Some First Results with the New Digital Ionosonde in San Diego

Abstract

The new digital ionosonde (Dynasonde) became operational in early March 1992. The system takes ionograms in five minute intervals and the data are processed, extracting F-region profile and propagation parameters on a routine basis. The data verify earlier findings that a minimum sampling rate of twelve ionograms per hour is necessary to avoid aliasing. The most surprising result to date is the observation of large variations of the height of the F-region maximum (of the order of 100 km) during the nighttime hours of otherwise undisturbed days in late March and early April. The observed height variations are quasi-periodic, with periods of two to three hours and appear to have little effect on the F-region maximum electron density.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1993
Accession Number
ADA265178

Entities

People

  • A K Paul
  • R. A. Sprague

Organizations

  • Naval Command, Control and Ocean Surveillance Center

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Atmospheric Sciences
  • Classification
  • Electro-Optics
  • Electron Density
  • Electrons
  • Intervals
  • Ionograms
  • Ionosondes
  • Observation
  • Ocean Surveillance
  • Sampling
  • Security
  • Surveillance
  • Test And Evaluation

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Space/Atmospheric Physics.

Technology Areas

  • Microelectronics