File:Oso3 small.gif
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English: The Third Orbiting Solar Observatory, OSO-3, was launched on 8 March 1967, into a nearly circular orbit of mean altitude 550 km, inclined at 33 degrees with respect to the equatorial plane. The satellite had two principle components, a continuously spinning wheel in which the hard X-ray experiment is mounted with a radial view, and a sail component which was served to acquire the sun during the orbit day. The attitude control system maintained the scan plane orientation to within a few degrees of the sun. The spin-period of the satellite of roughly 1.7 s allowed about 1 cm2/s exposure per revolution to sources on the scan plane. Celestial sources near the ecliptic plane such as Sco X-1 transited the instrument scan plane twice a year. Only real-time data were received from the satellite after the last tape recorder failure on 27 June 1968. The last data transmission occurred 10 November 1969. OSO-3 descended into the atmosphere on 4 April 1982. |
| Date | |
| Source | NASA's HEASARC: Observatories, Goddard Spaceflight Center |
| Author | HEASARC Director: Dr. Alan P. Smale HEASARC Associate Director: Dr. Roger Brissenden Responsible NASA Official: Phil Newman Web Curator: Meredith Gibb |
| Permission (Reusing this file) |
Images produced by NASA are usually free of copyright [...] |
The instrument flown on OSO-3 obtained extensive observations of solar flares, the diffuse component of cosmic X-rays, and the observation of a single flare episode from Sco X-1.
The gamma-ray instrument registered 621 events attributed to cosmic gamma- rays above 50 MeV. A complete sky survey showed that the celestial distribution of gamma-rays is highly anisotropic, being concentrated along the galactic equator. In addition, an extended region around the galactic center showed a higher measured intensity.
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) |  |
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| current | 22:54, 12 September 2009 | | 299 × 283 (90 KB) | Marshallsumter (talk | contribs) | {{Information |Description={{en|1=The Third Orbiting Solar Observatory, OSO-3, was launched on 8 March 1967, into a nearly circular orbit of mean altitude 550 km, inclined at 33 degrees with respect to the equatorial plane. The satellite had two principle |
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