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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

50
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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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,...
68
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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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...
53
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

64
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...
64
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

57
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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Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

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Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
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基于单向模糊时间信息的辅助GNSS定位算法.

Rundong Li1, Peng Wu1, Lu Feng1

  • 1College of Electronic Communication and Electrical Engineering, Changsha University, Changsha, 410022, China.

Heliyon
|October 9, 2023
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概括
此摘要是机器生成的。

本研究介绍了全球导航卫星系统 (GNSS) 接收器的新型定位算法. 它通过模糊的时间信息提高了准确性,即使在旋转过程中,也不会增加计算负载.

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科学领域:

  • 卫星导航 卫星导航 卫星导航 卫星导航
  • 地理学工程 工程地质学
  • 信号处理 信号处理

背景情况:

  • 传统的辅助定位算法在近似位置和时间数据的准确性方面存在局限性.
  • 当辅助信息超过精度要求时,会增加计算负载和潜在故障.

研究的目的:

  • 为GNSS接收器开发定位算法,克服传统方法的局限性,特别是在模糊时间条件下.
  • 提高卫星导航系统的定位精度和可靠性.

主要方法:

  • 建议基于单向模糊时间辅助的定位算法.
  • 使用短暂数据中的参考信息来搜索和验证近似时间信息.
  • 设计用于GNSS卫星导航接收器,运行时不准确的时间数据,例如在旋转期间.

主要成果:

  • 拟议的方法准确计算了确切的位置,尽管在近似位置信息中存在错误.
  • 在传统方法失败的旋转条件下成功实现定位.
  • 实现精确的定位结果,减少计算力度.

结论:

  • 一向模糊的时间辅助定位算法为GNSS接收器提供了一个实用的解决方案.
  • 它提高了定位准确性和稳定性,特别是在具有有限时间精度的具有挑战性的环境中.
  • 通过提高卫星导航系统性能而没有增加计算复杂性的显著工程价值.