The density and vibrational distribution of molecular oxygen in the lower thermosphere
Molecular oxygen density and vibrational distribution in lower atmosphere, observing solar UV radiation absorption by satellite OSO-4
Reid, R. H. G.↗
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Solar XUV limb brightening observations. I - The lithium-like ions
Solar equatorial limb brightening of far UV resonance lines of lithium-like N V, O VI, Ne VIII, Mg X and Si XIII ions, interpreting oso-4 data with coronal model
Withbroe, G. L.↗
Extreme ultraviolet observations of active regions in the chromosphere and the corona
Oso-4 far UV observations of solar chromosphere and corona active regions
Kirshner, R. P.↗
Experiment to measure hard solar and celestial X-rays from the fifth Orbiting Solar Observatory
Experiment to measure hard solar and celestial X rays from OSO-5 in energy range of 15 to 250 keV
Dennis, B. R.↗
Experimental results of gamma-ray astronomy from balloon and satellite experiments
OSO-3 gamma ray astronomic data
Kraushaar, W. L.↗
The spectrum of diffuse cosmic X rays - 7.7-113 keV
Diffuse cosmic X ray spectrum obtained from telescope aboard OSO 3 satellite
Hudson, H. S.↗
Solar radiation in the extreme ultraviolet and its variation with solar rotation
Solar UV radiation measurements by OSO-3, obtaining flux variation over solar rotation period
Hall, L. A.↗
Observations of unresolved galactic X-ray sources
OSO 3 satellite observations of diffuse X ray emission from galactic plane, eliminating straight line interpolation of spectrum between 3-10 keV X ray range and 100 MeV energy range
Hudson, H. S.↗
The extreme-ultraviolet spectrum of the quiet sun
Quiet sun extreme UV spectrum measurements by OSO-4 Harvard scanning spectrometer, discussing instrument design and experimental results
Dupree, A. K.↗
Workshop on orbiting solar observatories
OSO satellites observations, studying X ray flare phases, temperatures and spectra
Brandt, J. C.↗
Measurements of the gegenschein from space
OSO-6 measurements of gegenschein, comparing relative sky brightness data with ground based observations
Aller, L. H.↗
Lightning observations by satellite
Lightning observation by OSO-E satellite, suggesting maximum thunderstorm incidence over North Atlantic Ocean
Ney, E. P.↗
Long term temporal variations of the hard X-ray flux from the Centaurus region
The X-ray telescope aboard the third Orbiting Solar Observatory (OSO-3) observed the Centaurus region daily from 1967 October to 1968 February, and also for five days in 1968 June. A stable minimum flux of 0.33 + or - 0.03 photons (sq cm sec)/1 between 7.7 and 38 keV from a source around l = 305 deg is derived. Several single days show enhanced fluxes, and two extensive flaring episodes, one with a soft and the other a very hard spectrum, lasting at least ten days.
Schwartz, D. A.↗
High energy astronomy or astrophysics and properties of the interplanetary plasma
The research activities related to high energy astrophysics and interplanetary plasma are reported. The experimental work in the following areas are described: (1) balloon-and rocket-borne cosmic X-ray, (2) X-ray spectroscopy, and (3) OSO-3 gamma ray experiment. Plasma studies in the interplanetary region, magnetosphere, and geomagnetic tail are included.
Source record↗
Analysis of solar X-ray data
Type III solar bursts occurring in the absence of solar flares were observed to be accompanied by weak X-radiation. The energy scale of an OSO-3 soft X-ray ion chamber was assessed using realistic theoretical X-ray spectra. Relationships between soft solar X-rays and solar activity were investigated. These included optical studies, the role of the Type III acceleration mechanism in establishing the soft X-ray source volume, H alpha flare intensity variations, and gross magnetic field structure.
Teske, R. G.↗
Theoretical implications of gamma-ray astronomy
The measurement of cosmic gamma rays above 100 MeV by OSO-3 satellite and those from 1 to 6 MeV measured by the ERS-18 satellite are summarized.
Stecker, F. W.↗
Glancing incidence optics for X-ray and ultraviolet astronomy.
Glancing incidence telescopes of the kind first described by Wolter have now been physically realized, so that it is possible to obtain high-resolution images of celestial objects at all wavelengths greater than about 3 A. The GSFC-MSFC X-ray telescope for the Apollo telescope mount uses Wolter type 1 optics and is capable of forming images of the sun in the 8-70 A region with spatial resolution of the order of one arc second. The GSFC extreme ultraviolet spectroheliometer for OSO H uses type 2 optics and can obtain images of the sun in spectral lines in the 170-400 A region with a spatial resolution of about ten arc seconds. Theoretical (ray trace) and laboratory data on these systems are presented.
Underwood, J. H.↗
Bidirectional reflectance of the moonlit earth.
Use of OGO-4 airglow photometer data and computed lunar spectral irradiances at the subsatellite point to examine the highest radiance over clouds and lowest radiance over open ocean near 3914, 5577, 5893, 6225, and 6300 A in terms of bidirectional reflectance. The results are compared to and are consistent with mathematical models of the atmosphere developed by Plass and Kattawar (1968, 1970) and with daytime measurements from OSO-3 by Neel et al. (1969).
Fowler, W. B.↗