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    "description": "This data set has 3-min resolution solar wind plasma parameters (flow speed and direction angles, ion thermal speed and density) from the MIT Faraday Cup on Explorer 33 (AIMP 1, IMP D). There are no spacecraft position data in the records. The data are in annual ASCII files.",
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        <xhtml:div class="header">
            <xhtml:div class="middle">HDPWS</xhtml:div>
        </xhtml:div>
        <xhtml:div class="page">
            <xhtml:div class="spase">
                <xhtml:div class="abstract">
                    <xhtml:div class="access">
                        <xhtml:p class="box-title">
                    Data Access
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                        <xhtml:ul class="list">
                            <xhtml:li class="list">
                                <xhtml:a target="_blank" href="ftps://spdf.gsfc.nasa.gov/pub/data/explorer/explorer33/plasma_probe/3-min_interplanetary_plasma_param/">FTPS from SPDF (not with most browsers)</xhtml:a>
                            </xhtml:li>
                            <xhtml:li class="list">
                                <xhtml:a target="_blank" href="https://spdf.gsfc.nasa.gov/pub/data/explorer/explorer33/plasma_probe/3-min_interplanetary_plasma_param/">HTTPS from SPDF</xhtml:a>
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                        </xhtml:ul>
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                    <xhtml:div class="citation inset">
                        <xhtml:h1>
                            <xhtml:a name="spase://NASA/NumericalData/Explorer33/FaradayCup/PT3M">Explorer 33 3-min solar wind plasma data</xhtml:a>
                        </xhtml:h1>
                        <xhtml:p>
                            <xhtml:div class="term">ResourceID</xhtml:div>
                            <xhtml:div class="definition">spase://NASA/NumericalData/Explorer33/FaradayCup/PT3M</xhtml:div>
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                        <xhtml:p>
                            <xhtml:div class="term">Description</xhtml:div>
                            <xhtml:div class="definition">This data set has 3-min resolution solar wind plasma parameters (flow speed and direction angles, ion thermal speed and density) from the MIT Faraday Cup on Explorer 33 (AIMP 1, IMP D). There are no spacecraft position data in the records. The data are in annual ASCII files.</xhtml:div>
                        </xhtml:p>
                        <xhtml:p>
                            <xhtml:div class="term">Metadata Rights</xhtml:div>
                            <xhtml:div class="definition">CC0-1.0: 
              <xhtml:a href="https://spdx.org/licenses/CC0-1.0.html" target="_blank">Creative Commons Zero v1.0 Universal</xhtml:a>
                                <xhtml:div class="term">Note</xhtml:div>
                                <xhtml:div class="definition">CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.
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                        <xhtml:a target="_blank" href="/WS/hdp/1/Spase?ResourceID=spase://NASA/NumericalData/Explorer33/FaradayCup/PT3M&amp;Format=spase_xml" download="PT3M.xml">View XML</xhtml:a> |
              <xhtml:a target="_blank" href="https://spase-editor.heliocloud.org/?edit=https://heliophysicsdata.gsfc.nasa.gov/WS/hdp/1/Spase?ResourceID=spase://NASA/NumericalData/Explorer33/FaradayCup/PT3M&amp;Format=spase_xml">Edit</xhtml:a>
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                    <xhtml:h1 class="detail">Details</xhtml:h1>
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                        <xhtml:p class="version">Version:2.7.1</xhtml:p>
                        <xhtml:h1>NumericalData</xhtml:h1>
                        <xhtml:div class="term">ResourceID</xhtml:div>
                        <xhtml:div class="definition">spase://NASA/NumericalData/Explorer33/FaradayCup/PT3M</xhtml:div>
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                        <xhtml:div class="definition">NASA</xhtml:div>
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                            <xhtml:div class="term">ResourceName</xhtml:div>
                            <xhtml:div class="definition">Explorer 33 3-min solar wind plasma data</xhtml:div>
                            <xhtml:div class="term">ReleaseDate</xhtml:div>
                            <xhtml:div class="definition">2025-12-04 13:29:11Z</xhtml:div>
                            <xhtml:div class="term">RevisionHistory</xhtml:div>
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                                    <xhtml:div class="term">ReleaseDate</xhtml:div>
                                    <xhtml:div class="definition">2021-03-11 18:39:11Z</xhtml:div>
                                    <xhtml:div class="term">Note</xhtml:div>
                                    <xhtml:div class="definition">Only known prior ReleaseDate of the metadata</xhtml:div>
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                                <xhtml:div class="term">RevisionEvent</xhtml:div>
                                <xhtml:div class="definition">
                                    <xhtml:div class="term">ReleaseDate</xhtml:div>
                                    <xhtml:div class="definition">2025-12-04 13:29:11Z</xhtml:div>
                                    <xhtml:div class="term">Note</xhtml:div>
                                    <xhtml:div class="definition">Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB</xhtml:div>
                                </xhtml:div>
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                            <xhtml:div class="term">Description</xhtml:div>
                            <xhtml:div class="definition">This data set has 3-min resolution solar wind plasma parameters (flow speed and direction angles, ion thermal speed and density) from the MIT Faraday Cup on Explorer 33 (AIMP 1, IMP D). There are no spacecraft position data in the records. The data are in annual ASCII files.</xhtml:div>
                            <xhtml:div class="term">Acknowledgement</xhtml:div>
                            <xhtml:div class="definition">To the MIT plasma team and to the Space Physics Data Facility at Goddard</xhtml:div>
                            <xhtml:div class="term">Contacts</xhtml:div>
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                                        <xhtml:th class="center">Role</xhtml:th>
                                        <xhtml:th class="center">Person</xhtml:th>
                                        <xhtml:th class="center">StartDate</xhtml:th>
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                                        <xhtml:th class="center">Note</xhtml:th>
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                                        <xhtml:tr>
                                            <xhtml:td>1.</xhtml:td>
                                            <xhtml:td>GeneralContact</xhtml:td>
                                            <xhtml:td>
                                                <xhtml:a target="_blank" href="https://spase-metadata.org/SMWG/Person/Alan.J.Lazarus.html">spase://SMWG/Person/Alan.J.Lazarus</xhtml:a>
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                            <xhtml:div class="term">InformationURL</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">Name</xhtml:div>
                                <xhtml:div class="definition">NSSDC Master Catalog</xhtml:div>
                                <xhtml:div class="term">URL</xhtml:div>
                                <xhtml:div class="definition">
                                    <xhtml:a target="_blank" href="https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1966-058A-06">https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1966-058A-06</xhtml:a>
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                                <xhtml:div class="term">Description</xhtml:div>
                                <xhtml:div class="definition">This reference contains a citation to a descriptive 1967 J.Geophys.Res. paper by the MIT team.</xhtml:div>
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                            <xhtml:div class="term">InformationURL</xhtml:div>
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                                <xhtml:div class="term">Name</xhtml:div>
                                <xhtml:div class="definition">NSSDC Data Set Catalog</xhtml:div>
                                <xhtml:div class="term">URL</xhtml:div>
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                                    <xhtml:a target="_blank" href="https://spdf.gsfc.nasa.gov/pub/documents/old/documentation_from_nssdc/dataset_catalogs/DSC_0168.pdf">https://spdf.gsfc.nasa.gov/pub/documents/old/documentation_from_nssdc/dataset_catalogs/DSC_0168.pdf</xhtml:a>
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                            <xhtml:div class="definition">spase://VHO/NumericalData/Explorer33/FaradayCup/PT3M</xhtml:div>
                            <xhtml:div class="definition">spase://VSPO/NumericalData/Explorer33/FaradayCup/PT3M</xhtml:div>
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                                <xhtml:a href="https://spase-metadata.org/SMWG/Repository/NASA/GSFC/SPDF.html">spase://SMWG/Repository/NASA/GSFC/SPDF</xhtml:a>
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                            <xhtml:div class="definition">Online</xhtml:div>
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                            <xhtml:div class="definition">Open</xhtml:div>
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                                    <xhtml:div class="definition">https://spdx.org/licenses/</xhtml:div>
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                                    <xhtml:div class="definition">CC0-1.0</xhtml:div>
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                                    <xhtml:div class="definition">https://spdx.org/licenses/CC0-1.0.html</xhtml:div>
                                    <xhtml:div class="term">RightsName</xhtml:div>
                                    <xhtml:div class="definition">Creative Commons Zero v1.0 Universal</xhtml:div>
                                    <xhtml:div class="term">Note</xhtml:div>
                                    <xhtml:div class="definition">CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products</xhtml:div>
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                            <xhtml:div class="term">AccessURL</xhtml:div>
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                                <xhtml:div class="definition">FTPS from SPDF (not with most browsers)</xhtml:div>
                                <xhtml:div class="term">URL</xhtml:div>
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                                    <xhtml:a target="_blank" href="ftps://spdf.gsfc.nasa.gov/pub/data/explorer/explorer33/plasma_probe/3-min_interplanetary_plasma_param/">ftps://spdf.gsfc.nasa.gov/pub/data/explorer/explorer33/plasma_probe/3-min_interplanetary_plasma_param/</xhtml:a>
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                            <xhtml:div class="term">AccessURL</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">Name</xhtml:div>
                                <xhtml:div class="definition">HTTPS from SPDF</xhtml:div>
                                <xhtml:div class="term">URL</xhtml:div>
                                <xhtml:div class="definition">
                                    <xhtml:a target="_blank" href="https://spdf.gsfc.nasa.gov/pub/data/explorer/explorer33/plasma_probe/3-min_interplanetary_plasma_param/">https://spdf.gsfc.nasa.gov/pub/data/explorer/explorer33/plasma_probe/3-min_interplanetary_plasma_param/</xhtml:a>
                                </xhtml:div>
                                <xhtml:div class="term">Description</xhtml:div>
                                <xhtml:div class="definition">In CDF via HTTP from SPDF</xhtml:div>
                            </xhtml:div>
                            <xhtml:div class="term">Format</xhtml:div>
                            <xhtml:div class="definition">Text</xhtml:div>
                            <xhtml:div class="term">DataExtent</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">Quantity</xhtml:div>
                                <xhtml:div class="definition">11</xhtml:div>
                                <xhtml:div class="term">Units</xhtml:div>
                                <xhtml:div class="definition">MB</xhtml:div>
                            </xhtml:div>
                            <xhtml:div class="term">Acknowledgement</xhtml:div>
                            <xhtml:div class="definition">The MIT Plasma Team and NSSDC</xhtml:div>
                        </xhtml:div>
                        <xhtml:div class="term">ProcessingLevel</xhtml:div>
                        <xhtml:div class="definition">Calibrated</xhtml:div>
                        <xhtml:div class="term">InstrumentIDs</xhtml:div>
                        <xhtml:div class="definition">
                            <xhtml:a target="_blank" href="https://spase-metadata.org/SMWG/Instrument/Explorer33/FaradayCup.html">spase://SMWG/Instrument/Explorer33/FaradayCup</xhtml:a>
                        </xhtml:div>
                        <xhtml:div class="term">MeasurementType</xhtml:div>
                        <xhtml:div class="definition">ThermalPlasma</xhtml:div>
                        <xhtml:div class="term">TemporalDescription</xhtml:div>
                        <xhtml:div class="definition">
                            <xhtml:div class="term">TimeSpan</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">StartDate</xhtml:div>
                                <xhtml:div class="definition">1966-07-06 00:00:00</xhtml:div>
                                <xhtml:div class="term">StopDate</xhtml:div>
                                <xhtml:div class="definition">1971-10-14 00:00:00</xhtml:div>
                            </xhtml:div>
                            <xhtml:div class="term">Cadence</xhtml:div>
                            <xhtml:div class="definition">PT3M</xhtml:div>
                        </xhtml:div>
                        <xhtml:div class="term">ObservedRegion</xhtml:div>
                        <xhtml:div class="definition">Heliosphere.NearEarth</xhtml:div>
                        <xhtml:div class="term">Caveats</xhtml:div>
                        <xhtml:div class="definition">There are no spacecraft ephemeris data in this data set, as of September, 2010.</xhtml:div>
                        <xhtml:div class="parameter">Parameter #1</xhtml:div>
                        <xhtml:div class="definition">
                            <xhtml:div class="term">Name</xhtml:div>
                            <xhtml:div class="definition">Ion density</xhtml:div>
                            <xhtml:div class="term">ParameterKey</xhtml:div>
                            <xhtml:div class="definition">Column_8</xhtml:div>
                            <xhtml:div class="term">Cadence</xhtml:div>
                            <xhtml:div class="definition">PT3M</xhtml:div>
                            <xhtml:div class="term">Units</xhtml:div>
                            <xhtml:div class="definition">1/cm**3</xhtml:div>
                            <xhtml:div class="term">Particle</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">ParticleType</xhtml:div>
                                <xhtml:div class="definition">Ion</xhtml:div>
                                <xhtml:div class="term">ParticleQuantity</xhtml:div>
                                <xhtml:div class="definition">NumberDensity</xhtml:div>
                            </xhtml:div>
                        </xhtml:div>
                        <xhtml:div class="parameter">Parameter #2</xhtml:div>
                        <xhtml:div class="definition">
                            <xhtml:div class="term">Name</xhtml:div>
                            <xhtml:div class="definition">Thermal speed</xhtml:div>
                            <xhtml:div class="term">ParameterKey</xhtml:div>
                            <xhtml:div class="definition">Column_12</xhtml:div>
                            <xhtml:div class="term">Cadence</xhtml:div>
                            <xhtml:div class="definition">PT3M</xhtml:div>
                            <xhtml:div class="term">Units</xhtml:div>
                            <xhtml:div class="definition">km/s</xhtml:div>
                            <xhtml:div class="term">Particle</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">ParticleType</xhtml:div>
                                <xhtml:div class="definition">Ion</xhtml:div>
                                <xhtml:div class="term">ParticleQuantity</xhtml:div>
                                <xhtml:div class="definition">ThermalSpeed</xhtml:div>
                            </xhtml:div>
                        </xhtml:div>
                        <xhtml:div class="parameter">Parameter #3</xhtml:div>
                        <xhtml:div class="definition">
                            <xhtml:div class="term">Name</xhtml:div>
                            <xhtml:div class="definition">Flow speed</xhtml:div>
                            <xhtml:div class="term">ParameterKey</xhtml:div>
                            <xhtml:div class="definition">Column_17</xhtml:div>
                            <xhtml:div class="term">Description</xhtml:div>
                            <xhtml:div class="definition">Made from aberration-corrected flow velocity</xhtml:div>
                            <xhtml:div class="term">Cadence</xhtml:div>
                            <xhtml:div class="definition">PT3M</xhtml:div>
                            <xhtml:div class="term">Units</xhtml:div>
                            <xhtml:div class="definition">km/s</xhtml:div>
                            <xhtml:div class="term">Particle</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">ParticleType</xhtml:div>
                                <xhtml:div class="definition">Ion</xhtml:div>
                                <xhtml:div class="term">ParticleQuantity</xhtml:div>
                                <xhtml:div class="definition">FlowSpeed</xhtml:div>
                            </xhtml:div>
                        </xhtml:div>
                        <xhtml:div class="parameter">Parameter #4</xhtml:div>
                        <xhtml:div class="definition">
                            <xhtml:div class="term">Name</xhtml:div>
                            <xhtml:div class="definition">Flow direction angles</xhtml:div>
                            <xhtml:div class="term">Description</xhtml:div>
                            <xhtml:div class="definition">Both aberrated (columns 10 and 11) and unaberrated (columns 15 and 16) flow directions are given, first longitude then latitude.</xhtml:div>
                            <xhtml:div class="term">Cadence</xhtml:div>
                            <xhtml:div class="definition">PT3M</xhtml:div>
                            <xhtml:div class="term">Units</xhtml:div>
                            <xhtml:div class="definition">deg</xhtml:div>
                            <xhtml:div class="term">CoordinateSystem</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">CoordinateRepresentation</xhtml:div>
                                <xhtml:div class="definition">Spherical</xhtml:div>
                                <xhtml:div class="term">CoordinateSystemName</xhtml:div>
                                <xhtml:div class="definition">GSE</xhtml:div>
                            </xhtml:div>
                            <xhtml:div class="term">Structure</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">Size</xhtml:div>
                                <xhtml:div class="definition">2 2</xhtml:div>
                                <xhtml:div class="term">Description</xhtml:div>
                                <xhtml:div class="definition">Flow latitude and longitude angles, aberrated and unaberrated</xhtml:div>
                            </xhtml:div>
                            <xhtml:div class="term">Particle</xhtml:div>
                            <xhtml:div class="definition">
                                <xhtml:div class="term">ParticleType</xhtml:div>
                                <xhtml:div class="definition">Ion</xhtml:div>
                                <xhtml:div class="term">ParticleQuantity</xhtml:div>
                                <xhtml:div class="definition">ArrivalDirection</xhtml:div>
                            </xhtml:div>
                        </xhtml:div>
                    </xhtml:div>
                </xhtml:div>
            </xhtml:div>
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                <xhtml:div class="footer-item">Responsible NASA Official: <xhtml:a style="all: revert" href="mailto:Robert.M.Candey@nasa.gov">Robert M. Candey</xhtml:a>
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                    <xhtml:span>Last Updated: 2025-12-04</xhtml:span>
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