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相关概念视频

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...
69
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,...
71
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,...
96
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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Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

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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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Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
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相关实验视频

Updated: Jul 23, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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评估GNSS定位系统的光学时钟性能

Enkhtuvshin Boldbaatar1, Donald Grant1, Suelynn Choy1

  • 1School of Science (Geospatial), RMIT University, Melbourne, VIC 3001, Australia.

Sensors (Basel, Switzerland)
|July 14, 2023
PubMed
概括
此摘要是机器生成的。

光学时钟在卫星导航中比原子时钟提供了更高的稳定性. 这些先进的时钟承诺在全球导航卫星系统 (GNSS) 应用中提供毫米以下的定位准确性和显著增强的定时性能.

关键词:
艾伦的偏差 艾伦的偏差在GNSS中使用GNSS.定位,导航和时间 (PNT)时钟稳定性分析光学时钟是指光学时钟.卫星原子钟 卫星原子钟

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科学领域:

  • 原子,分子和光学物理学
  • 地测和地球物理学的地质学.
  • 卫星技术 卫星技术 卫星技术

背景情况:

  • 原子钟对于定位,导航和定时 (PNT) 系统至关重要,包括全球导航卫星系统 (GNSS).
  • 新兴的光学时钟技术比传统的原子钟提供了显著更高的精度,不确定性达到1 × 10 - 18.

研究的目的:

  • 提供光学时钟技术的概述,其发展和特征.
  • 分析光学时钟与GNSS卫星原子钟的稳定性.
  • 讨论光学时钟在提高GNSS定位精度方面的潜力.

主要方法:

  • 使用现有文献数据对光学时钟的稳定性分析.
  • 在国际GNSS服务 (IGS) 时钟产品上使用重叠艾伦偏差 (ADEV) 方法估计GNSS卫星时钟稳定性.
  • 与利略卫星原子钟相比,光学时钟的性能比较.

主要成果:

  • 与目前在GNSS卫星中使用的原子钟相比,光学时钟的稳定性更高.
  • 光学时钟有可能在30秒内在GNSS定位中实现不到1毫米的距离误差.
  • 光学时钟可以在900秒后提供至少比利略原子钟更好的10倍的计时性能.

结论:

  • 光学时钟在PNT应用中比原子钟显著进步,提供了更高的稳定性和精度.
  • 虽然有前途,但光学时钟技术需要进一步开发,以满足航天器有效载荷的严格要求.
  • 将光学时钟集成到GNSS中可以彻底改变定位精度和定时性能.