@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/0c52630e-cc77-42ab-b1ae-cb736486200e>
  skos:prefLabel "EXPLORER"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/84d39d18-7ae4-4f86-9626-694de58da933> .

<https://gcmd.earthdata.nasa.gov/kms/concept/84d39d18-7ae4-4f86-9626-694de58da933>
  ns0:altLabel [ ] ;
  skos:definition """Explorer 9 was the first in a series of 3.66-m inflatable spheres placed into orbit solely for the determination of atmospheric densities. The spacecraft consisted of alternating layers of aluminum foil and plastic film. Uniformly distributed over the aluminum surface were 5.1-cm dots of white paint for thermal control. Explorer 9 carried a 136-MHz beacon for tracking purposes. The beacon failed on the first orbit however, and the SAO Baker-Nunn camera network had to be relied upon for tracking. The spacecraft reentered the earth's atmosphere on April 9, 1964.


Group: Platform_Details
   Entry_ID: EXPLORER-9
   Group: Platform_Identification
      Platform_Category: Balloons/Rockets
      Short_Name: EXPLORER 9
      Long_Name: Air Density Balloon
   End_Group
   Group: Synonymous_Platform_Names
      Short_Name: Explorer-9
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: OPTICAL BEACON
      Short_Name: OPTICAL TRACKING
      Short_Name: SATELLITE RADIO BEACON
   End_Group
   Group: Orbit
      Orbit_Inclination: 38.91degrees
      Perigee: 545 km
      Apogee: 2225 km
   End_Group
   Creation_Date: 2007-08-21
   Online_Resource: http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1961-004A
   Group: Platform_Logistics
      Launch_Date: 1961-02-16
      Launch_Site: Wallops Flight Facility, Wallops Island, USA
      Primary_Sponsor: NASA
   End_Group
End_Group"""@en ;
  skos:prefLabel "EXPLORER-9"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/0c52630e-cc77-42ab-b1ae-cb736486200e> ;
  a skos:Concept .