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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...
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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

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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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Magnetic Declination01:19

Magnetic Declination

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Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...
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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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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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Related Experiment Video

Updated: Mar 28, 2026

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
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Towards a Decentralized Magnetic Indoor Positioning System.

Zakaria Kasmi1, Abdelmoumen Norrdine2, Jörg Blankenbach3

  • 1Institute for Computing in Civil Engineering & Geo Information Systems, Rheinisch-Westfälische Technische Hochschule Aachen University, Mies-van-der-Rohe-Str. 1, Aachen 52074, Germany. zkasmi@gia.rwth-aachen.de.

Sensors (Basel, Switzerland)
|December 23, 2015
PubMed
Summary
This summary is machine-generated.

Decentralized magnetic indoor localization processes data on mobile stations, enhancing energy efficiency. This system synchronizes magnetic fields for standalone operation, enabling communication-free applications like locating firefighters.

Keywords:
DS3234RIOT-OSRTCTDMAarchitectureembedded systemperiodic tasksreal timereal-time clocksynchronization

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Area of Science:

  • Robotics and Automation
  • Wireless Communication Systems
  • Sensor Networks

Background:

  • Traditional indoor positioning relies on centralized data processing, leading to high energy consumption and communication overhead.
  • Mobile stations (MS) often require constant connection to a base station for data transmission and analysis.
  • Existing systems face limitations in energy efficiency and operational lifetime for MS.

Purpose of the Study:

  • To present a complete architecture and implementation of a decentralized magnetic indoor localization system.
  • To introduce a novel technique for synchronizing observed and artificial magnetic fields on the MS.
  • To enable communication-free indoor positioning for enhanced energy efficiency and extended MS lifetime.

Main Methods:

  • Developed a decentralized architecture processing magnetic data directly on the mobile station (MS).
  • Implemented a synchronization technique using real-time clocks (RTCs) and a preemptive operating system.
  • Enabled stand-alone control of magnetic field coils and assignment of measured magnetic fields on the MS.

Main Results:

  • Achieved decentralized magnetic indoor localization by processing data directly on the MS.
  • Demonstrated successful synchronization of observed and artificial magnetic fields for standalone operation.
  • Validated the potential for increased energy efficiency and prolonged MS lifetime.

Conclusions:

  • Decentralized magnetic indoor localization offers a viable solution for energy-efficient positioning.
  • The proposed synchronization method facilitates communication-free operation, crucial for remote applications.
  • This technology has significant potential for deployment in critical scenarios like rescue operations.