File:Smithsonian Institution Archives - 96-960.jpg
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DescriptionSmithsonian Institution Archives - 96-960.jpg |
Volunteer satellite trackers in Pretoria, South Africa, for Smithsonian Astrophysical Observatory's Moonwatch Network, one of more than 100 teams worldwide. Volunteers used the "fence method" of observing the sky. Each observer covered a small, overlapping portion of a specific sky quadrant, and watches for the passage of the satellite in his telescope. The instrument used was the Moonwatch Apogee Scope, a 20 power telescope with a 5-inch objective lens. The Moonwatch teams backed up an optical network of 12 Baker-Nunn tracking cameras Full description |
Date | |
Source | Smithsonian Institution Archives |
Author | Smithsonian Institution Archives |
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Public domainPublic domainfalsefalse |
This image is from the Smithsonian Institution Archives (SIA). SIA has determined that there are no known copyright restrictions because the SIA believes, to the best of its ability based on available information, that the content is unlikely to be protected by copyright interests and, in all likelihood, is in the public domain. This may mean:
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current | 14:28, 8 October 2012 | 981 × 768 (246 KB) | M.casanova (talk | contribs) |
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