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

<https://gcmd.earthdata.nasa.gov/kms/concept/deac2632-5c17-4d15-ae92-c61ebc5a405a>
  skos:prefLabel "MAGNETOMETERS"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/c820f9c5-af80-4fbc-aab8-2cd92739135b> .

<https://gcmd.earthdata.nasa.gov/kms/concept/c820f9c5-af80-4fbc-aab8-2cd92739135b>
  skos:definition """The HPM is an optically-pumped absolute scalar magnetometer which is based on two-photon spectroscopy of free alkali atoms. In a special laser based excitation mode, three different magnetic field dependent resonances arise in the presence of an external magnetic field. They reach their maximal strengths at different angles between the magnetic field direction and the reference axis of the sensor which is defined by the optical path of the laser excitation field. Dependent on this angle, the strongest resonance is selected for the actual measurement which enables an omnidirectional scalar magnetometer.

Main parameters:

- Frequency Range: DC-15 Hz

- Resolution: 0.15 nT

- Sensitivity: 0.05 nT·Hz- 1/2 @ 1 Hz"""@en ;
  skos:changeNote """2021-08-06 08:53:43.0 [mmorahan]  
update Definition (https://directory.eoportal.org/web/eoportal/satellite-missions/content/-/article/cses-zhangheng-1); 
""", """2021-08-06 08:31:59.0 [mmorahan]  
insert AltLabel (id: null
category: primary
text: High-Precision Magnetometer
language code: en); 
insert Definition (id: null
text: The HPM is an optically-pumped absolute scalar magnetometer which is based on two-photon spectroscopy of free alkali atoms. In a special laser based excitation mode, three different magnetic field dependent resonances arise in the presence of an external magnetic field. They reach their maximal strengths at different angles between the magnetic field direction and the reference axis of the sensor which is defined by the optical path of the laser excitation field. Dependent on this angle, the strongest resonance is selected for the actual measurement which enables an omnidirectional scalar magnetometer.

Main parameters:

- Frequency Range: DC-15 Hz

- Resolution: 0.15 nT

- Sensitivity: 0.05 nT·Hz- 1/2 @ 1 Hz
language code: en); 
insert WeightedRelation (id: null
related concept uuid: 52ae802c-b2fd-4548-aefd-ec4e4325b803
relationship type: null
relationship value: null
generated by: null); 
""", """2021-08-06 08:22:43.0 [mmorahan] Insert Concept 
add broader relation (Zhangheng HPM [c820f9c5-af80-4fbc-aab8-2cd92739135b,692297] - MAGNETOMETERS [deac2632-5c17-4d15-ae92-c61ebc5a405a,685002]); 
""" ;
  skos:prefLabel "Zhangheng HPM"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  ns0:reference [ ] ;
  a skos:Concept ;
  ns0:altLabel [ ] ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/deac2632-5c17-4d15-ae92-c61ebc5a405a> .