探测海洋目标的光学遥感器工作波段选择

Waveband selection of optical remote sensor for detecting marine target

在遥感器的研制任务中。工作波段的选择对于目标探测和识别至关重要。针对海洋目标探测这种从大背景下探测小目标的应用，分析了限制目标探测的主要因素。以深海水域舰船目标为例，利用大气辐射传输模型MODTRAN4．0模拟计算了某型号遥感器在可见光谱区域内各个波段的目标／背景对比度和信噪比，并以此作为依据得出结论一以海洋目标探测为主要目的的宽波段遥感器的最佳工作波段为0．5～0．9μm。

For developing a remote sensor, the selection of operating waveband is one of the most important factors for detecting and identifying target. Aiming at detecting marine target from large area background, the major factors restricting target detecting were analyzed in this paper. By taking abyssal pelagic ship target as an example, the Signal to Noise Ratios（SNRs） and contrasts between target and background at different wavebands within visible/near infrared region were calculated using atmospheric radiative transfer code--MODTRAN 4.0, and experimental results show that the best waveband is from 0.5 μm to 0.9μm for wide waveband remote sensor aiming at marine target detecting.