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Related Concept Videos

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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

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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,...
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Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

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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...
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Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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Related Experiment Video

Updated: Sep 29, 2025

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
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Multi-GNSS Precise Point Positioning with UWB Tightly Coupled Integration.

Zhenchuan Huang1,2, Shuanggen Jin2,3,4, Ke Su2

  • 1School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China.

Sensors (Basel, Switzerland)
|March 26, 2022
PubMed
Summary
This summary is machine-generated.

Integrating multiple Global Navigation Satellite Systems (GNSSs) with ultra-wideband (UWB) technology enhances precise point positioning (PPP). This multi-GNSS/UWB approach improves accuracy and reduces convergence time, even during signal disruptions.

Keywords:
precise point positioning (PPP)tightly coupled integrationtime difference of arrival (TDOA)ultra-wideband (UWB)

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Area of Science:

  • Geomatics Engineering
  • Satellite Navigation Systems
  • Sensor Fusion

Background:

  • Global Navigation Satellite Systems (GNSSs) offer high-precision positioning but suffer from signal disruption in complex environments, leading to reduced accuracy and longer convergence times.
  • Single GNSS systems exhibit limitations in performance, especially under challenging signal conditions, impacting applications like autonomous driving and UAVs.

Purpose of the Study:

  • To develop and evaluate a tightly coupled multi-GNSS and ultra-wideband (UWB) precise point positioning (PPP) algorithm.
  • To demonstrate the capability of the integrated system for fast and precise navigation and positioning.

Main Methods:

  • Tightly integrating multi-GNSS data with ultra-wideband (UWB) technology to create a hybrid positioning solution.
  • Evaluating the algorithm's validity using a dataset comprising both GNSS and UWB measurements.
  • Simulating GNSS signal interruptions to analyze the convergence performance and robustness of the integrated solution.

Main Results:

  • Multi-GNSS/UWB integration significantly improves positioning accuracy and convergence time compared to single GNSS systems.
  • Performance enhancements are most notable in the north and east directions, with secondary improvements in the vertical direction.
  • The integrated GNSS/UWB solution demonstrates reliability and robustness during simulated GNSS signal interruptions.

Conclusions:

  • The tightly coupled multi-GNSS/UWB precise point positioning approach offers a substantial improvement in positioning accuracy and convergence speed.
  • This integrated system provides a more robust and reliable navigation solution, particularly in environments where GNSS signals are prone to disruption.