<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href="http://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1700.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<Product_Observational xmlns="http://pds.nasa.gov/pds4/pds/v1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pds.nasa.gov/pds4/pds/v1 http://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1700.xsd">
  <Identification_Area>
    <logical_identifier>urn:nasa:pds:izenberg_pdart14_meap:data_eetable:ele_evt_12hr_orbit_2011-2012</logical_identifier>
    <version_id>1.0</version_id>
    <title>Mercury Energetic Electrons Events Table</title>
    <information_model_version>1.7.0.0</information_model_version>
    <product_class>Product_Observational</product_class>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2017-02-09</modification_date>
        <version_id>1.0</version_id>
        <description>Izenberg PDART 2014 MEAP Energetic Electron Events Table. 12 hr orbit 2011-2012.</description>
      </Modification_Detail>
    </Modification_History>
  </Identification_Area>
  <Observation_Area>
    <Time_Coordinates>
      <start_date_time>2011-03-25Z</start_date_time>
      <stop_date_time>2012-04-15Z</stop_date_time>
    </Time_Coordinates>
    <Primary_Result_Summary>
      <purpose>Science</purpose>
      <processing_level>Derived</processing_level>
      <description>Data from the MESSENGER Neutron Spectrometer (NS) have been used to detect
              and characterize energetic electron (EE) events within Mercury's magnetosphere.</description>
    </Primary_Result_Summary>
    <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>
      <name>MESSENGER NS</name>
      <Observing_System_Component>
        <name>MESSENGER</name>
        <type>Spacecraft</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.mess</lid_reference>
          <reference_type>is_instrument_host</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>NS</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:ns.mess</lid_reference>
          <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>collection_to_target</reference_type>
      </Internal_Reference>
    </Target_Identification>
  </Observation_Area>
  <Reference_List>
    <External_Reference>
      <doi>10.1126/science.1211141</doi>
      <reference_text>Ho et al., 2011, MESSENGER observations of transient bursts of 
               energetic electrons in Mercury's magnetosphere, Science, 333, 1865-8.
            </reference_text>
    </External_Reference>
  </Reference_List>
  <File_Area_Observational>
    <File>
      <file_name>ele_evt_12hr_orbit_2011-2012_truncated.tab</file_name>
      <creation_date_time>2017-02-09T12:44:00Z</creation_date_time>
      <file_size unit="byte">2124</file_size>
    </File>
    <Header>
      <offset unit="byte">0</offset>
      <object_length unit="byte">354</object_length>
      <parsing_standard_id>7-Bit ASCII Text</parsing_standard_id>
      <description>The first row of the table contains column headings.</description>
    </Header>
    <Table_Character>
      <name>Energetic Electron events, 12 hour orbit, 2011-2012</name>
      <offset unit="byte">354</offset>
      <records>5</records>
      <record_delimiter>Carriage-Return Line-Feed</record_delimiter>
      <Record_Character>
        <fields>22</fields>
        <groups>0</groups>
        <record_length unit="byte">354</record_length>
        <Field_Character>
          <name>Event Number</name>
          <field_number>1</field_number>
          <field_location unit="byte">1</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>EE event number. The value is repeated for 'Event 
                      Length' rows in the file.</description>
        </Field_Character>
        <Field_Character>
          <name>Event Length</name>
          <field_number>2</field_number>
          <field_location unit="byte">17</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Number of 20-second accumulations.  The value is repeated 
                      for 'Event Length' rows in the file.</description>
        </Field_Character>
        <Field_Character>
          <name>Day of Year</name>
          <field_number>3</field_number>
          <field_location unit="byte">33</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Day of year on which the 20-second accumulation 
                      occurs.</description>
        </Field_Character>
        <Field_Character>
          <name>Month</name>
          <field_number>4</field_number>
          <field_location unit="byte">49</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Month in which the 20-second accumulation 
                      occurs.</description>
        </Field_Character>
        <Field_Character>
          <name>Day</name>
          <field_number>5</field_number>
          <field_location unit="byte">65</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Day in the month in which the 20-second 
                      accumulation occurs.</description>
        </Field_Character>
        <Field_Character>
          <name>Year</name>
          <field_number>6</field_number>
          <field_location unit="byte">81</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Year in which the 20-second accumulation 
                      occurs.</description>
        </Field_Character>
        <Field_Character>
          <name>Hour</name>
          <field_number>7</field_number>
          <field_location unit="byte">97</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Hour within the day in which the 20-second 
                      accumulation occurs.</description>
        </Field_Character>
        <Field_Character>
          <name>Minute</name>
          <field_number>8</field_number>
          <field_location unit="byte">113</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Minute within the hour in which the 20-second 
                      accumulation occurs.</description>
        </Field_Character>
        <Field_Character>
          <name>Second</name>
          <field_number>9</field_number>
          <field_location unit="byte">129</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Second within the minute in which the 
                      20-second accumulation occurs.</description>
        </Field_Character>
        <Field_Character>
          <name>MET</name>
          <field_number>10</field_number>
          <field_location unit="byte">145</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>s</unit>
          <description>Mission elapsed time, and is the mission tag 
                      time in seconds of the start of the associated 
                      accumulated period.</description>
        </Field_Character>
        <Field_Character>
          <name>Orbit Number</name>
          <field_number>11</field_number>
          <field_location unit="byte">161</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Unique identifier for a given orbit of 
                      MESSENGER around Mercury. Orbit number is defined as 
                      starting at apoherm and is calculated using the MET 
                      value and the appropriate SPICE kernels. Orbit 
                      numbering does not start until MESSENGER performs the 
                      Mercury orbit insertion. Until that time the value for 
                      orbit number is 0.</description>
        </Field_Character>
        <Field_Character>
          <name>Altitude</name>
          <field_number>12</field_number>
          <field_location unit="byte">177</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>km</unit>
          <description>Spacecraft altitude above the subsatellite 
                      point on the target in units of km.</description>
        </Field_Character>
        <Field_Character>
          <name>Latitude</name>
          <field_number>13</field_number>
          <field_location unit="byte">193</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>deg</unit>
          <description>Target-centric latitude of the spacecraft 
                      subsatellite point in degrees.</description>
        </Field_Character>
        <Field_Character>
          <name>Longitude</name>
          <field_number>14</field_number>
          <field_location unit="byte">209</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>deg</unit>
          <description>Target-centric longitude of the spacecraft 
                      subsatellite point in degrees.</description>
        </Field_Character>
        <Field_Character>
          <name>Local Time</name>
          <field_number>15</field_number>
          <field_location unit="byte">225</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>hr</unit>
          <description>Local time of the spacecraft subsatellite 
                      point in hours from 0 to 24.</description>
        </Field_Character>
        <Field_Character>
          <name>Beta Angle</name>
          <field_number>16</field_number>
          <field_location unit="byte">241</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>deg</unit>
          <description>Angle of the normal of the spacecraft 
                      orbital plane with respect to Mercury-to-Sun vector 
                      in degrees.</description>
        </Field_Character>
        <Field_Character>
          <name>Sun Distance</name>
          <field_number>17</field_number>
          <field_location unit="byte">257</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>km</unit>
          <description>Distance of the spacecraft to the Sun in 
                      units of km.</description>
        </Field_Character>
        <Field_Character>
          <name>Periapsis Latitude</name>
          <field_number>18</field_number>
          <field_location unit="byte">273</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>deg</unit>
          <description>Target-centric latitude of the spacecraft 
                      when it is at the periapsis (lowest) altitude for the 
                      given orbit number.</description>
        </Field_Character>
        <Field_Character>
          <name>Event Length Minute</name>
          <field_number>19</field_number>
          <field_location unit="byte">289</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>min</unit>
          <description>Length of the EE event in minutes. The 
                      value is repeated for 'Event Length' rows in the file.
                      </description>
        </Field_Character>
        <Field_Character>
          <name>SN</name>
          <field_number>20</field_number>
          <field_location unit="byte">305</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <unit>none</unit>
          <description>Event signal-to-noise, and is the measure 
                      of the size of the event within each 20-second 
                      accumulation.</description>
        </Field_Character>
        <Field_Character>
          <name>BP_TOT</name>
          <field_number>21</field_number>
          <field_location unit="byte">321</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Total counts within the Borated Plastic 
                      sensor, 64-channel, 20-s spectral accumulation.</description>
        </Field_Character>
        <Field_Character>
          <name>BP_LOW</name>
          <field_number>22</field_number>
          <field_location unit="byte">337</field_location>
          <data_type>ASCII_Real</data_type>
          <field_length unit="byte">16</field_length>
          <description>Total counts within the lowest 12 channels 
                      of the Borated Plastic sensor, 64-channel, 20-s spectral 
                      accumulation.</description>
          <Special_Constants>
              <!-- added for testing purpose -->
            <missing_constant>-9.99</missing_constant>
          </Special_Constants>
        </Field_Character>
      </Record_Character>
    </Table_Character>
  </File_Area_Observational>
</Product_Observational>
