@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/097dc475-d0f6-464c-bc41-bb14bc9e826a>
  ns0:altLabel [ ] ;
  skos:definition """The Sun and the Earth emit radio waves that affect particles in the interplanetary plasma and carry some of the energy flowing there. The Radio and Plasma Wave experiment (WAVES) on WIND will measure the properties of these waves and other wave modes of the plasma over a wide frequency range. Analyses of these measurements, in coordination with the other onboard plasma, energetic particles, and field measurements, will further the understanding of solar wind and interplanetary plasma processes.

The sensor system of the WAVES experiment consists of three electric antenna systems (two coplanar, orthogonal wire antennas in the spin-plane and a rigid spin-axis dipole) and a triaxial magnetic search coil. The longer and shorter spin plane dipoles have lengths of 50 m and 7.5 m for each wire, respectively, while each spin-axis dipole extends 5.28 m from the top and bottom surfaces of the spacecraft. The triaxial magnetic search coil for measuring bi-frequency magnetic fields is mounted at the outboard end of a 12-m radial boom.

There are five main receiver systems: a bi-frequency (DC to 10 kHz) Fast Fourier Transform receiver, a broadband (4 kHz to 256 kHz) electron thermal noise receiver, two swept-frequency radio receivers (20 kHz to lMHz, and lMHz to 14 MHz), and a time domain waveform sampler (up to 120,000 samples per second). The DPU controls and acquires data from all operations of the experiment, and can be reprogrammed from the ground. The receiver systems and DPU are housed within the spacecraft body. WAVES has onboard interconnects with 3-D PLASMA and with SWE.  

For more information, see:
http://ssed.gsfc.nasa.gov/waves/


Group: Instrument_Details
   Entry_ID: WAVES
   Group: Instrument_Identification
      Instrument_Category: Solar/Space Observing Instruments
      Instrument_Class: Radio Wave Detectors
      Short_Name: WAVES
      Long_Name: Radio and Plasma Wave Investigation
   End_Group
   Group: Associated_Platforms
      Short_Name: WIND
   End_Group
   Group: Spectral_Frequency_Information
      Wavelength_Keyword: Radio
      Number_Channels: 5
      Spectral_Frequency_Coverage_Range: 4 kHz - 14 MHz
   End_Group
   Online_Resource: http://ssed.gsfc.nasa.gov/waves/
   Group: Instrument_Logistics
      Instrument_Start_Date: 1994-11-01
      Instrument_Owner: NASA
      Instrument_Owner: Paris-Meudon Observatory
      Instrument_Owner: University of Minnesota
   End_Group
End_Group"""@en ;
  skos:prefLabel "WAVES"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/d8fc8d90-89b6-49c8-aeb7-c45afb8963d8> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/d8fc8d90-89b6-49c8-aeb7-c45afb8963d8>
  skos:prefLabel "Radio Wave Detectors"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/097dc475-d0f6-464c-bc41-bb14bc9e826a> .

