首页|基于坡度检测与点密度自约束调整的LOLA地理定位误差校正

基于坡度检测与点密度自约束调整的LOLA地理定位误差校正

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月球轨道器激光高度计(Lunar Orbiter Laser Altimeter,LOLA)是目前月球探测中获取数据量最大、精度最高的激光高度计,可为其他月球产品提供地理控制.然而由于定轨不确定性和激光指向偏差,部分激光剖面存在地理定位误差.针对这些异常轨道数据,提出了 一种改进的激光自约束调整方法.首先基于坡度将与周围地形差异过大的激光剖面识别为异常轨,并使用其余轨道作为参考对其进行基于点密度的自约束轨道调整(根据参考点密度自动选取合适的调整策略),最后合并两类轨道数据并进行最终调整,再将其作为改正后的结果.交叉点分析结果表明,该方法能有效校正异常轨道,从而提升数据精度.
LOLA Geolocation Error Correction Based on Slope Detection and Point Density Self-Constraint Adjustment
The Lunar Orbiter Laser Altimeter(LOLA)is currently the largest and most accurate laser altim-eter in lunar exploration,which can provide geographical control for other lunar products.However,due to the uncertainty of orbit determination and laser direction deviation,there are geographic positioning errors on some laser profiles.In view of these abnormal orbit data,an improved laser self-constrained adjustment meth-od is proposed in this paper.Firstly,the laser profile that is too different from the surrounding terrain is iden-tified as an abnormal orbit based on the slope,and the other orbits are used as references for self-constrained orbit adjustment based on the point density(the appropriate adjustment strategy is automatically selected ac-cording to the reference point density).Finally,the two types of orbit data are merged and the final adjust-ment is made,and then it is used as the corrected result.The results of cross point analysis show that this method can effectively correct the anomalous orbit and improve the data accuracy.

lunarlaser altimetergeolocation errorself-constraint adjustment

杨瑞林、谢欢、刘小帅、奚源廷、晏雄锋、叶真、刘世杰、童小华

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同济大学测绘与地理信息学院,上海 200092

上海市航天测绘遥感与空间探测重点实验室,上海 200092

月球 激光高度计 地理定位误差 自约束调整

国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目上海市科技创新行动计划资助项目上海市科技创新行动计划资助项目航空航天飞行力学实验室资助项目上海市教委创新项目资助项目

4227145542221002423251062251110290021511103800KGJ61422101103052023ZKZD30

2024

10.3969/j.issn.1672-8785.2024.02.005

红外
中国科学院上海技术物理研究所

红外

影响因子：0.317
ISSN：1672-8785
年,卷(期)：2024.45(2)
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