激光引偏干扰中典型自然地物假目标的引偏能力
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摘要
针对自然地物假目标在激光引偏干扰中的应用需求,以有效引偏空域表征引偏能力,计算分析了其引偏能力。在充分考虑目标反射特性、干扰-指示激光强度和大气激光衰减系数等因素的前提下,利用信号压制系数K≥1的条件建立了假目标引偏能力分析模型,基于模型分析了典型条件下常见自然地物假目标的有效引偏空域。研究结果表明,假目标有效引偏空域与目标类型紧密相关,相同条件下植被类、砂石类和漫反射体目标的引偏能力依次增强;植被类和砂石类自然地物的引偏空域存在远小于漫射分量的镜像反射分量;干扰激光入射角的变化对有效引偏空域分布会产生较明显的影响,但对植被类目标,其引偏空域随入射角的变化却没有明显的趋势性变化规律。研究结果对于自然地物假目标的合理运用具有指导意义。
Aiming at the application of natural objects false target in laser decoy jamming, its deceiving ability characterized by decoy airspace was calculated and analyzed. On the premise of full considering the reflection characteristics of target, the intensity of jamming-indicating laser, atmospheric laser attenuation coefficient, and other factors, the analysis model of decoy jamming ability for false target was established under the condition of suppression coefficient K(≥1). Furthermore, the effectual decoy airspace of common natural objects was analyzed under typical condition. The results show that the effective cheating airspace of false target is closely related to the type of targets, and the deceiving ability of vegetation, gravel and diffuse reflection objects is enhanced in turn under the same conditions. There exists a mirror reflection component that is much smaller than the diffuse reflection component in the decoy airspace of vegetation and gravel natural objects, and the variation of the incident angle of jamming laser has obvious influence on the distribution of effectual decoy airspace. However, there is no obvious trend change rule for the decoy airspace of vegetation targets with the incidence angle. The research results are instructive for the reasonable application of typical natural objects used for false target.
Aiming at the application of natural objects false target in laser decoy jamming, its deceiving ability characterized by decoy airspace was calculated and analyzed. On the premise of full considering the reflection characteristics of target, the intensity of jamming-indicating laser, atmospheric laser attenuation coefficient, and other factors, the analysis model of decoy jamming ability for false target was established under the condition of suppression coefficient K(≥1). Furthermore, the effectual decoy airspace of common natural objects was analyzed under typical condition. The results show that the effective cheating airspace of false target is closely related to the type of targets, and the deceiving ability of vegetation, gravel and diffuse reflection objects is enhanced in turn under the same conditions. There exists a mirror reflection component that is much smaller than the diffuse reflection component in the decoy airspace of vegetation and gravel natural objects, and the variation of the incident angle of jamming laser has obvious influence on the distribution of effectual decoy airspace. However, there is no obvious trend change rule for the decoy airspace of vegetation targets with the incidence angle. The research results are instructive for the reasonable application of typical natural objects used for false target.
引文
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[3]Tong L P,Song D A.Research on selection of areas where natural objects serving as decoys in laser angle deception jamming[J].Journal of PLA Electronic Engineering Institute,2011,30(2):50?53.仝力鹏,宋德安.激光角度欺骗干扰中的自然地物假目标区域选择研究[J].中国人民解放军电子工程学院学报,2011,30(2):50?53.
[4]Sun C S,Zhang X H,Rao J H,et al.Layout of diffuse reflection board used for laser decoying[J].Laser&Infrared,2013,43(3):252?255.孙春生,张晓晖,饶炯辉,等.激光引偏干扰中漫反射板假目标的布设方法[J].激光与红外,2013,43(3):252?255.
[5]Sun C S,Zhang X H,Zhang S.Guarded angle of laser decoy in laser trick jamming[J].Laser&Infrared,2017,47(3):347?351.孙春生,张晓晖,张爽.激光引偏干扰中假目标的防护角与应用[J].激光与红外,2017,47(3):347?351.
[6]Feidenhans’l N A,Hansen P E,PilnyL,et al.Comparison of optical methods for surface roughness characterization[J].Measurement Science and Technology,2015,26:085208.
[7]Wen J G,Liu Q,Xiao Q,et al.Characterizing land surface anisotropic reflectance over rugged terrain:a review of concepts and recent developments[J].Remote Sensing,2018,10(3):370.
[8]Sun Z Q,Wu D,Zhao Y S.Improved kernel-driven semi-empirical bidirectional reflectance factor models for characterizing the reflection of vegetation covers:considering a specular kernel[J].Agricultural and Forest Meteorology,2018,260?261:95?108.
[9]Wu Z S,Xie D H,Xie P H,et al.Modeling reflectance function from rough surface and algorithms[J].Acta Optica Sinica,2002,22(8):897?901.吴振森,谢东辉,谢品华,等.粗糙表面激光散射统计建模的遗传算法[J].光学学报,2002,22(8):897?901.
[10]Torrance K E,Sparrow E M.Theory for off-specular reflection from roughened surfaces[J].Journal of the Optical Society of America,1967,57(9):1105-1114.
[11]Yang Y F,Wu Z S,Cao Y H.Practical six-parameter bidirectional reflectance distribution function model for rough surface[J].Acta Optica Sinica,2012,32(2):0229001.杨玉峰,吴振森,曹运华.一种实用型粗糙面六参数双向反射分布函数模型[J].光学学报,2012,32(2):0229001.
[12]Chen Y D,Zhang W A,Chen Y C,et al.Laser scattering characteristic of several object samples[J].Journal of Applied Optics,2011,32(6):1251?1256.陈玉丹,张维安,陈玉成,等.多类目标样片激光散射特性研究[J].应用光学,2011,32(6):1251?1256.
[13]Wang A X,Wu Z S.Parameter inversion of shadowing function in light scattering model[J].Infrared and Laser Engineering,2014,43(1):332?337.王安祥,吴振森.光散射模型中遮蔽函数的参数反演[J].红外与激光工程,2014,43(1):332?337.