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A newly observed solar feature: macrospicules in He II 304 Å.
He II 304 A spectroheliograms, obtained with the NRL extreme-ultraviolet slitless spectrograph during the Skylab mission, show spikelike structures at the sun's polar limb which resemble the familiar
Extreme ultraviolet spectroheliograph ATM experiment S082A.
The XUV spectroheliograph, Apollo Telescope Mount experiment S082A, is described, a slitless Wadsworth grating spectrograph that employed photographic recording that had aberrations and the provisions necessary to maintain optimum imagery and reliability in a space environment are discussed.
Forbidden lines of highly ionized iron in solar flare spectra.
Forbidden lines of Fe xvm, Fe xix, and Fe xxi are identified at 974, 1118, and 1354 Ä, respectively, in NRL ATM solar flare spectra. These lines are due to magnetic dipole transitions between levels
A Study of Night Myopia
It was concluded that accommodation was not a significant cause of night myopia in the observers examined, and its dependence upon the brightness level was primarily a result of undercorrected spherical aberration of the eye.
Forbidden lines of the solar corona and transition zone: 975--3000 A
New forbidden lines characteristic of 5 x 10/sup 4/--3 x 10/sup 6/ K plasmas are observed in ATM UV spectra. New identifications, accurate wavelengths, ionization classes, intensities, and
Extreme ultraviolet spectrograph ATM experiment S082B.
The extreme ultraviolet, double-dispersion, photographic spectrograph, Apollo Telescope Mount (ATM) Experiment S082B on Skylab is described. Novel features were the use of a predisperser grating with
A preliminary study of the Extreme Ultraviolet spectroheliograms from Skylab
Some of the first observations obtained with the Naval Research Laboratory's Extreme Ultraviolet Spectrograph (S082A) during the first Skylab mission are presented and compared with magnetograms and