Instrumental Effects on a Proposed Mg 2 Index of Solar Activity

Abstract

The Mg II resonance lines near 2800 Angstroms have been proposed as a monitor for solar activity in the ultraviolet, particularly for the region around 2075A. Balloon measurements in 0.1 A resolution are used to investigate the dependence of the proposed index on the characteristics of the measuring instrument. It is shown that for measurements using instruments with low spectral resolution, the value of the index is very sensitive to individual instrument characteristics; and that therefore scale standardization is difficult to maintain. Keywords: Reprints, Magnesium II spectral lines, Solar ultraviolet irradiance, Solar activity.

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 1988
Accession Number
ADA201707

Entities

People

  • G. P. Anderson
  • L. A. Hall

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Data Sets
  • Diffraction
  • Diffractometers
  • Electromagnetic Spectra
  • Errors
  • Intensity
  • Low Resolution
  • Measurement
  • Measuring Instruments
  • Radiation
  • Solar Activity
  • Solar Radiation
  • Solar Spectrum
  • Spectra
  • Spectral Lines

Readers

  • Spectroscopy.
  • Systems Analysis and Design