卫星轨道设计辅助火星中分辨率影像仿真  

Mars Moderate Resolution Image Simulation Aided by Satellite Orbit Design

作　　者：王可 白林泽 WANG Ke;BAI Linze(School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China;School of Earth Sciences,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]武汉大学遥感信息工程学院,湖北武汉430079 [2]浙江大学地球科学学院,浙江杭州310058

出　　处：《地理空间信息》2024年第10期9-13,共5页Geospatial Information

摘　　要：提出了一种由卫星轨道根数计算影像外方位元素,进行中分辨率影像仿真的策略。首先设定卫星在短时间内的若干组飞行状态,由轨道动力学的定轨问题确定卫星的轨道根数。其次,由轨道根数计算影像的外方位元素,并进行影像仿真,通过光线追踪原理和火星全球DEM修正高程迭代计算,实现逐像素点的地面点精确定位。最终对火星全球影像数据重采样获得感兴趣区域的仿真影像。实验表明,该方法可顾及航向和旁向重叠度的要求,利用真实数据获得长时间段内感兴趣区域的多组仿真影像,为探测项目前期验证卫星轨道和相机参数提供支持。In this paper,we proposed a simulation strategy which calculated the exterior orientations of simulation images from satellite orbital elements and then simulated Mars moderate resolution images.Firstly,we determined satellite orbital elements from the boundary value problem of aerodynamics by setting several initial states of the satellite’s flight in a short period of time.And then,we calculated exterior orientation of each simulation image based on orbital elements,used ray-tracing principle in graphics and the corrected elevation calculated iteratively with Mars global DEM data to precisely locate ground points pixel by pixel.Finally,we obtained simulation image of region of interest by resampling from real Mars global image data.Experimental results show that this method can obtain multiple Mars simulation images of the region of interest over a long period of time,taking into account the requirements of side and fore-and-aft overlaps,which can support the verification of satellite orbits and camera parameters in the early stages of the detection project.

关 键 词：火星 影像仿真 中分辨率 卫星轨道设计 卫星成像模型 

分 类 号：P237[天文地球—摄影测量与遥感]