The Autoscaling of Oblique Ionograms,

Abstract

This report details the work done on developing an autoscaling system for the Low-Latitude Ionospheric Sounding Program (LLISP). The report firstly describes the performance of a number of different filtering routines for automatic cleaning of LLISP oblique ionograms. Secondly, it then presents techniques developed to automatically extract a feature vector from a filtered ionogram. A third stage uses the feature vectors to identify the prominent modes and other important features of the ionograms, and to track these modes and features as they evolve across sequences of ionograms. This work will automate the task of identifying and tracking ionospheric propagation modes in ionograms. The resulting system will be used to process current LLISP data streams to extract large volumes of significant information: this will help the understanding of ionospheric processes and can be used as input to automatic frequency management systems for communications networks.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1996
Accession Number
ADA311650

Entities

People

  • Nicholas Redding

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • C4I
  • Cyber
  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Communication Systems
  • Computers
  • Coordinate Systems
  • Curve Fitting
  • Detection
  • Electron Density
  • Electronics
  • Equations
  • Gray Scale
  • Identification
  • Image Processing
  • Information Retrieval
  • Information Science
  • Information Systems
  • Ionospheric Models
  • Ionospheric Propagation
  • Two Dimensional

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Neural Network Machine Learning.
  • Space/Atmospheric Physics.