共查询到19条相似文献，搜索用时 156 毫秒
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GPS／INS直接定向精度分析 总被引：1，自引：0，他引：1
近年来，GPS／INS融合技术在国内逐渐被应用于航空摄影测量中，利用其直接获得外方位元素，从而减少外业控制点。通过试验，在DMC数码相机同高精度的GPS／INS系统联结下，直接获取了试验区的外方位元素，并对GPS／INS数据直接定向的精度进行分析和总结，得出了一些有益的结论。 相似文献
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通过自动寻星进行天文测量前需要概略定向。基于地磁定向高效、可靠的测量特点,提出在天文观测前利用地磁测量快速获得概略方位的方法。研究了地磁定向的使用条件,介绍了利用TCM-XB三轴罗盘定向的基本原理,测试了磁传感器的磁定向精度,进行了磁传感器与天文测量仪器实验平台组合设计。基于地磁与经纬仪的组合实验测试表明,在不同方向磁传感器定向最大互差约为1°,其固定方向定向内符合优于0.1°,可以满足基于视频全站仪/经纬仪的天文测量系统概略寻星要求。 相似文献
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通过详实的试验及充分的数据分析,本文展示了POS辅助航空摄影测量技术中集成传感器定向法在1∶10000中小比例尺内业空三加密作业中切实可行.文章POS的应用和IMU/GPS辅助航空摄影应用于测绘生产具有较好的参考作用. 相似文献
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通过详实的试验及充分的数据分析,本文展示了POS辅助航空摄影测量技术中集成传感器定向法在1∶10000中小比例尺内业空三加密作业中切实可行。文章POS的应用和IMU/GPS辅助航空摄影应用于测绘生产具有较好的参考作用。 相似文献
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GPS／INS组合系统应用于航空摄影测量时可以直接给出相机曝光瞬间的外方位元素，从而部分乃至全部地摆脱传统摄影测量对地面控制点的依赖。本文主要介绍GPS／INS组合系统的工作原理及特点，以及GPS／INS组合系统辅助航空摄影测量与遥感的国内外应用现状。 相似文献
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机载三线阵CCD摄影测量系统是GPS/INS与三线阵CCD相机联合工作的测量系统.通过GPS/INS给出的投影中心位置、视准轴姿态观测值及三线阵CCD像空间坐标,可以直接计算地面点在物空间的坐标.介绍了直接解算的几何模型,并依据共线方程建立地面点像空间坐标与控制点或同名点物空间坐标的关系,从而把问题归结为间接平差,给出了平差的误差方程.最后对直接解算模型进行了精度分析. 相似文献
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LiDAR(Light Detection and Ranging)系统是一种能够直接快速且高精度获取DSM(数字表面模型)数据的激光探测及测距系统,从功能上讲,LiDAR是一种集激光,全球定位系统(GPS)和惯性导航系统(INS)三种技术于一身的系统,也就是将定位及定向测量相结合的激光测量系统.本文主要介绍了我公司通过实验生产,获取及预处理机载激光LIDAR RIEGL LMS-Q1560扫描系统点云数据的方法. 相似文献
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ADS 80航空摄影测量系统的特点与应用 总被引：1，自引：0，他引：1
高立 《测绘与空间地理信息》2011,(6):212-214
仪器设备状况是航空摄影测量技术发展水平的标志。徕卡ADS 80基于航天传感器线阵扫描和全球定位系统、高精度的惯性导航定向系统（IMU）获取数字影像,利用该传感器进行航空摄影,不需经过扫描,就可以直接为数字摄影测量、遥感图像处理系统提供高分辨率的全色、真彩色、近红外数字影像,能够实现DLG数据的快速采集。与以往基于像对的... 相似文献
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Georeferencing is one of the most important tasks in photogrammetry. Traditionally it has been achieved indirectly using the well-known method of aerial triangulation. With the availability of integrated GPS and inertial measurement units (IMU), this situation changed. Direct determination of exterior orientation is now possible. Today, direct and integrated sensor orientation is used for a wide range of sensors including lidar and SAR, as well as for digital line scanner systems and aerial cameras. This paper investigates the performance of direct and integrated sensor orientation for large scale mapping using the data-set of the 'Integrated Sensor Orientation' test of the European Organisation for Experimental Photogrammetric Research (OEEPE—now known as EuroSDR). The concept, potential, problems and solutions of direct and integrated sensor orientation are discussed. 相似文献
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在传统解析空中三角测量理论的基础上,运用数字摄影测量、数字图像处理、误差处理等理论,用VC＋＋开发自动空中三角测量程序的主要功能,并用本程序对一个实验测区进行空中三角测量处理,对实验结果做了分析,最后实践证明,利用GPS/IMU数据辅助空中三角测量,能达到较高的自动化程度。 相似文献
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遥感影像目标实时定位的关键是外方位元素的实时获取,在航空遥感平台上加载GPS/INS组合导航系统能够满足这一需求.文中首先给出了基于GPS/INS系统的目标直接定位方法;然后从摄影测量的角度,重点推导了影像内外方位元素对目标定位的误差传递公式;并运用实例验证了公式的有效性. 相似文献
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在提出单历元解算GPS模糊度技术的基础上 ,使用INS间接法误差模型 ,提出了一种GPS双差载波相位多普勒 /INS全组合Kalman滤波的新方法 ,高精度直接解算机载TLS中的外方位元素。仿真数据试验表明 ,其姿态精度高于 1 0″,位置精度高于 1 0cm。 相似文献
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A GPS-aided Inertial Navigation System (GAINS) is used to determine the orientation? position and velocity of ground and aerial vehicles. The data measured by Inertial Navigation System (INS) and GPS are commonly integrated through an Extended Kalman Filter (EKF). Since the EKF requires linearized models and complete knowledge of predefined stochastic noises? the estimation performance of this filter is attenuated by unmodeled nonlinearity and bias uncertainties of MEMS inertial sensors. The Attitude Heading Reference System (AHRS) is applied based on the quaternion and Euler angles methods. A moving horizon-based estimator such as Model Predictive Observer (MPO) enables us to approximate and estimate linear systems affected by unknown uncertainties. The main objective of this research is to present a new MPO method based on the duality principle between controller and observer of dynamic systems and its implementation in AHRS mode of a low-cost INS aided by a GPS. Asymptotic stability of the proposed MPO is proven by applying Lyapunov’s direct method. The field test of a GAINS is performed by a ground vehicle to assess the long-time performance of the MPO method compared with the EKF. Both the EKF and MPO estimators are applied in AHRS mode of the MEMS GAINS for the purpose of real-time performance comparison. Furthermore? we use flight test data of the GAINS for evaluation of the estimation filters. The proposed MPO based on both the Euler angles and quaternion methods yields better estimation performances compared to the classic EKF. 相似文献
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GNSS/INS组合导航系统定位精度分析 总被引：1，自引：0，他引：1
GNSS/INS组合导航系统近年来得到了快速发展,应用领域越来越广泛。组合导航的定位精度是一个重要的研究方向,本文将应用于航空遥感领域的高精度GNSS/INS组合导航系统放置在地面平台上,采集试验数据,通过与NRTK定位结果比较,对组合导航系统定位精度进行分析,得出GNSS/INS组合导航系统的定位精度可达到厘米级的试验结论。 相似文献
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Dong-Hwan Hwang Sang Heon Oh Sang Jeong Lee Chansik Park Chris Rizos 《GPS Solutions》2005,9(4):294-311
Due to their complementary features of GPS and INS, the GPS/INS integrated navigation system is increasingly being used for
a variety of commercial and military applications. An attitude determination GPS (ADGPS) receiver, with multiple antennas,
can be more effectively integrated with a low-cost IMU since the receiver gives not only position and velocity data but also
attitude data. This paper proposes a low-cost attitude determination GPS/INS integrated navigation system. The proposed navigation
system comprises an ADGPS receiver, a navigation computer unit (NCU), and a low-cost commercial MEMS IMU. The navigation software
includes a fault detection and isolation (FDI) algorithm for integrity. In order to evaluate the performance of the proposed
navigation system, two flight tests have been performed using a small aircraft. The first flight test confirmed the fundamental
operation of the proposed navigation system and the effectiveness of the FDI algorithm. The second flight test evaluated the
performance of the proposed navigation system and demonstrated the benefit of GPS attitude information in a high dynamic environment.
The flight test results show that the proposed ADGPS/INS integrated navigation unit gives reliable navigation performance
even when anomalous GPS data is provided and gives better navigation performance than a conventional GPS/INS unit. 相似文献