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    <Identification_Area>
        <logical_identifier>urn:nasa:pds:uranus_occ_u137_hst_fos:data</logical_identifier>
        <version_id>2.0</version_id>
        <title>Data Collection for Uranus System Occultation of Star u137 (UCAC3 141-413386) Observed from the HST FOS.</title>
        <information_model_version>1.14.0.0</information_model_version>
        <product_class>Product_Collection</product_class>
        <Citation_Information>
            <author_list>French, Richard G.; McGhee-French, Colleen A.; Gordon, Mitchell K.</author_list>
            <publication_year>2020</publication_year>
            <keyword>uranus atmosphere</keyword>                                     
            <keyword>uranus atmosphere stellar occultation</keyword>                 
            <keyword>uranus atmosphere stellar occultation time series</keyword>     
            <keyword>uranus rings</keyword>
            <keyword>uranus rings stellar occultation</keyword>
            <keyword>uranus rings stellar occultation radial profiles</keyword>
            <description>This collection contains calibrated and derived data resulting from the occultation of star u137 (UCAC3 141-413386) by the rings and atmosphere of Uranus.</description>
        </Citation_Information>
        <Modification_History>
            <Modification_Detail>
                <modification_date>2021-04-05</modification_date>
                <version_id>1.0</version_id>
                <description>Initial version</description>
            </Modification_Detail>
            <Modification_Detail>
                <modification_date>2024-04-23</modification_date>
                <version_id>2.0</version_id>
		<description>Corrected HST instrument name from WFC3 to FOS, and updated the corresponding LIDVIDS in collection_data.csv. Also, updated LIDVID reference to fitted model in this label. </description>
            </Modification_Detail>
         </Modification_History>
    </Identification_Area>
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            <start_date_time>1996-03-16T15:25:38.0963Z</start_date_time>
            <stop_date_time>1996-03-16T15:42:42.6512Z</stop_date_time>
        </Time_Coordinates>
        <Primary_Result_Summary>
            <purpose>Science</purpose>
            <processing_level>Derived</processing_level>
            <description>This collection contains calibrated and derived data resulting from the occultation of star u137 (UCAC3 141-413386) by the rings and atmosphere of Uranus.</description>
            <Science_Facets>
                <wavelength_range>Visible</wavelength_range>
                <discipline_name>Atmospheres</discipline_name>
                <facet1>Structure</facet1>
            </Science_Facets>
            <Science_Facets>
                <wavelength_range>Visible</wavelength_range>
                <discipline_name>Ring-Moon Systems</discipline_name>
                <facet1>Ring Occultation Profile</facet1>
            </Science_Facets>
        </Primary_Result_Summary>
        <Investigation_Area>
            <name>Earth-based Observations of Uranus System Stellar Occultations</name>
            <type>Observing Campaign</type>
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                <lid_reference>urn:nasa:pds:context:investigation:observing_campaign.earth-based-uranus-stellar-occultations</lid_reference>
                <reference_type>collection_to_investigation</reference_type>
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        <name>Hubble Space Telescope</name>
        <type>Host</type>
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        <name>HST Faint Object Spectrograph</name>
        <type>Instrument</type>
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            <name>Uranus</name>
            <alternate_designation>NAIF ID 799</alternate_designation>
            <type>Planet</type>
            <description>
                NAIF ID: 799;
                Center of motion: Sun;
                LID of central body: urn:nasa:pds:context:target:sun.sun;
                NAIF ID of central body: 10.
            </description>
            <Internal_Reference>
                <lid_reference>urn:nasa:pds:context:target:planet.uranus</lid_reference>
                <reference_type>collection_to_target</reference_type>
            </Internal_Reference>
        </Target_Identification>
        <Discipline_Area>
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                <geom:SPICE_Kernel_Files>
                    <geom:SPICE_Kernel_Identification>
                        <geom:kernel_type>SPK</geom:kernel_type>
                        <geom:spice_kernel_file_name>ura111.bsp</geom:spice_kernel_file_name>
                    </geom:SPICE_Kernel_Identification>
                    <geom:SPICE_Kernel_Identification>
                        <geom:kernel_type>SPK</geom:kernel_type>
                        <geom:spice_kernel_file_name>vgr2.ura111.bsp</geom:spice_kernel_file_name>
                    </geom:SPICE_Kernel_Identification>
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                        <geom:kernel_type>SPK</geom:kernel_type>
                        <geom:spice_kernel_file_name>earthstns_itrf93_040916.bsp</geom:spice_kernel_file_name>
                    </geom:SPICE_Kernel_Identification>
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                        <geom:kernel_type>BPC</geom:kernel_type>
                        <geom:spice_kernel_file_name>earth_720101_031229.bpc</geom:spice_kernel_file_name>
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                        <geom:kernel_type>LSK</geom:kernel_type>
                        <geom:spice_kernel_file_name>naif0012.tls</geom:spice_kernel_file_name>
                    </geom:SPICE_Kernel_Identification>
                    <geom:comment>These kernel files were used in the generation of the products in the parent bundle. Some or all of them may not have been used directly in the generation of this product.</geom:comment>
                </geom:SPICE_Kernel_Files>
            </geom:Geometry>
        </Discipline_Area>
    </Context_Area>
    <Reference_List>
        <Internal_Reference>
              <lid_reference>urn:nasa:pds:context:resource:resource.uranus_occ_u137_hst_fos_online</lid_reference>
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           </Internal_Reference>
           <Internal_Reference>
            <lid_reference>urn:nasa:pds:uranus_occ_support:document:earth-based-uranus-stellar-occultations-user-guide</lid_reference>            
            <reference_type>collection_to_document</reference_type>
            <comment>The User Guide for Earth-based Uranus Stellar Occultations.</comment>
        </Internal_Reference>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:uranus_occ_u137_hst_fos:browse:540nm_obs_geom</lid_reference>            
            <reference_type>collection_to_browse</reference_type>
            <comment>Diagram of the Uranus system showing the occultation track.</comment>
        </Internal_Reference>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:uranus_occ_u137_hst_fos:browse:540nm_earth</lid_reference>            
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            <comment>Diagram of the view of the Earth from Uranus at mid-occultation Time.</comment>
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        <Internal_Reference>
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            <reference_type>collection_to_browse</reference_type>
            <comment>Low resolution plot of counts vs. time for the entire occultation.</comment>
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        <Internal_Reference>
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            <reference_type>collection_to_browse</reference_type>
            <comment>Illustrates some of the processing steps involved in normalizing a time-series occultation light curve from counts per second to units of stellar flux.</comment>
        </Internal_Reference>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:uranus_occ_u137_hst_fos:browse:540nm_ring_sqw_gallery</lid_reference>
            <reference_type>collection_to_browse</reference_type>
            <comment>Gallery of square-well diffraction model fits to individual ring profiles.</comment>
        </Internal_Reference>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:uranus_occ_support</lid_reference>
            <reference_type>collection_to_resource</reference_type>
            <comment>The support bundle for all of the Earth-based Uranus system occultations.</comment>
        </Internal_Reference>
        <Internal_Reference>
            <lidvid_reference>urn:nasa:pds:uranus_occ_support:data:uranus_occultation_ring_fit_rfrench_20201201::1.1</lidvid_reference>
            <reference_type>collection_to_resource</reference_type>
            <comment>The fitted model of the ring system upon which the data are based.</comment>
        </Internal_Reference>
        <External_Reference>
            <reference_text>Elliot et al. (1984). "Structure of the Uranian rings. I. Square-well model and particle-size constraints" Astron J. 89, 1587-1603. http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1984AJ.....89.1587E&amp;data_type=PDF_HIGH&amp;whole_paper=YES&amp;type=PRINTER&amp;filetype=.pdf</reference_text>
        </External_Reference>
    </Reference_List>
    <Collection>
        <collection_type>Data</collection_type>
    </Collection>
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        <File>
            <file_name>collection_data.csv</file_name>
            <creation_date_time>2024-04-23T17:02:16Z</creation_date_time>
            <records>29</records>
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