@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://gcmd.gsfc.nasa.gov/kms#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/b003a4a0-0dc3-498b-9795-a197e25cff6c>
  skos:prefLabel "NASA Medium Class Explorers (MIDEX)"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/6524ba60-7265-49ae-b368-c18d981e7381> .

<https://gcmd.earthdata.nasa.gov/kms/concept/6524ba60-7265-49ae-b368-c18d981e7381>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:definition """[Source: NASA THEMIS Mission Home Page, http://www.nasa.gov/mission_pages/themis/mission/ ]

NASA's Time History of Events and Macroscale Interactions during Substorms (THEMIS) aims to resolve one of the oldest mysteries in space physics, namely to determine what physical process in near-Earth space initiates the violent eruptions of the aurora that occur during substorms in the Earth's magnetosphere.

THEMIS is a 2-year mission consisting of 5 identical probes that will study the violent colorful eruptions of Auroras.

For the first time NASA will launch a constellation of five satellites to study substorms. The THEMIS probes will line up over North America once every four days. Over the mission’s two-year lifetime, the probes should be able to observe some 30 substorms.

THEMIS is the fifth medium-class mission under NASA's Explorer Program, which was conceived to provide frequent flight opportunities for world-class scientific investigations from space within the Heliophysics and Astrophysics science areas. The Explorers Program Office at Goddard Space Flight Center, Greenbelt, Md., manages this NASA-funded mission. The University of California, Berkeley's Space Sciences Laboratory and Swales Aerospace, Beltsville, Md., built the THEMIS probes.


Group: Platform_Details
   Entry_ID: THEMIS
   Group: Platform_Identification
      Platform_Category: Solar/Space Observation Satellites
      Platform_Series_or_Entity: NASA Medium Class Explorers (MIDEX)
      Short_Name: THEMIS
      Long_Name: Time History of Events and Macroscale Interactions During Substorms
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: THEMIS-SST
      Short_Name: THEMIS-ESA
      Short_Name: THEMIS-FGM
      Short_Name: THEMIS-EFI
      Short_Name: SCM
   End_Group
   Group: Orbit
      Orbit_Type: HEO > Highly Elliptical Orbit
   End_Group
   Creation_Date: 2008-07-17
   Online_Resource: http://www.nasa.gov/mission_pages/themis/main/
   Online_Resource: http://themis.ssl.berkeley.edu/
   Online_Resource: http://www.atk.com/Customer_Solutions_SpaceSystems/cs_ss_spacesys_ssp_ppcs-themis.asp
   Sample_Image: http://www.nasa.gov/images/content/164405main_THEMIS-Spacecraft_bus2.jpg
   Group: Platform_Logistics
      Launch_Date: 2007-02-17
      Launch_Site: Cape Canaveral/Kennedy Space Center, USA
      Primary_Sponsor: USA/NASA
   End_Group
End_Group"""@en ;
  skos:prefLabel "THEMIS"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/b003a4a0-0dc3-498b-9795-a197e25cff6c> ;
  a skos:Concept .