| Автор | Masursky, Harold |
| Автор | Batson, R. M. |
| Автор | McCauley, J. F. |
| Автор | Soderblom, L. A. |
| Автор | Wildey, R. L. |
| Автор | Carr, M. H. |
| Автор | Milton, D. J. |
| Автор | Wilhelms, D. E. |
| Автор | Smith, B. A. |
| Автор | Kirby, T. B. |
| Автор | Robinson, J. C. |
| Автор | Leovy, C. B. |
| Автор | Briggs, G. A. |
| Автор | Duxbury, T. C. |
| Автор | Acton, C. H. |
| Автор | Murray, B. C. |
| Автор | Cutts, J. A. |
| Автор | Sharp, R. P. |
| Автор | Smith, Susan |
| Автор | Leighton, R. B. |
| Автор | Sagan, C. |
| Автор | Veverka, J. |
| Автор | Noland, M. |
| Автор | Lederberg, J. |
| Автор | Levinthal, E. |
| Автор | Pollack, J. B. |
| Автор | Moore, J. T. |
| Автор | Hartmann, W. K. |
| Автор | Shipley, E. N. |
| Автор | De Vaucouleurs, G. |
| Автор | Davies, M. E. |
| Дата выпуска | 1972 |
| dc.description | At orbit insertion on 14 November 1971 the Martian surface was largely obscured by a dust haze with an extinction optical depth that ranged from near unity in the south polar region to probably greater than 2 over most of the planet. The only features clearly visible were the south polar cap, one dark, spot in Nix Olympica, and three dark spots in the Tharsis region. During the third week the atmosphere began to clear and surface visibility improved, but contrasts remained a fraction of their normal value. Each of the dark spots that apparently protrude through most of the dust-filled atmosphere has a crater or crater complex in its center. The craters are rimless and have featureless floors that, in the crater complexes, are at different levels. The largest crater within the southernmost spot is approximately 100 kilometers wide. The craters apparently were formed by subsidence and resemble terrestrial calderas. The south polar cap has a regular margin, suggsting very flat topography. Two craters outside the cap have frost on their floors; an apparent crater rim within the cap is frost free, indicating preferentia loss of frost from elevated ground. If this is so then the curvilinear streaks, which were frost covered in 1969 and are now clear of frost, may be low-relief ridges. Closeup pictures of Phobos and Deimos show that Phobos is about 25 ±5 by 21 ±1 kilometers and Deimos is about 13.5 ± 2 by 12.0 ±0.5 kilometers. Both have irregular shapes and are highly cratered, with some craters showing raised rims. The satellites are dark objects with geometric albedos of 0.05. |
| Формат | application.pdf |
| Издатель | American Association for the Advancement of Science |
| Копирайт | © 1972 by the American Association for the Advancement of Science |
| Тема | Reports |
| Название | Mariner 9 Television Reconnaissance of Mars and Its Satellites: Preliminary Results |
| Тип | research-article |
| Electronic ISSN | 1095-9203 |
| Print ISSN | 0036-8075 |
| Журнал | Science |
| Том | 175 |
| Первая страница | 294 |
| Последняя страница | 305 |
| Аффилиация | U.S. Geological Survey, 601 East Cedar Avenue, Flagstaff, Arizona 86001 |
| Аффилиация | U.S. Geological Survey, 354 Middlefield Road, Menlo Park, California 94025 |
| Аффилиация | Department of Astronomy, New Mexico State University, Las Cruces 88001 |
| Аффилиация | Department of Atmospheric Sciences, University of Washington, Seattle 98105 |
| Аффилиация | Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91103 |
| Аффилиация | Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena 91109 |
| Аффилиация | Division of Physics, Mathematics, and Astronomy, California Institute of Technology |
| Аффилиация | Laboratory for Planetary Studies, Cornell University, Ithaca, New York 14850 |
| Аффилиация | Department of Genetics, Stanford University School of Medicine, Stanford, California 94305 |
| Аффилиация | Space Sciences Division, Ames Research Center, Moffett Field, California 94305 |
| Аффилиация | IIT Research Institute, 60 West Giaconda Way, Tucson, Arizona 85704 |
| Аффилиация | Bellcomm, Inc., 955 L'Enfant Plaza North, SW Washington, D.C. 20024 |
| Аффилиация | Department of Astronomy, University of Texas, Austin 78712 |
| Аффилиация | Rand Corporation, 1700 Main Street, Santa Monica, California 90401 |
| Выпуск | 4019 |
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