High Frequency Ionospheric Propagation Phenomena.

Abstract

PROJECT BRIGHAM was a Department of Defense data collection effort wherein 890 kHz wide samples of the HF spectrum were acquired using a 25 Hz sampling rate with 2.8 kHz resolution for a period of up to 2.4 minutes. The main thrust of this paper has been the visual examination of the data on a graphics display with the idea of identifying drastic and unexpected changes in either individual signals or the entire wavefront; those changes being due, at least in part, to signal transformation resulting from various ionospheric phenomena. In addition, an in-depth statistical study was conducted on several of the specific signals with the hope of aiding in the formulation of an algorithm to efficiently automate the receiving system's sensitivity settings. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1976
Accession Number
ADA039355

Entities

People

  • Richard Robert Rowe

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Attenuation
  • Capillary Electrophoresis
  • Computer Programs
  • Computers
  • Data Sets
  • Databases
  • Discontinuities
  • Frequency
  • Ionosphere
  • Ionospheric Propagation
  • Plastic Explosives
  • Statistical Algorithms
  • Statistics
  • Three Dimensional
  • Two Dimensional
  • United States

Readers

  • Computational Modeling and Simulation
  • Research Science/Academic Research
  • Space/Atmospheric Physics.