@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/820b20d7-03b3-43a3-9c7a-f28fa3b0bfe2>
  skos:prefLabel "ETALON"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/c9c07cf0-49eb-4c7f-aeff-2e95caae9500> .

<https://gcmd.earthdata.nasa.gov/kms/concept/c9c07cf0-49eb-4c7f-aeff-2e95caae9500>
  ns0:resource [ ] ;
  skos:definition """Etalon are a Russian family (Etalon-1, Etalon-2) of passive geodetic satellites dedicated to satellite laser ranging. Etalon-1 was the first geodynamic satellite launched by the former Soviet Union. The Etalon spacecraft were launched in 1989 in conjunction with a pair of GLObal'naya NAvigatisionnay Sputnikovaya Sistema (GLONASS) satellites. The mission objectives were to determine a high accuracy terrestrial reference frame and earth rotation parameters, to improve the gravity field, and to improve the gravitational constant.

[Summary provided by NASA.]


Group: Platform_Details
   Entry_ID: ETALON-2
   Group: Platform_Identification
      Platform_Category: Earth Observation Satellites
      Platform_Series_or_Entity: ETALON
      Short_Name: ETALON-2
   End_Group
   Group: Synonymous_Platform_Names
      Short_Name: ETALON-2
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: RIS
   End_Group
   Group: Orbit
      Orbit_Inclination: 65.5 deg
      Period: 675 min
      Perigee: 19120 km
      Apogee: 19120 km
      Orbit_Type: HEO > Highly Elliptical Orbit
   End_Group
   Creation_Date: 2007-09-26
   Online_Resource: http://ilrs.gsfc.nasa.gov/satellite_missions/list_of_satellites/eta1_general.html
   Sample_Image: http://ilrs.gsfc.nasa.gov/images/etalon.gif
   Group: Platform_Logistics
      Launch_Date: 1989-05-31
      Primary_Sponsor: Russia
   End_Group
End_Group"""@en ;
  skos:prefLabel "ETALON-2"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/820b20d7-03b3-43a3-9c7a-f28fa3b0bfe2> ;
  a skos:Concept .