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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...
89
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

170
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...
170
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,...
112
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...
120
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...
120
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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相关实验视频

Updated: Sep 13, 2025

Electroantennography-based Bio-hybrid Odor-detecting Drone using Silkmoth Antennae for Odor Source Localization
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室内定位使用多蓝牙信标部署在稀疏的边缘计算环境中.

Soheil Saghafi1, Yashar Kiarashi1, Amy D Rodriguez2

  • 1Department of Biomedical Informatics, School of Medicine, Emory University, Atlanta, Georgia, USA.

Digital twins and applications
|July 30, 2025
PubMed
概括
此摘要是机器生成的。

使用蓝牙低能耗 (BLE) 信标优化室内定位可显著提高准确性. 使用三个BLE信标可以减少RF密集环境中的定位错误,额外的信标提供最小的收益.

关键词:
环境健康监测环境健康监测蓝牙低能耗 蓝牙低能耗云计算是云计算中的一个.边缘计算是一种边缘计算.室内局部化 室内局部化

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Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
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相关实验视频

Last Updated: Sep 13, 2025

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科学领域:

  • 工程 工程师 工程师 工程师
  • 计算机科学 计算机科学
  • 信号处理 信号处理

背景情况:

  • 蓝牙低能耗 (BLE) 提供具有成本效益和低功耗的室内定位解决方案.
  • 由于环境因素导致的收到信号强度指标 (RSSI) 变化挑战了BLE定位的准确性.
  • 广播频 (RF) 密集的现代建筑为室内定位提供了复杂的环境.

研究的目的:

  • 通过使用多个BLE信标来增强室内定位准确性的优化方法.
  • 为了评估信标数量对RF密集环境中的定位性能的影响.
  • 开发和发布一个开源的BLE本地化框架,以便更广泛地采用.

主要方法:

  • 利用多个BLE信标在现代建筑环境中进行室内定位.
  • 实施了一项概念验证研究,以评估本地化错误的减少.
  • 在Raspberry Pi设备的边缘网络上部署了本地化框架.

主要成果:

  • 通过使用三个BLE信标,定位错误从9.09米的最差距显著减少到2.94米.
  • 使用超过三个BLE信标,在定位准确度方面取得了微小的增量改进.
  • 开发的BLE本地化框架在边缘计算网络上成功实现.

结论:

  • 三个BLE信标是提高室内定位精度在高频密集环境中最优的.
  • BLE本地化框架的开源发布促进了更广泛的研究和应用.
  • 这种优化的方法解决了RSSI可变性挑战,使室内定位更可靠.