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

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

153
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...
153
Errors in Global Positioning System01:26

Errors in Global Positioning System

84
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,...
84
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

101
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...
101
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

82
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...
82
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

115
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,...
115
Geoid and Ellipsoid01:28

Geoid and Ellipsoid

86
The Earth's shape is best described as an ellipsoid, a slightly flattened sphere created by rotating an ellipse around its minor axis. This flattening results in the polar axis being about 21 kilometers shorter than the equatorial axis. In contrast, the geoid represents the Earth's gravitational shape and aligns with the mean sea level (MSL). The geoid is an irregular equipotential surface where gravity is perpendicular at every point. Variations in Earth's mass distribution cause geoid...
86

You might also read

Related Articles

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

Sort by
Same author

NLOS Multipath Classification of GNSS Signal Correlation Output Using Machine Learning.

Sensors (Basel, Switzerland)·2021
See all related articles

Related Experiment Video

Updated: Aug 10, 2025

Video Movement Analysis Using Smartphones ViMAS: A Pilot Study
07:51

Video Movement Analysis Using Smartphones ViMAS: A Pilot Study

Published on: March 14, 2017

16.9K

Precise Position Estimation Using Smartphone Raw GNSS Data Based on Two-Step Optimization.

Taro Suzuki1

  • 1Future Robotics Technology Center, Chiba Institute of Technology, Chiba 2750016, Japan.

Sensors (Basel, Switzerland)
|February 11, 2023
PubMed
Summary

This study introduces a novel method for precise smartphone Global Navigation Satellite System (GNSS) positioning. The technique achieves decimeter-level accuracy by optimizing velocity and position estimation separately, outperforming existing methods.

Keywords:
GNSSGPSlocalizationsmartphonetime-differenced carrier phase

More Related Videos

Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

903
Author Spotlight: An Alternative Approach to Protein Quantification by Bradford Assay Using a Smartphone
07:41

Author Spotlight: An Alternative Approach to Protein Quantification by Bradford Assay Using a Smartphone

Published on: September 8, 2023

3.8K

Related Experiment Videos

Last Updated: Aug 10, 2025

Video Movement Analysis Using Smartphones ViMAS: A Pilot Study
07:51

Video Movement Analysis Using Smartphones ViMAS: A Pilot Study

Published on: March 14, 2017

16.9K
Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

903
Author Spotlight: An Alternative Approach to Protein Quantification by Bradford Assay Using a Smartphone
07:41

Author Spotlight: An Alternative Approach to Protein Quantification by Bradford Assay Using a Smartphone

Published on: September 8, 2023

3.8K

Area of Science:

  • Geomatics Engineering
  • Satellite Navigation Systems
  • Mobile Sensing

Background:

  • Smartphone Global Navigation Satellite System (GNSS) observations are inherently noisy due to antenna limitations, hindering conventional high-precision positioning.
  • Environments with GNSS signal shielding, such as tunnels and urban canyons, introduce data outliers and availability issues crucial for accurate positioning.

Purpose of the Study:

  • To develop a high-precision positioning method for smartphones using raw GNSS data, specifically addressing noise and outlier challenges.
  • To achieve decimeter-level positioning accuracy in the Google Smartphone Decimeter Challenge (GSDC) by leveraging factor graph optimization.

Main Methods:

  • A two-step factor graph optimization (FGO) approach was employed, separating velocity and position estimation.
  • Velocity was initially estimated from Doppler observations, with outlier exclusion and interpolation.
  • Position was subsequently estimated using time-differenced carrier phase (TDCP) with the optimized velocity as a constraint.

Main Results:

  • The proposed method achieved a final horizontal positioning accuracy of 1.229 meters.
  • This accuracy secured first place in the Google Smartphone Decimeter Challenge (GSDC).

Conclusions:

  • The developed two-step FGO method effectively mitigates noise and outliers in smartphone GNSS data.
  • The approach demonstrates the feasibility of achieving high-precision positioning using readily available smartphone sensors.