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<Product_Observational xmlns="http://pds.nasa.gov/pds4/pds/v1" 
    xmlns:mess="http://pds.nasa.gov/pds4/mission/mess/v1" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://pds.nasa.gov/pds4/pds/v1 https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1A10.xsd   http://pds.nasa.gov/pds4/mission/mess/v1 https://pds.nasa.gov/pds4/mission/mess/v1/PDS4_MESS_1B00_1020.xsd">
  <Identification_Area>
    <logical_identifier>urn:nasa:pds:mess_grs_derived:data_cdr:grs_rss2011129zzz_dat</logical_identifier>
    <version_id>1.0</version_id>
    <title>MESSENGER GRS Spectra Sum Product: grs_rss2011129zzz_dat</title>
    <information_model_version>1.10.1.0</information_model_version>
    <product_class>Product_Observational</product_class>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2018-07-03</modification_date>
        <version_id>1.0</version_id>
        <description>PDS4 migrated product.</description>
      </Modification_Detail>
    </Modification_History>
  </Identification_Area>
  <Observation_Area>
    <Time_Coordinates>
      <start_date_time>2011-05-09T19:58:04.713Z</start_date_time>
      <stop_date_time>2011-09-10T19:20:40.232Z</stop_date_time>
    </Time_Coordinates>
    <Investigation_Area>
      <name>MESSENGER</name>
      <type>Mission</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:investigation:mission.messenger</lid_reference>
        <reference_type>data_to_investigation</reference_type>
      </Internal_Reference>
    </Investigation_Area>
    <Observing_System>
      <Observing_System_Component>
        <name>MESSENGER</name>
        <type>Spacecraft</type>
        <Internal_Reference>
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      <Observing_System_Component>
        <name>Gamma Ray Spectrometer</name>
        <type>Instrument</type>
        <Internal_Reference>
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          <reference_type>is_instrument</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
    </Observing_System>
    <Target_Identification>
      <name>Mercury</name>
      <type>Planet</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:target:planet.mercury</lid_reference>
        <reference_type>data_to_target</reference_type>
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    </Target_Identification>
    <Mission_Area>
      <mess:MESSENGER>
        <mess:mission_phase_name>Mercury Orbit</mess:mission_phase_name>
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        <mess:software_version_id>1.0</mess:software_version_id>
      </mess:MESSENGER>
    </Mission_Area>
  </Observation_Area>
  <File_Area_Observational>
    <File>
      <file_name>grs_rss2011129zzz.dat</file_name>
      <creation_date_time>2015-10-20T09:50:17Z</creation_date_time>
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    <Table_Binary>
      <offset unit="byte">0</offset>
      <records>1</records>
      <description>
        This table contains one set of summed spectra    
        collected from the high purity Germanium (HPGe) detector plus
        spatial and temporal information and relevant data from the
        time the spectra was taken. A set is defined as all data with
        timestamps corresponding to one earth year period.
      </description>
      <Record_Binary>
        <fields>48</fields>
        <groups>4</groups>
        <record_length unit="byte">262373</record_length>
        <Field_Binary>
          <name>mercury_centric_latitude</name>
          <field_number>1</field_number>
          <field_location unit="byte">1</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Weighted centerpoint Mercury centric latitude by where spectra were taken over the area of the sum.</description>
        </Field_Binary>
        <Field_Binary>
          <name>mercury_centric_longitude</name>
          <field_number>2</field_number>
          <field_location unit="byte">5</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Weighted centerpoint Mercury centric east longitude by where spectra were taken over the area of the sum.</description>
        </Field_Binary>
        <Field_Binary>
          <name>utc_start_time</name>
          <field_number>3</field_number>
          <field_location unit="byte">9</field_location>
          <data_type>ASCII_String</data_type>
          <field_length unit="byte">23</field_length>
          <description>UTC time of first spectrum in sum.</description>
        </Field_Binary>
        <Field_Binary>
          <name>utc_stop_time</name>
          <field_number>4</field_number>
          <field_location unit="byte">32</field_location>
          <data_type>ASCII_String</data_type>
          <field_length unit="byte">23</field_length>
          <description>UTC time of last spectrum in sum.</description>
        </Field_Binary>
        <Field_Binary>
          <name>met_start_time</name>
          <field_number>5</field_number>
          <field_location unit="byte">55</field_location>
          <data_type>UnsignedMSB4</data_type>
          <field_length unit="byte">4</field_length>
          <description>Time of first spectrum in sum, in units of spacecraft clock (second).</description>
        </Field_Binary>
        <Field_Binary>
          <name>met_stop_time</name>
          <field_number>6</field_number>
          <field_location unit="byte">59</field_location>
          <data_type>UnsignedMSB4</data_type>
          <field_length unit="byte">4</field_length>
          <description>Time of last spectrum in sum, in units of spacecraft clock (seconds).</description>
        </Field_Binary>
        <Field_Binary>
          <name>sum_type</name>
          <field_number>7</field_number>
          <field_location unit="byte">63</field_location>
          <data_type>UnsignedByte</data_type>
          <field_length unit="byte">1</field_length>
          <description>
            The type of sum, 
            0 - Full Planet, 
            1 - Full Planet less than 2000 kilometer altitude, 
            2 - Full Planet altitude between 2000 and 8000 kilometers, 
            3 - Full Planet altitude greater than 8000 kilometers, 
            4 - Full Planet altitude greater than 15000 kilometers, 
            5 - North pole (latitude &gt;= 80) with altitude less than 2000 kilometers, 
            6 - 15 x 15 degree cells above 45 degrees latitude with altitude less than 2000 kilometers, 
            7 - 45 x 45 degree cells between 0 and 45 degrees latitude with altitude less than 2000 kilometers. 
          </description>
        </Field_Binary>
        <Field_Binary>
          <name>clock_time</name>
          <field_number>8</field_number>
          <field_location unit="byte">64</field_location>
          <data_type>UnsignedMSB8</data_type>
          <field_length unit="byte">8</field_length>
          <description>Sum of collection durations.</description>
        </Field_Binary>
        <Field_Binary>
          <name>record_count</name>
          <field_number>9</field_number>
          <field_location unit="byte">72</field_location>
          <data_type>UnsignedMSB4</data_type>
          <field_length unit="byte">4</field_length>
          <description>Count of spectra being summed.</description>
        </Field_Binary>
        <Field_Binary>
          <name>bad_data_flag</name>
          <field_number>10</field_number>
          <field_location unit="byte">76</field_location>
          <data_type>UnsignedMSB2</data_type>
          <field_length unit="byte">2</field_length>
          <description>Non-zero if any spectra had bad_data_flags set.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hpge_temp_1_min</name>
          <field_number>11</field_number>
          <field_location unit="byte">78</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of HPGE Detector Temperature 1.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hpge_temp_1_max</name>
          <field_number>12</field_number>
          <field_location unit="byte">82</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of HPGE Detector Temperature 1.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hpge_temp_1_mean</name>
          <field_number>13</field_number>
          <field_location unit="byte">86</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of HPGE Detector Temperature 1.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hpge_temp_1_std</name>
          <field_number>14</field_number>
          <field_location unit="byte">90</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of HPGE Detector Temperature 1.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hpge_temp_2_min</name>
          <field_number>15</field_number>
          <field_location unit="byte">94</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of HPGE Detector Temperature 2.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hpge_temp_2_max</name>
          <field_number>16</field_number>
          <field_location unit="byte">98</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of HPGE Detector Temperature 2.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hpge_temp_2_mean</name>
          <field_number>17</field_number>
          <field_location unit="byte">102</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of HPGE Detector Temperature 2.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hpge_temp_2_std</name>
          <field_number>18</field_number>
          <field_location unit="byte">106</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of HPGE Detector Temperature 2.</description>
        </Field_Binary>
        <Field_Binary>
          <name>calib_avg_det_temp_min</name>
          <field_number>19</field_number>
          <field_location unit="byte">110</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of Calibrated, averaged detector temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>calib_avg_det_temp_max</name>
          <field_number>20</field_number>
          <field_location unit="byte">114</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of Calibrated, averaged detector temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>calib_avg_det_temp_mean</name>
          <field_number>21</field_number>
          <field_location unit="byte">118</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of Calibrated, averaged detector temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>calib_avg_det_temp_std</name>
          <field_number>22</field_number>
          <field_location unit="byte">122</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of Calibrated, averaged detector temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>preamp_temp_min</name>
          <field_number>23</field_number>
          <field_location unit="byte">126</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of Pre Amp Temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>preamp_temp_max</name>
          <field_number>24</field_number>
          <field_location unit="byte">130</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of Pre Amp Temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>preamp_temp_mean</name>
          <field_number>25</field_number>
          <field_location unit="byte">134</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of Pre Amp Temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>preamp_temp_std</name>
          <field_number>26</field_number>
          <field_location unit="byte">138</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of Pre Amp Temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>shaper_temp_min</name>
          <field_number>27</field_number>
          <field_location unit="byte">142</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of Shaper Temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>shaper_temp_max</name>
          <field_number>28</field_number>
          <field_location unit="byte">146</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of Shaper Temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>shaper_temp_mean</name>
          <field_number>29</field_number>
          <field_location unit="byte">150</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of Shaper Temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>shaper_temp_std</name>
          <field_number>30</field_number>
          <field_location unit="byte">154</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of Shaper Temperature.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hv_monitor_min</name>
          <field_number>31</field_number>
          <field_location unit="byte">158</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of High Voltage Monitor.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hv_monitor_max</name>
          <field_number>32</field_number>
          <field_location unit="byte">162</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of High Voltage Monitor.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hv_monitor_mean</name>
          <field_number>33</field_number>
          <field_location unit="byte">166</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of High Voltage Monitor.</description>
        </Field_Binary>
        <Field_Binary>
          <name>hv_monitor_std</name>
          <field_number>34</field_number>
          <field_location unit="byte">170</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of High Voltage Monitor.</description>
        </Field_Binary>
        <Field_Binary>
          <name>altitude_min</name>
          <field_number>35</field_number>
          <field_location unit="byte">174</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of Altitude in kilometers.</description>
        </Field_Binary>
        <Field_Binary>
          <name>altitude_max</name>
          <field_number>36</field_number>
          <field_location unit="byte">178</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of Altitude in kilometers.</description>
        </Field_Binary>
        <Field_Binary>
          <name>altitude_mean</name>
          <field_number>37</field_number>
          <field_location unit="byte">182</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of Altitude in kilometers.</description>
        </Field_Binary>
        <Field_Binary>
          <name>altitude_std</name>
          <field_number>38</field_number>
          <field_location unit="byte">186</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of Altitude.</description>
        </Field_Binary>
        <Field_Binary>
          <name>latitude_min</name>
          <field_number>39</field_number>
          <field_location unit="byte">190</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of Latitude in degrees.</description>
        </Field_Binary>
        <Field_Binary>
          <name>latitude_max</name>
          <field_number>40</field_number>
          <field_location unit="byte">194</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of Latitude in degrees.</description>
        </Field_Binary>
        <Field_Binary>
          <name>latitude_mean</name>
          <field_number>41</field_number>
          <field_location unit="byte">198</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of Latitude in degrees.</description>
        </Field_Binary>
        <Field_Binary>
          <name>latitude_std</name>
          <field_number>42</field_number>
          <field_location unit="byte">202</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of Latitude.</description>
        </Field_Binary>
        <Field_Binary>
          <name>longitude_min</name>
          <field_number>43</field_number>
          <field_location unit="byte">206</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Minimum value of Longitude in degrees.</description>
        </Field_Binary>
        <Field_Binary>
          <name>longitude_max</name>
          <field_number>44</field_number>
          <field_location unit="byte">210</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Maximum value of Longitude in degrees.</description>
        </Field_Binary>
        <Field_Binary>
          <name>longitude_mean</name>
          <field_number>45</field_number>
          <field_location unit="byte">214</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Mean value of Longitude in degrees.</description>
        </Field_Binary>
        <Field_Binary>
          <name>longitude_std</name>
          <field_number>46</field_number>
          <field_location unit="byte">218</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Standard Deviation of Longitude.</description>
        </Field_Binary>
        <Field_Binary>
          <name>gain</name>
          <field_number>47</field_number>
          <field_location unit="byte">222</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>Default value of gain, keV / channel.</description>
        </Field_Binary>
        <Field_Binary>
          <name>offset</name>
          <field_number>48</field_number>
          <field_location unit="byte">226</field_location>
          <data_type>IEEE754MSBSingle</data_type>
          <field_length unit="byte">4</field_length>
          <description>The offset, keV.</description>
        </Field_Binary>
        <Group_Field_Binary>
          <group_number>1</group_number>
          <repetitions>16384</repetitions>
          <fields>1</fields>
          <groups>0</groups>
          <group_location unit="byte">230</group_location>
          <group_length unit="byte">65536</group_length>
          <Field_Binary>
            <name>raw_gamma_spectrum</name>
            <field_number>1</field_number>
            <field_location unit="byte">1</field_location>
            <data_type>IEEE754MSBSingle</data_type>
            <field_length unit="byte">4</field_length>
            <description>
              Summed uncorrected raw gamma spectrum representing cumulative counts of gamma rays at the detector, 
              binned over SUM_TYPE latitude and longitude, and one earth year.
            </description>
          </Field_Binary>
        </Group_Field_Binary>
        <Group_Field_Binary>
          <group_number>2</group_number>
          <repetitions>16384</repetitions>
          <fields>1</fields>
          <groups>0</groups>
          <group_location unit="byte">65766</group_location>
          <group_length unit="byte">65536</group_length>
          <Field_Binary>
            <name>corrected_gamma_spectrum</name>
            <field_number>1</field_number>
            <field_location unit="byte">1</field_location>
            <data_type>IEEE754MSBSingle</data_type>
            <field_length unit="byte">4</field_length>
            <description>
              Summed corrected raw gamma spectrum representing cumulative counts of gamma rays at the detector, 
              binned over SUM_TYPE latitude and longitude, and one earth year. 
            </description>
          </Field_Binary>
        </Group_Field_Binary>
        <Group_Field_Binary>
          <group_number>3</group_number>
          <repetitions>16384</repetitions>
          <fields>1</fields>
          <groups>0</groups>
          <group_location unit="byte">131302</group_location>
          <group_length unit="byte">65536</group_length>
          <Field_Binary>
            <name>ac_gamma_spectrum</name>
            <field_number>1</field_number>
            <field_location unit="byte">1</field_location>
            <data_type>IEEE754MSBSingle</data_type>
            <field_length unit="byte">4</field_length>
            <description>
              Summed uncorrected anti-coincidence gamma spectrum representing cumulative counts of gamma rays at the detector, 
              binned over SUM_TYPE latitude and longitude, and one earth year.
            </description>
          </Field_Binary>
        </Group_Field_Binary>
        <Group_Field_Binary>
          <group_number>4</group_number>
          <repetitions>16384</repetitions>
          <fields>1</fields>
          <groups>0</groups>
          <group_location unit="byte">196838</group_location>
          <group_length unit="byte">65536</group_length>
          <Field_Binary>
            <name>corrected_ac_gamma_spectrum</name>
            <field_number>1</field_number>
            <field_location unit="byte">1</field_location>
            <data_type>IEEE754MSBSingle</data_type>
            <field_length unit="byte">4</field_length>
            <description>
              Summed corrected anti-coincidence gamma spectrum representing cumulative counts of gamma rays at the detector, 
              binned over SUM_TYPE latitude and longitude, and one earth year.
            </description>
          </Field_Binary>
        </Group_Field_Binary>
      </Record_Binary>
    </Table_Binary>
  </File_Area_Observational>
  <File_Area_Observational_Supplemental>
    <File>
      <file_name>grs_rss2011129zzz.lbl</file_name>
    </File>
    <Stream_Text>
      <offset unit="byte">0</offset>
      <parsing_standard_id>PDS3</parsing_standard_id>
      <description>Original PDS3 label</description>
      <record_delimiter>Carriage-Return Line-Feed</record_delimiter>
    </Stream_Text>
  </File_Area_Observational_Supplemental>
</Product_Observational>
