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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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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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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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The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
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Accurate Localization in Acoustic Underwater Localization Systems.

Gianni Cario1, Alessandro Casavola1, Gianfranco Gagliardi1

  • 1Dipartimento di Ingegneria Elettronica, Informatica e Sistemistica (DIMES), Universitá della Calabria, 87036 Rende (CS), Italy.

Sensors (Basel, Switzerland)
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Summary

Simulations reveal key error sources impacting underwater localization accuracy. Statistical analysis helps optimize parameters for improved positioning system performance, particularly for Short Baseline (SBL) systems.

Keywords:
acoustic rangingerror analysisextended kalman filterpositioning systemstranspondersunderwater localization

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Area of Science:

  • Marine engineering
  • Robotics
  • Navigation systems

Background:

  • Underwater localization systems face accuracy challenges due to various error sources.
  • Accurate positioning is critical for many subsea operations and research.

Purpose of the Study:

  • To identify and quantify error sources affecting underwater localization accuracy.
  • To analyze the influence of these errors on Extended Kalman Filter (EKF) based positioning.
  • To optimize design parameters for Short Baseline (SBL) systems.

Main Methods:

  • Utilizing a virtual environment to simulate acoustic underwater localization systems.
  • Performing statistical analysis to characterize error sources and their impact.
  • Investigating the effects of modifying design parameters like baseline length and sensor errors (GPS, IMU).

Main Results:

  • Identified significant parameters influencing position estimates in SBL systems.
  • Demonstrated the effectiveness of statistical analysis in understanding error propagation.
  • Showcased how parameter tuning can enhance the accuracy of underwater positioning.

Conclusions:

  • Statistical analysis is crucial for designing accurate underwater localization systems.
  • Optimizing specific design parameters can significantly improve the performance of SBL positioning.
  • Simulation-based analysis provides valuable insights for real-world system enhancement.