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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

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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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Adjusting a Traverse01:12

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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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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...
20
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

26
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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Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

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Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
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Area Computation by the Alternative Coordinate Method01:24

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The alternative coordinate method, also known as the Shoelace Formula, is a technique for determining the area of a traverse using Cartesian coordinates. This method relies on the sequential arrangement of x and y coordinates for each point of the shape, ensuring accuracy and ease of application.In this approach, each corner's x and y coordinates are listed as fractions, with the x-coordinate as the numerator and the y-coordinate as the denominator. These coordinates are arranged sequentially...
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基于消除坐标参数和殖民地算法的GPS相位整数模糊性解析.

Ning Liu1, Shuangcheng Zhang1, Xiaoli Wu2

  • 1College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China.

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|January 25, 2025
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概括
此摘要是机器生成的。

本研究介绍了一种通过提高整数模两可的分辨率来实现全球导航卫星系统 (GNSS) 高精度定位的新方法. 这种新的方法提高了确定整数模糊性的成功率,这对于准确的定位应用至关重要.

关键词:
乔莱斯基的分解卡尔曼过器可以过.在QR分解转换过程中,殖民地算法 殖民地算法它们的关系处理.整数模两可的情况

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科学领域:

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

背景情况:

  • 高精度的全球导航卫星系统 (GNSS) 定位依赖于准确地解决整数模两可.
  • 使用双差异模型的传统方法通常会因有限数据的坐标参数估计而增加不良位置和较低的成功率.
  • 这就需要改进的算法来实现可靠的整数模两可的解决方案.

研究的目的:

  • 提出一种新的整数模两可的解决方法,可以消除坐标参数,并使用群算法.
  • 为了提高GNSS高精度定位的整数模糊性固定的成功率和可靠性.
  • 用现实世界GPS数据与传统技术对拟议的方法进行验证.

主要方法:

  • 通过QR分解转换从观察方程中消除坐标参数.
  • 使用卡尔曼波器估计模两可的参数,以获得浮液溶液.
  • 使用连续的乔莱斯基分解,对浮液的脱关系.
  • 用殖民地算法搜索最佳整数模两可.

主要成果:

  • 拟议的方法证明了对模两可的参数的良好对比效应.
  • 使用静态和动态GPS数据的实验结果证实了该方法能够正确有效地解决整数模糊性的能力.
  • 与最小平方和LAMBDA方法的比较表明,在固定成功率方面表现优越.

结论:

  • 这种新方法有效地通过解坐标和模两可参数来解决整数模两可的问题.
  • 结合卡尔曼过,乔莱斯基分解和群优化,为高精度的GNSS定位提供了强大的解决方案.
  • 这一进步有助于GNSS技术的更可靠和更准确的应用.