摘要
紧跟国际卫星测高反演和水下组合导航的最新热点,以满足中国迫切提出的科学和国防需求为导向,介绍了基于GNSS-R卫星海面测高原理提高水下惯性/重力组合导航精度研究进展。第一,介绍了GNSS-R测高精度研究进展、GNSS-R测高沿轨迹空间分辨率研究进展、GNSS-R反射点轨迹间空间分辨率研究进展、基于卫星测高反演海洋重力场研究进展、水下重力匹配导航研究进展等。第二,在GNSS-R海面测高方面,提出了新型大地水准面静态高程镜面反射点修正定位法、海洋潮汐时变高程镜面反射点修正定位法、法向投影镜面反射点修正定位法、GNSS-R星载下视天线接收信噪比模型构建法、GNSS-R星载下视天线可用镜面反射点筛选算法等,旨在提高卫星测高精度和空间分辨率;在水下重力匹配导航方面,提出了新型主成分加权平均归一化法、测地线周期性航向控制法、分层邻域阈值搜索法、先验递推迭代最小二乘误匹配修正法等,旨在提高水下重力匹配导航精度、匹配效率及可靠性。第三,预期提出新型二阶不动点时延提取法,旨在提高GNSS-R卫星海面测高精度;预期提出新型反射信号分解法,旨在提高GNSS-R卫星海面测高沿轨迹空间分辨率;预期提出新型海面粗糙度误差校正法,旨在提高GNSS-R卫星海面测高轨迹间空间分辨率;预期提出新型正则化稳健算法,旨在提高海洋重力场反演精度和空间分辨率;预期融合星载GNSS-R模拟测高数据、岸/空基GNSS-R验证测高数据等多源信息,联合几何配准收敛速度快和直接概率准则定位精度高的优点,构建新型几何配准-直接概率准则混合法,旨在提高水下惯性/重力组合导航精度和速度。
The research progress in improving the accuracy of the underwater inertial/gravity integrated navigation based on the principle of the new generation of the GNSS-R constellations altimetry is introduced by following closely the latest hotspot of the international GNSS-R satellite altimetry recovery and underwater integrated navigation,and in order to meet the urgent requirements for the science and national defense.Firstly,some research progresses are introduced,such as the GNSS-R altimetry precision,the GNSS-R along-track spatial resolution,the GNSS-R trajectories spatial resolution,the marine gravity field recovery based on satellite altimetry,and the underwater gravity matching navigation.Secondly,for the GNSS-R satellite altimetry,a series of specular point positioning methods have been proposed,including the geoid static-state elevation correction,the ocean tidal time-varying elevation correction,the normal projection correction,the GNSS-R nadir antenna receiving SNR model,and the available specular point filtering method,which aim to improve the spatial resolution and accuracy of the sea surface altimetry.For the underwater gravity matching navigation,some new methods have been proposed,including the new principal component weighted average normalization method,the geodesic-based method,the hierarchical neighborhood threshold method,the priori recursive iterative least squares mismatch correction method,etc,in order to improve the accuracy,matching efficiency,and reliability of underwater gravity matching navigation.Thirdly,the new two-order fixed-point time-delay extraction method will be proposed,aiming to improve the measurement accuracy of the sea surface height by GNSS-R satellite.The new reflection signal decomposition method will be proposed in order to improve the along-track spatial resolution of the GNSS-R satellite altimetry.The new calibration method of surface roughness error will be proposed for the sake of improving the trajectories spatial resolution of the GNSS-R satellite altimetry.The new
作者
郑伟
李钊伟
吴凡
ZHENG Wei;LI Zhao-wei;WU Fan(Qian Xuesen Laboratory of Technology,China Academy of Space Technology,Beijing 100094,China;Big Data Institute,Taiyuan University of Technology,Jinzhong 030600,China;School of Geomatics,Liaoning Technical University,Fuxin 123000,China;School of Surveying and Landing Information Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China;School of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;School of Aeronautics and Astronautics,University of Electronic Science and Technology of China,Chengdu 611731,China;College of Instrument Science and Engineering,Southeast University,Nanjing 210096,China)
出处
《科学技术与工程》
北大核心
2019年第36期21-36,共16页
Science Technology and Engineering
基金
国家自然科学基金面上项目(41574014,41774014)
国防科技创新特区钱学森空间技术实验室创新工作站项目
中央军委科技委前沿科技创新项目
中国空间技术研究院杰出青年人才基金资助
