Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Errors in Global Positioning System

Errors in Global Positioning System

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,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Reversible coma and elevated central venous pressure: warning signs of acute superior vena cava graft thrombosis following Warden procedure: a case report.

BMC anesthesiology·2026

Same author

SRSF1/Mcl-1 Axis Drives Apoptosis Evasion and Shapes the Immune Microenvironment to Promote Gastric Cancer Progression.

Human mutation·2026

Same author

Application and Molecular Modification of Enzyme in Textile Degumming.

Applied biochemistry and biotechnology·2026

Same author

Nonlinear compensation using a robust neural network for noisy samples in a high-speed coherent optical transceiver.

Optics express·2026

Same author

Triple-valve replacement in repaired tetralogy of fallot patients with mirror-image dextrocardia: a case report.

Journal of cardiothoracic surgery·2026

Same author

Technical Approach for Structural Analysis of an Unknown Compound in Huoxiang Zhengqi Oral Liquid based on Linear Ion Trap Mass Spectrometry.

Journal of visualized experiments : JoVE·2026

Same journal

Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising.

Optics express·2026

Same journal

Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics.

Optics express·2026

Same journal

Polarization-encoded coaxial structured light for high-precision 3D surface profilometry.

Optics express·2026

Same journal

Discrete freeform optical design based on collaborative optimization of point cloud and local normals.

Optics express·2026

Same journal

Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing.

Optics express·2026

Same journal

Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass.

Optics express·2026

See all related articles

Search research articles

Related Experiment Video

Updated: May 1, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Improved location algorithm for multiple intrusions in distributed Sagnac fiber sensing system.

He Wang, Qizhen Sun, Xiaolei Li

|April 11, 2014

Summary

This summary is machine-generated.

A novel twice-Fast Fourier Transform (FFT) algorithm accurately locates single and multiple intrusions in Sagnac sensing systems. This method achieves high precision for distributed sensing over long distances.

More Related Videos

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Related Experiment Videos

Last Updated: May 1, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Area of Science:

Optoelectronics
Signal Processing
Distributed Sensing

Background:

Distributed Sagnac sensing systems are crucial for detecting intrusions.
Accurate multi-point intrusion localization remains a challenge in these systems.

Purpose of the Study:

To propose and demonstrate an improved algorithm for multi-point intrusion location in distributed Sagnac sensing.
To enhance the accuracy and efficiency of intrusion detection and localization.

Main Methods:

A second Fast Fourier Transform (FFT) is applied to the phase signal's frequency spectrum.
Gaussian fitting and peak response frequency searching are used to determine intrusion location.
The twice-FFT algorithm is experimentally validated on a 41km sensing system.

Main Results:

The twice-FFT algorithm achieves a location error of less than 100m for single intrusions.
The algorithm successfully demonstrates locating capabilities for simultaneous two or three-point intrusions.
Stable and accurate intrusion position calculation is achieved.

Conclusions:

The twice-FFT algorithm offers an effective solution for multi-point intrusion localization in distributed Sagnac sensing.
This method significantly improves the precision and reliability of intrusion detection systems.
The algorithm's performance is validated across various intrusion scenarios and locations.