈방차약시순각도비등훈방차적2.2%；상대단류대기순각도화순취초비등훈방차，신표확전도치적단류대기비등훈시소량，다수정황하가불고필。
Using a special spectral filtering method,the anisoplanatism of expanded beacon in two typical scenes is mod-elled.And the formulae that describe the total expanded anisoplanatic error and different Zernike model components are obtained. Using two typical turbulent outlines,the characteristics of the expanded anisoplanatic error are studied,and the results indicate that:when the dimension of beacon equals to that of the receiver aperture,the expanded and focal coupling anisoplanatic error is minimal,while the high-order components that the piston,tilt and focus components are removed are not minimal.When the high-order components are minimal,the dimension of beacon should be less than that of the receiver aperture.When the beacon expanded angle equals to beacon departure angle,the expanded anisoplanatic error is about 2.2% of the angle anisoplanatic error. Relative to the angle or focal anisoplanatic error,the anisoplanatic error induced by the dimension of beacon is very little.And in many scenes,it can be ignored.