摘要
探讨了机载综合孔径辐射计的技术参数与探测目标的最大探测距离之间的关系,推导了综合孔径辐射计微波辐射图像对比度的计算公式,给出了综合孔径辐射计探测目标最大距离的计算方法,研究了积分时间累积对探测距离的影响.以T型天线阵列为例,对机载综合孔径辐射计探测亮度温度对比度为200 K左右的金属目标的性能进行了分析,计算结果表明:该机载综合孔径辐射计能够以150 m/s的飞行速度探测到距离10 km远处半径为4 m的金属圆目标.
Relation between the parameter of synthetic aperture radiometer and maximum distance of detecting target was discussed. The formula for calculating the contrast of microwave radiation image from synthetic aperture radiometer was deduced. The method of computing the maximum distance of detecting target by synthetic aperture radiometer was presented. The influence of pixel average on distance of detecting target was analyzed. At last, performance of detecting metal targets of 200 K brightness temperature contrast by airborne synthetic aperture radiometer using T-shape antenna configuration was studied as an example. The results show that circular metal targets of a radius of 4 m can be detected by airborne synthetic aperture radiometer with a velocity of 150 m/s at distance of 10 km.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第10期59-62,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(60772090)
关键词
综合孔径辐射计
机载
图像对比度
灵敏度
目标探测
synthetic aperture radiometer
airborne
image contrast
sensitivity
target detection
