以飞行实验中安装在同一个航空平台上的偏振扫描仪(POSP)和同时偏振相机(SIPC)为例,提出了一种对单幅SIPC图像及单扫描圈内POSP星下点邻近数据进行快速视场匹配的方法。通过POSP旋转扫描采集模式下的拖影权重系数模板,将高空间分辨率的SIPC数据重采样至与POSP空间分辨率一致,然后度量不同位置的SIPC重采样数据与POSP数据的一致性程度,选取一致性最强的位置作为视场匹配位置。最后通过多场景下数据相关性最高的SIPC像元相对序号,作为参考视场匹配位置,将多场景下分别计算的匹配位置与参考位置的平均绝对值误差作为视场匹配误差,约为10个SIPC像元,即0.12个POSP像元,满足应用需求。

Herein, using a particulate observing scanning polarimeter (POSP) and a simultaneous imaging polarization camera (SIPC) installed on the same aviation platform during a flight experiment as references, a method for fast field-of-view matching of a single SIPC image and POSP nadir point adjacent data in a single scanning circle was proposed. SIPC data with high spatial resolution were resampled to match the spatial resolution of POSP using the smear weight coefficient template in POSP rotation scan acquisition mode. Then, the consistency of SIPC resampling data and POSP data at different locations was measured, and the position with the highest consistency was selected as the field-of-view matching position. Finally, the SIPC pixel relative number with the highest data correlation in multiple scenes was used as the reference field-of-view matching position. Further, the mean absolute error of matching and reference positions calculated in multiple scenes was considered as the field-of-view matching error; this error was approximately 10 SIPC pixels, i.e., 0.12 POSP pixels, which meets the application requirements.