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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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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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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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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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Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

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Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
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Related Experiment Video

Updated: Sep 22, 2025

Electroantennography-based Bio-hybrid Odor-detecting Drone using Silkmoth Antennae for Odor Source Localization
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A Reasonable Alternative System for Searching UAVs in the Local Area.

Marek Češkovič1, Pavol Kurdel1, Natália Gecejová1

  • 1Faculty of Aeronautics, Technical University of Košice, Rampová 7, 041 21 Košice, Slovakia.

Sensors (Basel, Switzerland)
|May 20, 2022
PubMed
Summary

Locating downed professional drones is challenging. This study introduces the IDVOR system, using Doppler effect principles to determine a crashed Unmanned Aerial Vehicle's (UAV) direction, even in hostile environments.

Keywords:
UAVUAV trackingdroneinverse doppler VHF omnidirectional radio rangeposition indicator

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Area of Science:

  • Aerospace Engineering
  • Signal Processing
  • Navigation Systems

Background:

  • Professional Unmanned Aerial Vehicles (UAVs) operate in challenging environments, risking mission termination or loss.
  • Existing distress locating systems are unsuitable for specialized, high-value drones.
  • Locating crashed UAVs in unknown or hostile territories presents a significant operational challenge.

Purpose of the Study:

  • To propose an innovative terrestrial localization system for crashed professional UAVs.
  • To develop a direction-finding system independent of standard GPS or coordinate-based methods.
  • To enable UAV location in "enemy" or inhospitable territories using reserved frequencies.

Main Methods:

  • Design of a terrestrial localization system utilizing Doppler effect principles.
  • Processing and correlation of received distress signals.
  • Development of an innovative targeting system (IDVOR) based on VHF distress signal broadcasting.

Main Results:

  • The proposed IDVOR system successfully determines the direction of a crashed UAV.
  • The system operates independently of traditional positioning systems (e.g., GPS coordinates).
  • Effective localization is achieved even in challenging "enemy" or inhospitable territories.

Conclusions:

  • The IDVOR system offers a novel solution for locating high-value, specialized UAVs after a crash.
  • This Doppler-based approach provides crucial directional information in environments where standard navigation fails.
  • The system enhances UAV operational safety and recovery efficiency in critical scenarios.