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    <Identification_Area>
        <logical_identifier>urn:esa:psa:context:instrument:gio.mag</logical_identifier>
        <version_id>1.0</version_id>
        <title>FLUXGATE MAGNETOMETER for GIO</title>
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        <product_class>Product_Context</product_class>
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            <Alias><alternate_title>urn:nasa:pds:context:instrument:mag.gio</alternate_title></Alias>  <!-- deprecated LID -->
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        <Modification_History>
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                <modification_date>2021-02-24</modification_date>
                <version_id>1.0</version_id>
                <description>
                    Changed inst LIDs from
                      u:n:p:c:i:instID.scID to
                      u:n:p:c:i:scID.instID
                    Changed LIDs from urn:nasa:pds: to urn:esa:psa:
                    And per "Guide toPDS4 Context Products" v1.7,
                    changed all lidvid_reference to lid_reference
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    <Reference_List>
        <Internal_Reference>
            <lid_reference>urn:esa:psa:context:instrument_host:spacecraft.gio</lid_reference>
            <reference_type>instrument_to_instrument_host</reference_type>
        </Internal_Reference>
        <External_Reference>
            <reference_text>
                   Acuna, M.H., 1974, &apos;FLUXGATE MAGNETOMETERS FOR OUTER PLANETS EXPLORATION&apos;, IEEE
                   Trans., MAG-10, 519.
            </reference_text>
            <description>reference.ACUNA1974</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Alfven, H., 1958, &apos;On the Theory of Comet Tails&apos;, Tellus, 9, 92-96
            </reference_text>
            <description>reference.ALFVEN1958</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Behannon, K.W., M.H. Acuna, L.F. Burlaga, R.P. Lepping, N.F. Ness, and F.M.
                   Neubauer, Magnetic Field Experiment for Voyagers 1 and 2, Space Sci. Rev., Vol.
                   21, p. 235, 1977.
            </reference_text>
            <description>reference.BEHANNONETAL1977</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Cloutier, P. A., Tascione, T. F., Daniel, R. E. Jr., Taylor, H. A., and Wolfe,
                   R. S., 1983, &apos;PHYSICS OF THE INTERACTION OF THE SOLAR WIND WITH THE IONOSPHERE
                   OF VENUS: FLOW/FIELD MODELS&apos;, In: &apos;Venus&apos; (Eds Hunten, D. M. et al), Univ. of
                   Arizona Press, 941-979.
            </reference_text>
            <description>reference.CLOUTIERETAL1983</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Hedgecock, P.C., A correlation technique for magnetometer zero level
                   determination, Space Sci. Instr., 1, 83, 1975.
            </reference_text>
            <description>reference.HEDGECOCK1975</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Ip, W. H., and Axford, W. I., 1982, &apos;Theories of Physical Processes in the
                   Cometary Comae and Ion Tails&apos;, In: Comets (Ed. Wilkering et. al), Univ. of
                   Arizona Press, 588-634.
            </reference_text>
            <description>reference.IP-AXFORD1982</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   &apos;Encounters with Comet Halley, The first results&apos;, Nature, Volume 321, No.
                   6067, 15 May 1986.
            </reference_text>
            <description>reference.NATURE321</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Ness, N.F., Acuna, M.H., Behannon, K.W., Burlaga, L.F., Connerney, J.E.P.,
                   Lepping, R.P., , The Induced Magnetosphere of Titan, J. Geophys. Res., 87,
                   13469-1381, 1982.
            </reference_text>
            <description>reference.NESSETAL1982</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Neubauer, F.M., The Giotto Magnetometer Experiment, ESA SP-169, 1981.
            </reference_text>
            <description>reference.NEUBAUER1981</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Neubauer, F.M., G. Musmann, M.H. Acuna, L.F. Burlaga, N.F. Ness, F. Mariani, M.
                   Wallis, E. Ungstrup, and H. Schmidt, The Giotto magnetic field investigation,
                   In: Cometary Exploration, Proc. Int. Conf. Cometary Exploration, 15-19,
                   Budapest (Ed. Gombosi T I), 401-410, November 1982.
            </reference_text>
            <description>reference.NEUBAUERETAL1983</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Neubauer, F.M., D.A. Gurnett, J.D. Scudder, and R.E. Hartle, Titan&apos;s
                   Magnetospheric Interaction, Saturn, ed. by T. Gehrels, Univ. of Arizona Press,
                   Tucson, 760-787, 1984.
            </reference_text>
            <description>reference.NEUBAUERETAL1984</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Russell, C.T. and R.C. Elphic, 1979, Observation of magnetic flux ropes in the
                   Venus ionosphere, Nature, 279, 616-618.
            </reference_text>
            <description>reference.RUSSELL-ELPHIC1979</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Russell C T &amp; O Vaisberg, The interaction of the solar wind with Venus, Venus
                   (Eds. Hunten et al.) University of Arizona Press, 873-940, 1983.
            </reference_text>
            <description>reference.RUSSELL-VAISBERG1983</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Schmidt, H.U., and R. Wegmann, Plasma flow and magnetic field in comets, In:
                   Comets (Ed. L.L.Wilkening), University of Arizona Press, 538-560, 1982.
            </reference_text>
            <description>reference.SCHMIDT-WEGMANN1982</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Wallis, M.K., Weakly shocked flows of the solar wind plasma through atmospheres
                   of comets and planets, Planet. Space Sci., 21, 1647-1660, 1973.
            </reference_text>
            <description>reference.WALLIS1973</description>
        </External_Reference>
        <External_Reference>
            <reference_text>
                   Winske D., C.S. Wu, Y.Y. Li, Z.Z. Mou, and S.Y. Guo, Coupling of newborn ions
                   to the solar wind by electromagnetic instabilities and their interaction with
                   the bow shock, J. Geophys. Res., 90, 2713-2726, 1985.
            </reference_text>
            <description>reference.WINSKEETAL1985</description>
        </External_Reference>
    </Reference_List>
    
    <Instrument>
        <name>FLUXGATE MAGNETOMETER</name>
        <type>Magnetometer</type>
        <naif_instrument_id>not applicable</naif_instrument_id>

        <serial_number>not applicable</serial_number>

        <description>
      Instrument Overview
      ===================
      The Giotto Magnetometer Experiment consisted of a triaxial and separate
      biaxial system of fluxgate sensors of the ring-core type, the
      associated analog electronics and a digital processor.  Because of the
      dust hazard near closest approach to comet 1P/Halley (the target of the
      original Giotto mission), a magnetometer boom could not be included in
      the spacecraft design.  The resulting magnetic contamination problem
      was addressed by the use of the two magnetometers and by a magnetic
      cleanliness program.
 
      For details on the instrument design and operation, see the article
      from ESA publication SP-1077 specifically concerning the magnetometer.
      This article is republished as part of the documentation included in
      the Giotto Extended Mission Archive.

        </description>
    </Instrument>
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