SPECTROPHOTOMETRIC STUDIES OF AURORA.

Abstract

The spectrophotometric measurements which were made at Kiruna Geophysical Observatory are summarized. The investigation was devided into four main parts. The luminosity variations of a small area of the sky was studied and it was found that variations occur at frequencies above thousand cycles per second. A new technique was developed for the study of auroral motions up to several tens of kilometers per second. Auroral motions were also studied by means of asca films. Luminosity curves of several auroral features were made at a high sweeping speed. The connection between magnetic variations, cosmic noise absorption and the auroral luminosity was studied. It was found that absorption events during the break-up phase of the aurora are very closely related to the luminosity variations. The correlation with magnetic variations was not equally good. But in general the magnetic variations follow the luminosity variations better than the cosmic noise absorption when averaged over long time periods. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 05, 1964
Accession Number
AD0603094

Entities

People

  • Georg Gustafsson

Tags

DTIC Thesaurus Topics

  • Absorption
  • Buildings And Structures
  • Frequency
  • Luminosity
  • Measurement
  • Observatories
  • Optical Properties

Fields of Study

  • Physics

Readers

  • Astronomy/Astrophysics
  • Space Exploration and Orbital Mechanics.
  • Theoretical Analysis.