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Errors in Global Positioning System01:26

Errors in Global Positioning System

38
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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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...
51
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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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: Jun 11, 2025

Author Spotlight: Demonstrating Systematic Endobronchial Ultrasound to New Endoscopists
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Spoofing attack recognition for GNSS-based train positioning using a BO-LightGBM method.

Jiaqi Bi1, Jiang Liu1,2, Baigen Cai1

  • 1School of Automation and Intelligence, Beijing Jiaotong University, Beijing, China.

Science Progress
|October 1, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a new method for detecting Global Navigation Satellite System (GNSS) spoofing attacks in train positioning systems (TPS). The developed Bayesian optimization-LightGBM model effectively identifies spoofing, enhancing train safety and operational integrity.

Keywords:
Railwaymachine learningrecognition modelspoofing attacktrain positioning system

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Area of Science:

  • * Focuses on cybersecurity and robust positioning systems for intelligent transportation.
  • * Integrates machine learning for real-time threat detection in critical infrastructure.

Background:

  • * Trustworthy train positioning is essential for operational control, with Global Navigation Satellite System (GNSS) being a key technology.
  • * GNSS spoofing attacks pose a significant threat to the reliability of train positioning systems (TPS).
  • * Existing research often overlooks the impact and recognition of spoofing attacks within GNSS-enabled TPS.

Purpose of the Study:

  • * To develop an effective spoofing recognition solution for active security protection in train positioning systems.
  • * To address the gap in current research by considering the influence and recognition of GNSS spoofing attacks.
  • * To enhance the trustworthiness of GNSS-based train positioning.

Main Methods:

  • * Designed novel features incorporating GNSS observation indicators and odometer-enabled parameters to reflect spoofing effects.
  • * Proposed a Bayesian optimization-light gradient boosting machine (BO-LightGBM) for spoofing recognition.
  • * Utilized a dedicated GNSS spoofing test platform and SimSAFE tool for data collection across various attack modes.

Main Results:

  • * The BO-LightGBM model demonstrated superior performance in recognizing GNSS spoofing attacks.
  • * The proposed solution showed adaptability to different spoofing attack scenarios.
  • * Comparative analysis confirmed the model's advantages over existing state-of-the-art strategies.

Conclusions:

  • * The developed BO-LightGBM approach offers an effective means for detecting GNSS spoofing in TPS.
  • * The method provides a robust solution for active security protection in train navigation.
  • * This research contributes to enhancing the reliability and security of GNSS-dependent transportation systems.