基于WGS-84椭球的改进海洋耀斑计算模型与仿真分析  

Improved Sun Glint Computational Model Based on WGS-84 Ellipsoid and Simulation Analysis

作　　者：戴春杰 周爱明[2] 杨溢[1] 张冬冬[1] Dai Chunjie;Zhou Aiming;Yang Yi;Zhang Dongdong(Key Laboratory of Infrared System Detection and Imaging Technologies,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;Shanghai Institute of Satellite Engineering,Shanghai 200240,China)

机构地区：[1]中国科学院上海技术物理研究所红外探测与成像技术重点实验室,上海200083 [2]上海卫星工程研究所,上海200240

出　　处：《激光与光电子学进展》2023年第20期25-31,共7页Laser & Optoelectronics Progress

摘　　要：卫星载荷在海洋上探测温室气体时,为获得高精度的气体浓度数据,采用海洋耀斑观测模式,因此实时耀斑位置的准确计算是获得高精度有效数据的必要前提。提出了基于最优线搜索的改进海洋耀斑计算模型,根据WGS-84椭球模型,在二分法搜索满足镜面反射耀斑点要求的基础上,采用最优化中线搜索的思想对算法进行改进,使其更好地符合耀斑点共面条件。经仿真分析,与卫星工具包(STK)仿真结果对比,所提改进模型计算的耀斑位置距离误差显著降低至90 m。The sun glint observation mode is adopted when a satellite payload detects greenhouse gases over the ocean to obtain high-precision gas concentration data.Therefore,accurately calculating the real-time sun glint position is a prerequisite for obtaining high-precision data.An improved sun glint calculation model based on an optimal line search is proposed.According to the WGS-84 ellipsoid model,on the basis of dichotomy searching to meet the requirements of specular reflective speckles,the algorithm is improved by using the idea of optimal line search to better meet the coplanar condition of the sun glint.Compared with the simulation results of the Satellite Tool Kit(STK),the sun glint position distance error calculated by the improved model is significantly reduced to 90 m.

关 键 词：海洋耀斑 温室气体 WGS-84椭球 二分法 线搜索 

分 类 号：O436[机械工程—光学工程]