CAJ | 학술논문

依据观测数据给出沿海地区低层大气湍流的季节及日变化特征,以误码率、角跟踪精度以及调制传递函数和分辨率等作为衡量包括光通信设备、光电探测设备以及光电跟踪系统在海洋大气湍流环境下的性能指标,在局地均匀、各向同性Kolmogolov湍流谱以及Rytov近似假设的条件下进行了分析.结果表明:以误码率指标衡量,光通信系统的有效作用距离大大缩短;在中等湍流强度下,光电成像探测设备的湍流受限MTF及分辨率与系统的衍射受限MTF及分辨率相比存在着显著的差异,海洋大气湍流对短波、中波红外成像设备的影响已经大于衍射受限的影响,而对于长波的影响并不显著;在中等湍流强度下,相位起伏引起的角跟踪误差将从几微弧度上升到二十几微弧度.
의거관측수거급출연해지구저층대기단류적계절급일변화특정,이오마솔、각근종정도이급조제전체함수화분변솔등작위형량포괄광통신설비、광전탐측설비이급광전근종계통재해양대기단류배경하적성능지표,재국지균균、각향동성Kolmogolov단류보이급Rytov근사가설적조건하진행료분석.결과표명:이오마솔지표형량,광통신계통적유효작용거리대대축단;재중등단류강도하,광전성상탐측설비적단류수한MTF급분변솔여계통적연사수한MTF급분변솔상비존재착현저적차이,해양대기단류대단파、중파홍외성상설비적영향이경대우연사수한적영향,이대우장파적영향병불현저;재중등단류강도하,상위기복인기적각근종오차장종궤미호도상승도이십궤미호도.
The seasonal and diurnal variation characteristics of atmospheric turbulence of maritime surface boundary layer were presented based on the observation data.With the performance index consisting of BER,angle tracking error,MTF and resolution,the atmospheric turbulence was analyzed under the Rytov approximation and suitable assumptions of isotropic Kolmogolov spectrum in turbulence.The analysis results show that under the environment of typical marine mmosphefic turbulence,the effective distance of optical communication equipment shortens greatly when measured by BER;the application of optical communication equipment is strictly restricted under the moderate intensity marine turbulence,the MTF and resolution of optical turbulence limitation are significantly different from the data diffraction limited for photoelectric imaging detection equipment under the moderate intensity marine optical turbulence,the influence of marine atmospheric turbulence on SWIR and MWIR imaging equipment is more than diffraction limitation,and the influence on the LWIR imaging equipment shall be ignored.In the moderate intensity,the phase fluctuation induced angle tracking error ranges from several micro-radian to more than two dozen rnicro-radian.