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

<https://gcmd.earthdata.nasa.gov/kms/concept/8d6321dd-06d5-4d8a-a33a-00ee00afe41f>
  ns0:altLabel [ ] ;
  skos:definition """BlackJack (GPS Flight Receiver), a new generation instrument of TRSR (TurboRogue Space Receiver) heritage, provided by JPL (see description under CHAMP). The objective is to use the GPS instrument for navigation (precise orbit determination) and radio-occultation (refractive occultation monitoring) applications. BlackJack features three antennas, the main zenith crossed dipole antenna is used to collect the navigation data. In addition, a backup crossed dipole antenna and one helix antenna on the aft panel are used for back-up navigation and atmospheric occultation data collection, respectively. This system is capable of simultaneously tracking up to 24 dual frequency signals. In addition, this system provides digital signal processing functions for the KBR and SCA instruments as well.

Information obtained from http://www.eoportal.org/


Group: Instrument_Details
   Entry_ID: BLACKJACK
   Group: Instrument_Identification
      Instrument_Category: Earth Remote Sensing Instruments
      Instrument_Class: Passive Remote Sensing
      Instrument_Type: Positioning/Navigation
      Instrument_Subtype: GPS
      Short_Name: BLACKJACK
      Long_Name: Global Positiong System
   End_Group
   Group: Associated_Platforms
      Short_Name: GRACE
      Short_Name: CHAMP
   End_Group
   Online_Resource: http://directory.eoportal.org/get_announce.php?an_id=7317
   Creation_Date: 2008-07-18
   Group: Instrument_Logistics
      Instrument_Owner: USA/NASA
   End_Group
End_Group"""@en ;
  skos:prefLabel "BLACKJACK"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/47d0c7c0-683c-42a9-b53b-53b684972b52> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/47d0c7c0-683c-42a9-b53b-53b684972b52>
  skos:prefLabel "GPS"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/8d6321dd-06d5-4d8a-a33a-00ee00afe41f> .