Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Azimuths and Bearings01:19

Azimuths and Bearings

237
Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...
237
Adjusting a Traverse01:12

Adjusting a Traverse

110
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
110
Errors in Global Positioning System01:26

Errors in Global Positioning System

117
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,...
117
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

133
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
133
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

125
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...
125
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

96
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...
96

You might also read

Related Articles

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

Sort by
Same author

Information Geometry-Based Two-Stage Track-Before-Detect Algorithm for Multi-Target Detection in Sea Clutter.

Entropy (Basel, Switzerland)·2025
Same author

The Geometry of Generalized Likelihood Ratio Test.

Entropy (Basel, Switzerland)·2022
Same author

Spectral-Based SPD Matrix Representation for Signal Detection Using a Deep Neutral Network.

Entropy (Basel, Switzerland)·2020
Same author

PCA-Based Matrix CFAR Detection for Radar Target.

Entropy (Basel, Switzerland)·2020
Same author

Matrix Information Geometry for Spectral-Based SPD Matrix Signal Detection with Dimensionality Reduction.

Entropy (Basel, Switzerland)·2020
Same author

Robust Covariance Estimators Based on Information Divergences and Riemannian Manifold.

Entropy (Basel, Switzerland)·2020
Same journal

Research on a Regional Availability Evaluation Model for Road-Area High-Entropy Energy Based on Synergy Factors.

Entropy (Basel, Switzerland)·2026
Same journal

Atmospheric Turbulence Channel Modeling and Performance Analysis of a CO-ZP-OFDM Coherent Optical Communication System for UAV Air-to-Ground Scenarios.

Entropy (Basel, Switzerland)·2026
Same journal

Information Geometry and Asymptotic Theory for SMML Estimators.

Entropy (Basel, Switzerland)·2026
Same journal

Correlation Entropy and Power-Law Kinetics.

Entropy (Basel, Switzerland)·2026
Same journal

Research on the Contagion of Systemic Financial Risk Under the Impact of Climate Risks-From the Perspective of Complex Networks and Machine Learning.

Entropy (Basel, Switzerland)·2026
Same journal

The Statistical-Mechanical Meaning of the Wave Function of Quantum Mechanics.

Entropy (Basel, Switzerland)·2026
See all related articles

Related Experiment Video

Updated: Sep 18, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

7.9K

An Information Geometry-Based Track-Before-Detect Algorithm for Range-Azimuth Measurements in Radar Systems.

Jinguo Liu1, Hao Wu1, Zheng Yang1

  • 1College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China.

Entropy (Basel, Switzerland)
|June 26, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel track-before-detect (TBD) method using information geometry (IG) for radar systems. The approach enhances weak moving target detection in clutter by integrating multi-frame data, improving signal-to-clutter ratio (SCR).

Keywords:
Kullback–Leibler divergencedynamic programminginformation geometrymulti-frame detectionrange-azimuth measurementstrack before detect

More Related Videos

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.6K
Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.6K

Related Experiment Videos

Last Updated: Sep 18, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

7.9K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.6K
Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.6K

Area of Science:

  • Radar Systems Engineering
  • Signal Processing
  • Information Geometry

Background:

  • Detecting weak moving targets in complex clutter is a persistent challenge in radar.
  • Existing track-before-detect (TBD) methods struggle with heterogeneous clutter backgrounds.
  • Information geometry (IG) offers a robust framework for detection in strong clutter.

Purpose of the Study:

  • To develop an advanced TBD method leveraging information geometry for improved target detection.
  • To enhance multi-frame detection capabilities by integrating information across sequential radar scans.
  • To address the challenge of weak moving target identification in challenging sea clutter environments.

Main Methods:

  • Modeling target and clutter trajectories on Hermitian positive definite (HPD) and power spectrum (PS) manifolds.
  • Utilizing Kullback-Leibler (KL) divergence as a geometric metric within an IG-based scoring function.
  • Implementing a dynamic programming (DP) framework with state transition constraints to maximize an integrated merit function for trajectory identification.

Main Results:

  • The proposed IG-based TBD method effectively integrates information across multiple frames.
  • Experimental validation on sea clutter datasets demonstrates a minimum 3 dB improvement in signal-to-clutter ratio (SCR).
  • The algorithm successfully identifies target trajectories by maximizing the devised integrated merit function.

Conclusions:

  • The novel IG-based TBD approach significantly enhances the detection of weak moving targets in heterogeneous clutter.
  • Inter-frame information integration within the TBD framework improves performance in challenging radar scenarios.
  • The method offers a substantial performance gain over traditional radar detection techniques.