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Related Concept Videos

Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

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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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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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Errors in Global Positioning System01:26

Errors in Global Positioning System

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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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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

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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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Introduction to Global Positioning System01:30

Introduction to Global Positioning System

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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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Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

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A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
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Related Experiment Video

Updated: Jun 15, 2025

Using Pharmacological Manipulation and High-precision Radio Telemetry to Study the Spatial Cognition in Free-ranging Animals
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Technical note: assessing GPS sensor accuracy using real-time kinematic device for livestock tracking.

Biquan Zhao1,2, Rebecca L McDermott1, Galen E Erickson1

  • 1Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA.

Journal of Animal Science
|August 27, 2024
PubMed
Summary
This summary is machine-generated.

Commercial GPS sensors show variable accuracy for livestock tracking, ranging from 2.46 to 11.06 meters. Evaluating sensor positioning accuracy is crucial for reliable livestock behavior and health monitoring.

Keywords:
cattle trackingglobal positioning systemsgrazing managementpositioning accuracyprecision livestock management

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Area of Science:

  • Animal Science
  • Ecology
  • Geomatics Engineering

Background:

  • Global Positioning System (GPS) sensors are increasingly used for livestock tracking, aiding in monitoring behavior, distribution, and health.
  • Interpreting livestock behavior from GPS data is challenging due to inherent positioning inaccuracies.
  • Accurate positioning data is essential for determining grazing densities and identifying abnormal movement patterns.

Purpose of the Study:

  • To assess the positioning accuracy of three commercial GPS sensor types for livestock tracking.
  • To compare the accuracy of different GPS sensors using a survey-grade real-time kinematics (RTK) device.
  • To provide essential data for improving the reliability of GPS in livestock research and management.

Main Methods:

  • Evaluated three commercial GPS sensor types against a survey-grade real-time kinematics (RTK) device.
  • Detailed the procedures and equations used for accuracy assessment.
  • Compared recorded GPS locations with RTK-derived reference locations.

Main Results:

  • Statistically significant differences (P < 0.05) in positioning accuracy were found between GPS sensor types.
  • Circular Error Probable (CEP) at 95% probability levels (CEP95) ranged from 2.46 to 11.06 meters.
  • Accuracy varied significantly among individual sensors and across different brands.

Conclusions:

  • The positioning accuracy of commercial GPS sensors for livestock tracking is variable and brand-dependent.
  • Evaluating individual GPS sensor accuracy is critical for reliable livestock monitoring and data interpretation.
  • Findings are vital for animal scientists, ecologists, and producers utilizing GPS technology.