Thule Riometer Observations of Polar Cap Absorption Events (1962-1972)

Abstract

Polar Cap Absorption (PCA) events have been observed at Thule, Greenland, using a ground-based riometer for the past decade. The riometer was operated at a fixed frequency of 30 MHz, and used a two-element Yagi antenna directed toward the zenith. This report provides information for operational systems personnel and systems designers concerning the mean behavior of PCAs and other aspects of the phenomenon; for example, the extreme cases in duration and magnitude. In addition, included as an appendix are plots of dB absorption and proton flux (obtained from satellites) versus time for each event. The total number of events is 29.

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Document Details

Document Type
Technical Report
Publication Date
Jan 30, 1973
Accession Number
AD0762279

Entities

People

  • Raymond J. Cormier

Organizations

  • Air Force Cambridge Research Laboratories

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Absorption
  • Abstracts
  • Air Force
  • Artificial Satellites
  • Dose Rate
  • Ecology
  • Geographic Regions
  • Greenland
  • Ground Based
  • Massachusetts
  • Observation
  • Physics Laboratories
  • Polar Cap
  • Polar Cap Absorption
  • Riometers
  • Security
  • United States

Readers

  • Astronomy and Astrophysics.
  • Phased Array Antenna Design.
  • Polar and Arctic Studies

Technology Areas

  • Space