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Field Application of Global Positioning System01:28

Field Application of Global Positioning System

70
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...
70
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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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

101
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...
101
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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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,...
100
Passive Filters01:27

Passive Filters

562
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
562

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相关实验视频

Updated: Jul 24, 2025

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
04:13

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults

Published on: February 8, 2019

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在被动室内定位系统中的一些设计考虑因素

Jimmy Engström1,2, Åse Jevinger2, Carl Magnus Olsson2

  • 1Sony Europe B.V., 223 62 Lund, Sweden.

Sensors (Basel, Switzerland)
|July 8, 2023
PubMed
概括

使用客户端计算的被动室内定位系统可以提供准确的位置跟踪,而不会影响用户的隐私. 这些系统利用多边化和传感器融合,为传统的基于云计算的指纹采集方法提供了可行的替代方案.

关键词:
这就是BLE BLE BLE这就是RSSI.使用指纹进行指纹采集.室内定位装置 室内定位装置多边化的多边化.隐私 隐私 隐私 隐私 隐私 隐私

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Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
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Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band

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Methodology for Establishing a Community-Wide Life Laboratory for Capturing Unobtrusive and Continuous Remote Activity and Health Data
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Methodology for Establishing a Community-Wide Life Laboratory for Capturing Unobtrusive and Continuous Remote Activity and Health Data

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相关实验视频

Last Updated: Jul 24, 2025

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
04:13

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Published on: February 8, 2019

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Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
06:43

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band

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Methodology for Establishing a Community-Wide Life Laboratory for Capturing Unobtrusive and Continuous Remote Activity and Health Data
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Methodology for Establishing a Community-Wide Life Laboratory for Capturing Unobtrusive and Continuous Remote Activity and Health Data

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科学领域:

  • 计算机科学 计算机科学
  • 电气工程 电气工程
  • 地理学工程 工程地质学

背景情况:

  • 室内定位对于基于位置的服务至关重要,但由于信号色而面临挑战.
  • 目前的方法,如位置指纹,通常依赖于基于云计算的计算,引发隐私问题.
  • 用户隐私至关重要,需要探索替代定位策略.

研究的目的:

  • 调查被动室内定位系统与客户端计算的可行性.
  • 将被动系统的准确性和隐私影响与传统的指纹采集方法进行比较.
  • 确定客户端计算是否可以在不损害用户隐私的情况下实现准确的室内定位.

主要方法:

  • 开发和评估了两个被动室内定位系统:一个基于多边化,另一个使用与无气味卡尔曼波器 (UKF) 的传感器融合.
  • 将这些被动系统的性能与基于指纹的标准方法进行了比较.
  • 在繁忙的办公室环境中进行实验,以评估现实世界的适用性.

主要成果:

  • 被动室内定位系统在复杂的办公环境中证明了准确的位置确定.
  • 提出的客户端计算方法有效地解决了与服务器端处理相关的隐私问题.
  • 与UKF的多元化和传感器融合证明了被动室内定位的有效性.

结论:

  • 带有客户端计算的被动室内定位系统可以成功地取代传统的指纹方法.
  • 在不依赖基于云的服务器的情况下,可以实现准确且保护隐私的室内本地化.
  • 这项研究为开发安全高效的室内定位服务提供了有前途的方向.