@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/4c4d88f6-a2e2-4394-81ac-b2919cb2efcd>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:definition """Single-frequency Solid State Radar Altimeter (SSALT, a.k.a. Poseidon-1) was an experimental instrument designed by CNES and intended to validate the accuracy, operation, and signal processing of a small-volume, lightweight, low-power altimeter. Poseidon-1 used the same antenna as the NASA altimeter and had similar operating principles and performance, but it only operated at a single frequency of 13.6 GHz. SSALT (Poseidon-1) was the predecessor of Poseidon-2, which is described in greater detail in the Jason entry.


Group: Instrument_Details
   Entry_ID: SSALT
   Group: Instrument_Identification
      Instrument_Category: Earth Remote Sensing Instruments
      Instrument_Class: Active Remote Sensing
      Instrument_Type: Altimeters
      Instrument_Subtype: Radar Altimeters
      Short_Name: SSALT
      Long_Name: POSEIDON Solid State Radar Altimeter
   End_Group
   Group: Associated_Platforms
      Short_Name: TOPEX/POSEIDON
   End_Group
   Group: Spectral_Frequency_Information
      Wavelength_Keyword: Microwave
      Spectral_Frequency_Coverage_Range: 13.65 GHz (Ku band)
   End_Group
   Online_Resource: http://topex.wff.nasa.gov/
   Online_Resource: http://www.jason.oceanobs.com/html/donnees/tools/poseidon_uk.html
   Sample_Image: http://sealevel.jpl.nasa.gov/gallery/spacecraft/gifs/BHT.jpg
   Creation_Date: 2007-04-16
   Group: Instrument_Logistics
      Instrument_Start_Date: 1992-09-23
      Instrument_Stop_Date: 2005-10-09
      Instrument_Owner: CNES
   End_Group
End_Group"""@en ;
  skos:prefLabel "SSALT"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/92ddaaca-40b2-4936-bc1a-28cc5743e8b8> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/92ddaaca-40b2-4936-bc1a-28cc5743e8b8>
  skos:prefLabel "Radar Altimeters"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/4c4d88f6-a2e2-4394-81ac-b2919cb2efcd> .