Significant Achievements in Solar Physics. 1958-64, Issue 100
United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
U.S. Government Printing Office, 1966 - Sun - 104 pages
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active centers active regions angular resolution arc-minute arc-seconds atmosphere Beryllium Boron Beryllium calcium K-line chromosphere continuum corona coronagraph correlation detectors E-layer echelle electron density emission lines emitted energy erg/cm2/sec Fe XV flare X-rays flown Fraunhofer lines Friedman grazing incidence grazing-incidence H-alpha increase instrument intensity ionization ionospheric Lyman series Lyman-alpha line magnetic fields Mc/sec measurements ments monitoring monochromators NASA nonthermal North-Holland Pub NRL group observations obtained optical orbit percent phenomena photocathode photoelectric photographic photon photospheric plages plasma produced proportional counters quiet Sun range resonance line satellite scan short wavelength soft X-ray region solar activity solar astronomy solar flares solar physics Solar Radiation solar soft X-ray solar X-rays Space Research Space Sci spacecraft spectral lines spectrograph spectroheliograph spicules stray light Sun's sunspot techniques telescope temperature thermal tion Tousey ref variations visible wavelength X-ray emission X-ray flux X-ray spectrum zone plate