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Developing an Innovative High-precision Approach to Predict Medium-term and Long-term Satellite Clock Bias

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Journal of Geodesy and Geoinformation Science 2023年第1期6卷 47-58页

作者： Xu WANG hongzhou chai School of Resources and Civil Engineering Liaoning Institute of Science and TechnologyBenxi117004China Institute of Geospatial Information Information Engineering UniversityZhengzhou 450001China

A new prediction method based on the nonlinear autoregressive model is proposed to improve the accuracy of medium-term and long-term predictions of Satellite Clock Bias(SCB).Forecast experiments for three time periods were implemented based on the precision SCB published on the International GNSS Server(IGS)*** results show that the medium-term and long-term prediction accuracy of the proposed approach is significantly better compared to other traditional models,with the training time being much shorter than the wavelet neural network model.

关键词： Satellite Clock Bias(SCB) Median Absolute Deviation(MAD) wavelet threshold nonlinear autoregressive model

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初建海洋测绘课程的探索与体会

中国现代教育装备 2024年第1期 165-168页

作者：范昊鹏柴洪洲范雕中国人民解放军战略支援部队信息工程大学河南郑州450001

介绍了测绘工程专业背景下建设海洋测绘课程的起步过程,着重从教法和学法两个角度阐述了课堂组织形式,提出了“问题引导+课程关联引导+实操引导+反馈引导”的讲授方法;围绕海洋测绘课程的建设过程进行总结,并从宏观和微观两个层面分析... 详细信息

介绍了测绘工程专业背景下建设海洋测绘课程的起步过程,着重从教法和学法两个角度阐述了课堂组织形式,提出了“问题引导+课程关联引导+实操引导+反馈引导”的讲授方法;围绕海洋测绘课程的建设过程进行总结,并从宏观和微观两个层面分析了建设中产生的一些问题。

关键词：海洋测绘海测装备学科建设

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AUV海上GNSS数据质量分析与定位评估

海洋测绘 2024年第1期44卷 43-47页

作者：向民志柴洪洲白腾飞杜祯强靳凯迪战略支援部队信息工程大学地理空间信息学院河南郑州450001

水下自主航行器(AUV)逐渐走向智能化、自主化、模块化和多功能化,已得到越来越广泛的关注和发展,然而关于AUV在海上环境的GNSS数据质量和定位性能尚不清楚。基于2022年8月天津滨海新区塘沽海面实测AUV数据,从可见卫星数、信噪比、数据... 详细信息

水下自主航行器(AUV)逐渐走向智能化、自主化、模块化和多功能化,已得到越来越广泛的关注和发展,然而关于AUV在海上环境的GNSS数据质量和定位性能尚不清楚。基于2022年8月天津滨海新区塘沽海面实测AUV数据,从可见卫星数、信噪比、数据完整性、伪距噪声和多路径效应5个方面对AUV海上GNSS数据质量进行分析,并对定位性能进行评估。结果表明:AUV的GNSS数据质量主要受到海上风浪和多路径的影响,卫星信号频繁中断,数据完整性较低,伪距噪声和多路径效应显著。AUV海上RTK的固定率为76.6%,伪距单点定位水平方向有96.83%的误差分布在2 m之内。

关键词：全球导航卫星系统海洋环境水下自主航行器质量分析动态定位

Signal quality analysis and quality check of BDS3 Precise Point Positioning in the Arctic Ocean

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Acta Oceanologica Sinica 2022年第2期41卷 166-179页

作者： Xiaoguo Guan hongzhou chai Guorui Xiao Zhenqiang Du Wenlong Qi Xueping Wang College of Urban and Environmental Sciences Xuchang UniversityXuchang 461000China Institute of Geospatial Information Information Engineering UniversityZhengzhou 450001China Department of Civil Engineering Henan Vocational College of Water Conservancy and EnvironmentZhengzhou 450001China

This study analyzes the signal quality and the accuracy of BeiDou 3 rd generation Satellite Navigation System(BDS3) Precise Point Positioning(PPP) in the Arctic Ocean. Assessment of signal quality of BDS3 includes signal to noise ratio(SNR), multipath(MP), dilution of precision(DOP), and code-minus-carrier combination(CC). The results show that, 5 to 13 satellites are visible at any time in the Arctic Ocean area as of September 2018, which are sufficient for positioning. In the mid-latitude oceanic region and in the Arctic Ocean, the SNR is 25–52 dB Hz and the MP ranges from-2 m to 2 m. As the latitude increases, the DOP values show large variation, which may be related to the distribution of BDS satellites. The CC values of signals B1 I and BIC range from-5 m to 5 m in the mid-latitude sea area and the Arctic Ocean, which means the effect of pseudorange noise is small. Moreover, as to obtain the external precise reference value for GNSS positioning in the Arctic Ocean region is difficult, it is hard to evaluate the accuracy of positioning results. An improved isotropy-based protection level method based on Receiver Autonomous Integrity Monitoring is proposed in the paper, which adopts median filter to smooth the gross errors to assess the precision and reliability of PPP in the Arctic Ocean. At first, the improved algorithm is verified with the data from the International GNSS Service Station Tixi. Then the accuracy of BDS3 PPP in the Arctic Ocean is calculated based on the improved algorithm. Which shows that the kinematic accuracy of PPP can reach the decimeter level in both the horizontal and vertical directions, and it meets the precision requirements of maritime navigation.

关键词： BDS3 Arctic Ocean signal quality analysis protection level quality check Precise Point Positioning satellite navigation

Study on the detection of abnormal sounding data based on LS-SVM

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Acta Oceanologica Sinica 2010年第6期29卷 115-120页

作者： HUANG Xianyuan ZHAI Guojun SUI Lifen chai hongzhou Institute of Surveying and Mapping Information Engineering University Zhengzhou 450052 China Naval Institute of Hydrographic Surveying and Charting Tianjin 300061 China

A new method of detecting abnormal sounding data based on LS-SVM is *** theorem proves that the trend surface filter is the especial result of *** order to depict the relationship of trend surface filter and LS-SVM,a contrast is *** example shows that abnormal sounding data could be detected effectively by LS-SVM when the training samples and kernel function are reasonable.

关键词： LS-SVM trend surface filter kernel function abnormal sounding data

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GNSS/SINS/视觉导航鲁棒算法

南京信息工程大学学报（自然科学版） 2024年第1期16卷 114-119页

作者：李明柴洪洲郑乃铨信息工程大学地理空间信息学院郑州450001

全球导航卫星系统(Global Navigation Satellite System, GNSS)、捷联惯性导航系统(Strapdown Inertial Navigation System, SINS)和视觉传感器优势互补,3者信息融合可获得高精度、无漂移的导航定位信息.针对GNSS/SINS/视觉融合导航易... 详细信息

全球导航卫星系统(Global Navigation Satellite System, GNSS)、捷联惯性导航系统(Strapdown Inertial Navigation System, SINS)和视觉传感器优势互补,3者信息融合可获得高精度、无漂移的导航定位信息.针对GNSS/SINS/视觉融合导航易受运动速度、光照变化、遮挡等影响导致定位精度和鲁棒性降低问题,本文在图优化框架的代价函数中加入SoftLOne鲁棒核函数,设置量测值粗差检验程序,降低离群点带来的负面影响.进一步,对量测值计算残差进行卡方检验,对超限残差降权处理,提高系统精度和鲁棒性.实验结果表明,本文算法较不施加鲁棒核函数、不采用异常值剔除策略和卡方检验的传统算法,以及加入其他鲁棒核函数的算法精度更高、鲁棒性更好,能够较大程度提升GNSS/SINS/视觉导航定位精度和鲁棒性,在大尺度环境下,未出现较大漂移误差,绝对位姿均方根误差0.735 m,绝对位姿误差标准差0.336 m.

关键词：全球导航卫星系统捷联惯性导航系统视觉鲁棒算法卡方检验

A novel method corrected multipath error oriented the oceanic buoy

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A novel method corrected multipath error oriented the oceani...

第十三届中国卫星导航年会

作者： Xiangyu Tian hongzhou chai Institute of Surveying and Mapping Information Engineering University

The signals always form the reflection over the sea. The characteristics and correct method of the multipath over the sea are worthy of research. Based on the assumption that the high-precision posterior residual only contains multipath error and noise, this paper adopts forward and backward filtering estimation and PPP-AR strategy to obtain the high-precision observational post-residual and then calculates the multipath error effect based on the mean denoising method. The azimuth and elevation angle mapping relationship of the azimuth angle and elevation angle are constructed, the station center multipath hemispherical map（MHM） is constructed, and the different grid resolutions of MHM are experimentally studied. The experimental results show that the MHM model can effectively improve the positioning effect of the marine buoy rather than no multipath correction. Not only the positioning accuracy can be improved, but the ambiguity fixed-rate and convergence time of positioning can also be improved, especially the 2°×2° resolution of the MHM model has good results in both static and dynamic scenarios.

关键词： BDS oceanic buoy multipath precise positioning

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基于量子照明的导航测距方案

光学学报 2023年第1期43卷 244-255页

作者：惠俊柴洪洲中国人民解放军战略支援部队信息工程大学地理空间信息学院河南郑州450001

针对以往脉冲纠缠测距方案对光子损耗十分敏感的特点及量子干涉法测距中利用光路延迟测距时难以实现远距离传输的问题,利用量子压缩效应来提升时延估计精度,同时还提出一种基于量子照明原理的非经典纠缠导航测距方案,对目标存在的回波... 详细信息

针对以往脉冲纠缠测距方案对光子损耗十分敏感的特点及量子干涉法测距中利用光路延迟测距时难以实现远距离传输的问题,利用量子压缩效应来提升时延估计精度,同时还提出一种基于量子照明原理的非经典纠缠导航测距方案,对目标存在的回波信号进行统计判断,从而确定距离参数。在相干探测的基础上,分别研究了相干态、热态和压缩态等3种高斯量子态的统计特性,并对量子照明测距方案中经典相干态与双模压缩真空态的信号检测性能进行了理论分析和数值模拟实验。结果表明,相较于传统测距方法,利用量子信号压缩和纠缠特性的方法能有效提高导航测距的距离分辨率,性能上优于经典方案,且在噪声光子数较多时具有更强的抗环境干扰能力。

关键词：量子光学无线电导航量子照明量子纠缠压缩态脉冲测距

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卫星钟差预报的T-S模糊神经网络法

测绘学报 2020年第5期49卷 580-588页

作者：王旭柴洪洲王昶信息工程大学地理空间信息学院河南郑州450001 辽宁生态工程职业学院测绘工程学院辽宁沈阳110101 辽宁科技大学土木工程学院辽宁鞍山114051

结合钟差数据的特点,提出了一种基于变化率的T-S模糊神经网络(TSFNN)钟差预报模型。首先计算相邻历元间钟差的变化率值并对其进行建模;然后利用TSFNN模型预报钟差变化率值,再将预报的变化率值还原,得到钟差预报值;最后,通过算例将本文... 详细信息

结合钟差数据的特点,提出了一种基于变化率的T-S模糊神经网络(TSFNN)钟差预报模型。首先计算相邻历元间钟差的变化率值并对其进行建模;然后利用TSFNN模型预报钟差变化率值,再将预报的变化率值还原,得到钟差预报值;最后,通过算例将本文所建模型与IGU-P产品、二次多项式模型(QP)及灰色模型(GM(1,1))进行试验对比。结果表明:在使用变化率方法后,TSFNN模型预报的精度和稳定性分别提高了69.8%和76.3%,而且与IGU-P钟差产品相比,预报的精度高出约10倍,同时模型预报的效果优于两种常用模型。因此,该模型可以实现卫星钟差较高精度的预报。

关键词：卫星钟差 T-S模糊神经网络变化率预报