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Remote sensing of geomagnetic fields and atomic collisions in the mesosphere.

ABSTRACT: Magnetic-field sensing has contributed to the formulation of the plate-tectonics theory, mapping of underground structures on Earth, and the study of magnetism of other planets. Filling the gap between space-based and near-Earth observations, we demonstrate a remote measurement of the geomagnetic field at an altitude of 85-100?km. The method consists of optical pumping of atomic sodium in the mesosphere with an intensity-modulated laser beam, and ground-based observation of the resultant magneto-optical resonance near the Larmor precession frequency. Here we validate this technique and measure the Larmor precession frequency of sodium and the corresponding magnetic field with an accuracy level of 0.28?mG?Hz^-1/2. These observations allow the characterization of atomic-collision processes in the mesosphere. Remote detection of mesospheric magnetic fields has potential applications such as mapping magnetic structures in the lithosphere, monitoring space weather, and electric currents in the ionosphere.

SUBMITTER: Pedreros Bustos F

PROVIDER: S-EPMC6162266 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Remote sensing of geomagnetic fields and atomic collisions in the mesosphere.

Pedreros Bustos Felipe F Bonaccini Calia Domenico D Budker Dmitry D Centrone Mauro M Hellemeier Joschua J Hickson Paul P Holzlöhner Ronald R Rochester Simon S

Nature communications 20180928 1

Magnetic-field sensing has contributed to the formulation of the plate-tectonics theory, mapping of underground structures on Earth, and the study of magnetism of other planets. Filling the gap between space-based and near-Earth observations, we demonstrate a remote measurement of the geomagnetic field at an altitude of 85-100 km. The method consists of optical pumping of atomic sodium in the mesosphere with an intensity-modulated laser beam, and ground-based observation of the resultant magneto ...[more]

PMID: 30266926

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Dataset Information

Remote sensing of geomagnetic fields and atomic collisions in the mesosphere.

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Remote sensing of geomagnetic fields and atomic collisions in the mesosphere.

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