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... > Instruments > Earth Remote Sensing Instruments > Passive Remote Sensing > Magnetic Field/Electric Field Instruments > MAGNETOMETERS > Zhangheng HPM

Preferred term

Zhangheng HPM  

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)

Broader concept

Change note

  • 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]);
  • 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 08:53:43.0 [mmorahan] update Definition (https://directory.eoportal.org/web/eoportal/satellite-missions/content/-/article/cses-zhangheng-1);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/c820f9c5-af80-4fbc-aab8-2cd92739135b

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