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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

22
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
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Types of Global Positioning System Surveys01:30

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GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
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Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

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Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
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Field Application of Global Positioning System01:28

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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
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Introduction to Global Positioning System01:30

Introduction to Global Positioning System

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The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
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多传感器协同定位仅在范围单个信标系统:一个差分的Chan-Gauss-Newton算法与序列数据融合.

Yun Ye1, Hongyang He1, Enfan Lin2

  • 1School of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China.

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|April 26, 2025
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概括

本研究引入了一种新的水下导航方法,用于使用单个信标和多个传感器的自动水下车辆 (AUV). 这种方法提高了定位准确度和速度,为AUV导航提供了具有成本效益的解决方案.

关键词:
斯·牛顿算法 斯·牛顿算法多个传感器多个传感器.水下航行水下航行水下虚拟信标 - - 水下虚拟信标

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 海洋学 海洋学 海洋学
  • 导航系统 导航系统

背景情况:

  • 自主水下车辆 (AUV) 的传统长基线 (LBL) 系统需要广泛的信标部署和校准.
  • 距离仅限单个信标 (ROSB) 定位提供了一个更有效的替代方案,但在公海环境中面临着弱观测和有限的先前数据的挑战.

研究的目的:

  • 开发一个强大而准确的AUV水下定位框架,使用单个信标和多传感器数据.
  • 解决现有 ROSB 方法在挑战性公海航行场景中的局限性.

主要方法:

  • 建立了一个多传感器水下虚拟信标定位框架.
  • 提出了一个差分的Chan-Gauss-Newton (DCGN) 方法,将惯性导航与单个信标范围测量和多普勒速度日志 (DVL) 和压力传感器的数据集成在一起.
  • 该方法利用多个假设来区分初始位置以提高准确性.

主要成果:

  • 拟议的DCGN方法显著提高了潜水车辆的定位精度和接近速度.
  • 模拟实验和湖泊测试验证了开发的本地化框架的高可靠性和性能.
  • 与传统方法相比,该系统表现出卓越的性能,减少了部署时间和工作量.

结论:

  • 采用DCGN方法的多传感器虚拟信标定位框架为AUV导航提供了高度准确和可靠的解决方案.
  • 这种方法为水下高精度导航应用提供了具有成本效益和效率的替代方案.
  • 这些发现对未来自动驾驶水下车辆的开发和部署有重大影响.