Related Experiment Video
Updated: May 14, 2025
07:14
Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
Published on: May 1, 2018
7.7K
Multi-GNSS Large Areas PPP-RTK Performance During Ionosphere Anomaly Periods
Zhu Wang1,2, Guangbin Yang1, Rui Huang3
1School of Geography & Environmental Science, Guizhou Normal University, Guiyang 550001, China.
Sensors (Basel, Switzerland)
|April 12, 2025
Summary
Ionospheric anomalies significantly degrade Global Navigation Satellite Systems (GNSS) Precise Point Positioning with real-time kinematic (PPP-RTK) services, increasing convergence times and reducing positioning accuracy. Performance improves with more satellite systems, despite ionospheric disruptions.
Area of Science:
- Geodesy and Geomatics
- Space Weather and Ionospheric Physics
- Satellite Navigation Systems
Background:
- Precise Point Positioning with real-time kinematic (PPP-RTK) is crucial for high-accuracy GNSS applications.
- Existing research often overlooks PPP-RTK performance during ionospheric anomalies, such as those during thunderstorms.
- Ionospheric disturbances significantly impact GNSS signal propagation and positioning accuracy.
Purpose of the Study:
- To analyze the performance degradation of PPP-RTK under ionospheric active conditions.
- To quantify the impact of ionospheric anomalies on uncalibrated phase delay (UPD) residuals, atmospheric modeling, and positioning accuracy.
- To evaluate the effect of increased satellite constellations (GPS, Galileo, BDS) on PPP-RTK resilience during ionospheric disturbances.
Main Methods:
- Analysis of 13-day GNSS data from 305 Australian stations, including ionospheric anomaly and calm periods.
- Evaluation of wide-lane and narrow-lane UPD residuals and atmospheric delay estimation accuracy.
- Assessment of PPP-RTK positioning accuracy and convergence times for GPS-only, GPS + Galileo, and GPS + Galileo + BDS solutions.
Main Results:
- Ionospheric anomalies decreased UPD accuracy by up to 2.4% and degraded ionospheric/tropospheric delay estimates by 167.1% and 17.3%, respectively.
- PPP-RTK convergence times increased significantly (25.0%-87.2%) and positioning accuracy declined (5.5%-18.5%) during anomalies, varying with satellite constellation.
- Increased satellite systems improved positioning performance, but degradation due to ionospheric activity remained substantial.
Conclusions:
- Ionospheric anomalies severely disrupt PPP-RTK services by degrading ionospheric delay estimates, impacting positioning results.
- While ionospheric disturbances degrade performance, utilizing more satellite systems enhances PPP-RTK resilience.
- This study provides critical insights into PPP-RTK behavior during adverse ionospheric conditions, highlighting the need for robust algorithms.
Related Concept Videos
01:26Errors in Global Positioning System
23
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,...
23
01:30Types of Global Positioning System Surveys
42
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...
42
01:30Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
16
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...
16
01:28Field Application of Global Positioning System
19
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...
19
01:15Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
180
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
180
01:12Double Resonance Techniques: Overview
154
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
154