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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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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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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Related Experiment Video

Updated: Oct 30, 2025

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Radar Position Estimation by Sequential Irradiation of ESM Receivers.

Petr Hubáček1, Jiří Veselý1, Jana Olivová1

  • 1Department of Communication Technologies, Electronic Warfare and Radars, University of Defence in Brno, 66210 Brno, Czech Republic.

Sensors (Basel, Switzerland)
|July 2, 2021
PubMed
Summary

A new Inscribed Angle (InA) technique precisely locates 2D signal sources using rotating antennas and Electronic Support Measures (ESM) receivers. This method enhances target localization accuracy in Line of Sight (LOS) scenarios.

Keywords:
covariance matrixlocalization methodpositioning techniquetarget localization

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Area of Science:

  • Electromagnetics and Signal Processing
  • Navigation and Positioning Systems

Background:

  • Accurate 2D signal source localization is critical for various applications.
  • Existing methods may face limitations in dynamic environments or specific signal characteristics.

Purpose of the Study:

  • To introduce and describe a novel 2D signal source localization technique.
  • To provide a geometric representation and mathematical model for the proposed method.
  • To analyze the accuracy and performance of the new localization approach.

Main Methods:

  • The Inscribed Angle (InA) technique measures time differences of sequential target antenna irradiation.
  • Utilizes Electronic Support Measures (ESM) receivers and assumes a rotating target antenna with constant angular velocity.
  • Employs three time-synchronized sensors in a Line of Sight (LOS) environment; irradiation time linked to maximum Received Signal Strength (RSS).

Main Results:

  • A detailed description of the InA localization method, including geometric representation and model.
  • Analysis demonstrating the achievable accuracy of the InA positioning technique.
  • A derived method to enhance the accuracy of irradiation time estimation for improved positioning.

Conclusions:

  • The Inscribed Angle (InA) technique offers a viable new method for 2D signal source localization.
  • The method's performance and accuracy are validated through extensive simulations.
  • The InA technique shows promise for enhancing directional finding and target tracking capabilities.