High Resolution Computerized Ionospheric Tomography Systems.

Abstract

Research during the period since 5/1/96 has focused on time frequency reconstruction and time varying imaging. The core of the space frequency algorithm, developed in year one, has been further refined. This algorithm has been tested on more robust sets of images and cases with simulated measurement noise. The results have been extremely positive. Future work will focus on making this core algorithm into a complete CIT algorithm. The other area of research has been in the development of the time varying algorithm. The goal was to develop an algorithm that combined model based imaging with smoothness constraints to enable imaging capable of detecting motion of the ionosphere during data acquisition. Work has focused on development of the Smoothness and Conjugate Gradient Method (SCG). This algorithm uses smoothness constraints for a relaxed fit to TEC data. Work is beginning on merging this algorithm with the Residual Correction Method, developed in year one. The result will be a three-dimensional (x,y,time) time varying algorithm.

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Document Details

Document Type
Technical Report
Publication Date
Jul 31, 1996
Accession Number
ADA311620

Entities

People

  • Helen Na

Organizations

  • University of Iowa

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Algorithms
  • Altitude
  • Data Acquisition
  • Databases
  • Electrical Engineering
  • Electron Density
  • Electrons
  • Frequency
  • Geometry
  • Grids
  • High Altitude
  • High Resolution
  • Ionosphere
  • Ionospheric Models
  • Measurement
  • Three Dimensional
  • Two Dimensional

Readers

  • Calculus or Mathematical Analysis
  • Computer Vision.
  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Space