Results 241 to 250 of about 2,606 (253)

Solar extreme ultraviolet emissions in the range 260?1300 � observed from OSO-III

Solar Physics, 1969
Solar electromagnetic radiation of wavelengths ranging from 260–1300 A was measured by a grazing-incidence grating spectrometer on OSO-III, which operated as a monochromator with a wavelength bandwidth of about 2 A and an acceptance angle covering the whole disk without any instrumental discrimination of source locations.
H. E. Hinteregger, L. A. Hall
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The extreme ultraviolet emissions of solar flares: A comparison between OSO-6 spectroheliograph observations and SFDs

Solar Physics, 1973
The time structure and intensity of OSO-6 observations of EUV bursts were studied in relation to the corresponding 10-1030 A enhancements deduced from SFD data. Impulsive EUV emissions from lines normally emitted from either the chromosphere or from the chromosphere-corona transition region rise simultaneously with the 10-1030 A flash, to within the ...
R. F. Donnelly, A. T. Wood, R. W. Noyes
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Extreme Ultraviolet Solar Emission Lines and the Transition Layer between the Chromosphere and the Corona

Publications of the Astronomical Society of Japan, 1963
Abstract Models of the solar transition layer between the chromosphere and the corona are constructed to give a reasonable explanation for the rocket- and eclipse observations and also for radio emission. Models for the undisturbed sun, both at the sunspot maximum and Jllinimum, and for the active region are proposed in the present ...
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Weakening of the solar extreme-ultraviolet line emission by lyman continuum absorption as derived from line ratios

Solar Physics, 1984
The intensity ratios of Niii, Oiii, Oiv, and Ov lines observed by the HCO experiment on Skylab are compared with the results of recent multilevel calculations. It is found that solar transition-region spectra require Lyman continuum absorption. The equivalent optical thickness of the absorbers causing the weakening is found to be 1.6–1.7 for a quiet ...
Mitsuo Kanno, Yoshinori Suematsu, Takara Nishikawa   +2 more
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A Discussion on solar studies with special reference to space observations - Extreme ultraviolet emission during flares

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1971
Abstract A number of time profiles are presented which show how the flux of radiation in the wavelength bands 0.1 to 0.3 nm, 0.3 to 0.9 nm, 0.8 to 1.6 nm and at 30.4 nm change during flares. The first sign of a flare is often a decrease of flux at 30.4 nm followed by an increase in the X-ray emission. In general, the higher the photon
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A Discussion on solar studies with special reference to space observations - Interpretation of extreme ultraviolet emissions from the Sun

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1971
Abstract The purpose of this review is to consider the analysis of extreme u.v. space observations for the interpretation of the Quiet Sun (Q.), active regions (a.r.) and flares (fl.). The three components must be segregated from one another using the observational data that exists.
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Solar Extreme and Far Ultraviolet Radiation Modeling for Aeronomic Calculations

Remote Sensing, 2021
Anatoliy Nusinov
exaly  

Solar Spectroscopy: Ultraviolet and Extreme Ultraviolet Emission

2004
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The Solar Extreme Ultraviolet Monitor for MAVEN

Space Science Reviews, 2015
Francis Eparvier, Thomas Woods, Edward Thiemann   +2 more
exaly  

Solar extreme ultraviolet irradiance: Present, past, and future

Journal of Geophysical Research, 2011
John Correira, Francis Eparvier, Judith Lean   +2 more
exaly