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Related Concept Videos

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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Types of Global Positioning System Surveys01:30

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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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Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

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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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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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Local Attraction01:22

Local Attraction

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Local attraction refers to disturbances in compass readings caused by magnetic influences from nearby objects such as metal fences, buried pipes, vehicles, buildings, power lines, or natural iron ore deposits. Small items like wristwatches, steel tools, or belt buckles can also interfere with the compass by creating local magnetic fields that distort the Earth's natural magnetic field. These distortions lead to inaccurate readings, posing navigation and land surveying challenges.Local...
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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: Aug 2, 2025

Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells
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Spatial Multi-Source Information Fusion Localization Algorithm in Non-Line-of-Sight Environments.

Jianhui Wang1, Jingjing Li1, Weijia Cui1

  • 1National Digital Switching System Engineering & Technological Research Center, Zhengzhou 450001, China.

Sensors (Basel, Switzerland)
|April 13, 2023
PubMed
Summary

This study introduces a novel method for high-accuracy localization in complex non-line-of-sight (NLOS) environments by leveraging multiple NLOS paths. The approach enhances localization accuracy and reliability in challenging conditions.

Keywords:
information fusionlocalization accuracynon-line-of-sight (NLOS)propagation pathwireless localization

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Area of Science:

  • Signal Processing
  • Geospatial Information Systems
  • Wireless Communication

Background:

  • Accurate localization in complex environments with non-line-of-sight (NLOS) conditions remains a significant challenge.
  • Traditional methods often suppress NLOS paths, potentially limiting localization accuracy.

Purpose of the Study:

  • To develop and analyze a novel spatial multi-path array fusion localization model.
  • To improve localization accuracy and reliability in complex NLOS environments.

Main Methods:

  • A new localization method utilizing multiple NLOS paths.
  • An angle-of-arrival (AOA) and time-of-arrival (TOA) algorithm based on spatial multi-information fusion.
  • Integration of spatial signal multipath, multi-element antenna measurements, and geographic environment information.

Main Results:

  • The proposed algorithm effectively utilizes spatial multi-location information.
  • Demonstrated significant improvement in localization accuracy within NLOS environments.
  • Increased the probability of successful localization in complex environments.

Conclusions:

  • The developed spatial multi-path array fusion model and AOA/TOA algorithm enhance localization performance in challenging NLOS conditions.
  • The method offers a promising solution for complex environment localization applications.
  • Full utilization of spatial multi-location information is key to improving accuracy and reliability.