Analysis of the Effects of Ionospheric Sampling of Reflection Points Near-Path, for High-Frequency Single-Site-Location Direction Finding Systems

Abstract

This thesis suggests a method to estimate the current value of an ionospheric parameter. The proposed method is based on the known variability of the observed current values near path and utilizes data derived from ionospheric sampling measurements. Analysis of errors is provided in Single-Site-Location High-Frequency Direction Finding (SSL-HFDF), arising from ionospheric irregularities such as Es (sporadic E), ionospheric tilts, and traveling ionospheric disturbances (TIDs). The characteristics of Es, tilts and TIDs for mid-latitudes are summarized in tables. The spatial and temporal coherence of ionospheric variabilities and irregularities is analyzed over the electron density. Practical results, measurements, and studies are presented on SSL-HFDF. A survey of characteristics of the ionosphere in the equatorial region is also provided. Finally, some recommendations are given to maximize the applicability of the proposed method.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1990
Accession Number
ADA245950

Entities

People

  • Carlos A. Filho

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Angle Of Arrival
  • Direction Finding
  • Electron Density
  • Electrons
  • Engineering
  • Environment
  • Equatorial Regions
  • Frequency
  • Geography
  • Ionization
  • Ionosphere
  • Ionospheric Disturbances
  • Measurement
  • Multipath Transmission
  • Refraction
  • Refractive Index
  • Regions

Fields of Study

  • Environmental science

Readers

  • Regression Analysis.
  • Space/Atmospheric Physics.

Technology Areas

  • Microelectronics