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        <title>Pre-Magellan Radar and Gravity Observations</title>
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                <alternate_title>urn:nasa:pds:context:investigation:mission.pre-magellan</alternate_title>  <!-- deprecated LID -->
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                <modification_date>2024-10-08</modification_date>
                <version_id>1.0</version_id>
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                    Initial version produced from PDS Editorial Working Group efforts. Replaces deprecated version (mission.pre-magellan_1.1_deprecated).
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            <reference_type>investigation_to_target</reference_type>
        </Internal_Reference>
        <Internal_Reference>
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            <reference_type>investigation_to_target</reference_type>
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        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context_support:description:pre-magellan_description</lid_reference>
            <reference_type>investigation_to_document</reference_type>
            <comment>Detailed documentation about this context product.</comment>
        </Internal_Reference>
        <External_Reference> 
            <doi>10.1007/BF00054324</doi>
            <reference_text>
                Thompson, T. W., High-resolution Lunar radar map at 70-cm wavelength, The Earth, Moon, and Planets, 37, 59-70, 1987.
            </reference_text>
            <description>Journal article presenting lunar radar data.</description>
        </External_Reference>
        <External_Reference> 
            <doi>10.1126/science.246.4928.373</doi>
            <reference_text>
                Campbell, D.B., J.W. Head, A.A. Hine, J.K. Harmon, D.A. Senske, and P.C. Fisher, 1989, Styles of volcanism on Venus: New Arecibo high resolution radar data, Science, 246, 373-377.
            </reference_text>
            <description>Journal article discussing radar data and volcanism on Venus.</description>
        </External_Reference>
        <External_Reference> 
            <reference_text>
                Clark, P.E., M.A. Leake, and R.F. 
                Jurgens, 1988, Goldstone radar observations of Mercury, 77-100,
                in Mercury, The University of Arizona Press, Tucson.
            </reference_text>
            <description>Book presenting Mercury radar data.</description>
        </External_Reference>
        <External_Reference> 
            <doi>10.1016/0019-1035(75)90173-6</doi>
            <reference_text>
                Downs, G.S., P.E. Reichley, and R.R.
                Green, 1975, Radar measurements of martian topography and 
                surface properties:  The 1971 and 1973 oppositions, Icarus, 26,
                273-312.
            </reference_text>
            <description>Journal article presenting Mars radar data.</description>
        </External_Reference>
        <External_Reference> 
            <reference_text>
                Arvidson, R.E., J.J. Plaut, R.F. 
                Jurgens, R.S. Saunders, M.A. Slade, 1990, Geology of Southern 
                Guinevere Planitia, Venus, based on analyses of Goldstone radar
                data, Proc. 20th Lunar and Planet. Sci. Conf., 557-572.
            </reference_text>
            <description>Conference abstract discussing radar data and the geology of Venus.</description>
        </External_Reference>
        <External_Reference> 
            <doi>10.1007/BF00562017</doi>
            <reference_text>
                Zisk, S.H., G.H. Pettengill, G.W. 
                Catuna, 1974, High-resolution radar maps of the lunar surface 
                at 3.8-cm wavelength, The Moon, 10, 17-50.
            </reference_text>
            <description>Journal article presenting lunar radar data.</description>
        </External_Reference>
        <External_Reference> 
            <doi>10.1029/JA085iA13p08282</doi>
            <reference_text>
                Jurgens, R.F., R.M. Goldstein, H.C. 
                Rumsey, R.R. Green, 1980, Images of Venus by three-station 
                radar interferometry--1977 results, J. Geophys. Res., 85, 
                8282-8294.
            </reference_text>
            <description>Journal article presenting Venus radar data.</description>
        </External_Reference>
        <External_Reference> 
            <doi>10.1029/JA085iA13p08232</doi>
            <reference_text>
                Masursky, H., E. Eliason, P. G. 
                Ford, G. E. McGill, G. H. Pettengill, G. G. Schaber, and G. 
                Schubert, Pioneer Venus radar results: geology from images and 
                altimetry, J. Geophys. Res., 85, 8232-8260, 1980.
            </reference_text>
            <description>Journal article presenting Venus radar data.</description>
        </External_Reference>
    </Reference_List>

    <Investigation>
        <name>Pre-Magellan Radar and Gravity Observations</name>
        <type>Observing Campaign</type>
        <start_date>1968-11-09</start_date>
        <stop_date>1988-07-27</stop_date>

        <description>This dataset contains 15 radar, altimetry, and gravity data sets, including extensive Earth-based radar observations of the Earth's 
            Moon and the inner planets, spanning the years 1968-1990. These datasets were prepared in advance of the Magellan Mission to Venus (1990-1994) 
            in order to provide a set of relevant radar and gravity data for comparison to Magellan data.           
        </description>
    </Investigation>
</Product_Context>
