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

Errors in Global Positioning System01:26

Errors in Global Positioning System

407
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,...
407
Circular Orbits and Critical Velocity for Satellites01:16

Circular Orbits and Critical Velocity for Satellites

5.7K
The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
5.7K
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

713
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,...
713
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

364
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...
364
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

3.6K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
3.6K
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

433
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...
433

You might also read

Related Articles

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

Sort by
Same author

Tailoring the Work Function of Oxyhalide Solid Electrolytes via Sulfur Doping to Boost High-Performance All-Solid-State Lithium Batteries.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Atomic-Layer Thinning of Bismuth Oxide Confers Antireduction Stability and Tunable Protonation Pathway in CO<sub>2</sub>-to-Formate Electrocatalysis.

ACS nano·2026
Same author

A Space-Based Autonomous Timekeeping Method Based on Onboard Atomic Clocks and Inter-Satellite Measurements.

Sensors (Basel, Switzerland)·2026
Same author

Prediction of BDS-3 Satellite Clock Bias Based on the Mamba-LSTM Model.

Sensors (Basel, Switzerland)·2026
Same author

MOOC-Empowered Blended Teaching Mode in Human Anatomy: A Structural Equation Modeling Analysis.

Clinical anatomy (New York, N.Y.)·2026
Same author

Generative Artificial Intelligence-driven orthodontic education practices.

BMC medical education·2026
Same journal

RETRACTED: Zhang et al. A Novel Framework for Reconstruction and Imaging of Target Scattering Centers via Wide-Angle Incidence in Radar Networks. <i>Sensors</i> 2025, <i>25</i>, 6802.

Sensors (Basel, Switzerland)·2026
Same journal

Enhancing Unsupervised Multi-Source Domain Adaptation for Person Re-Identification via Mixture of Experts and Graph-Based Relation.

Sensors (Basel, Switzerland)·2026
Same journal

Development of an Instrumented Glove for Palmar Pressure Assessment in Kayakers.

Sensors (Basel, Switzerland)·2026
Same journal

Development and Experimental Validation of an Autonomous IoT-Based Monitoring System for Real-Time Water Quality Assessment in the Amazon River.

Sensors (Basel, Switzerland)·2026
Same journal

Semi-Supervised Adversarial Learning Framework for Controller Area Network Bus Intrusion Detection.

Sensors (Basel, Switzerland)·2026
Same journal

Smart Optimization Method for Safety Signs in Innovative Manufacturing Environments Integrating Industrial Field IoT Sensors and Knowledge Graphs.

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

Related Experiment Video

Updated: Mar 29, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

7.4K

High-Precision Time Synchronization and Autonomous Maintenance for LEO Satellite Constellations Based on

Lei Mu1,2, Xiaogong Hu1, Mengjie Wu1

  • 1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China.

Sensors (Basel, Switzerland)
|March 28, 2026
PubMed
Summary
This summary is machine-generated.

This study presents a novel autonomous time synchronization method for Low Earth Orbit (LEO) constellations using crystal oscillators. It achieves precise synchronization without external references, crucial for LEO satellite networks.

Keywords:
Kalman filteringLEO satellite time synchronizationautonomous timekeepingfrequency drift predictiontemperature sensor compensation

More Related Videos

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

3.6K
Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
07:42

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

3.6K

Related Experiment Videos

Last Updated: Mar 29, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

7.4K
Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

3.6K
Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
07:42

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

3.6K

Area of Science:

  • Space engineering
  • Satellite technology
  • Network synchronization

Background:

  • Large-scale Low Earth Orbit (LEO) constellations necessitate autonomous time synchronization.
  • Existing methods often rely on expensive atomic clocks or Global Navigation Satellite System (GNSS) signals, posing cost and power challenges.
  • A low-cost, low-power, autonomous solution is critical for LEO constellation operations.

Purpose of the Study:

  • To propose and validate an autonomous time synchronization method for LEO constellations.
  • To enable high-precision time synchronization using only high-stability crystal oscillators.
  • To eliminate the need for onboard atomic clocks or external GNSS timing references.

Main Methods:

  • Development of a satellite-to-ground link visibility time model based on orbital parameters.
  • Construction of a discrete state-space model including temperature-induced frequency perturbation compensation.
  • Application of a combined Kalman filtering and Linear Quadratic Regulator (LQR) control framework for synchronization and maintenance.

Main Results:

  • Achieved time synchronization performance better than 5 ns (1σ) and peak-to-peak error below 30 ns in simulations.
  • Demonstrated effectiveness under a Walker-Delta constellation configuration at 800 km altitude and 55° inclination.
  • Validated the method's suitability for typical LEO constellation applications requiring precise timing.

Conclusions:

  • The proposed method offers a high-precision, autonomous time synchronization solution for LEO constellations.
  • It meets the stringent timing requirements for applications like communication scheduling and critical infrastructure services.
  • The decentralized nature and local time signal output make it ideal for large-scale satellite networks.