System and method for heading error correction in a pulsed Rb-87 magnetometer at geomagnetic fields
US12174020B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | May 28, 2021 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Jul 30, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to various embodiments, a method for reducing heading error in a magnetometer that uses Rb-87 atoms is disclosed. The method includes varying a direction and magnitude of a magnetic field at different spin polarization regimes. According to various embodiments, a magnetometer adapted for reduced heading error is disclosed. The magnetometer includes a multipass cell containing Rb-87 vapor, a pump laser operated in a pulse mode that is synchronous with a Larmor frequency, and two orthogonal probe lasers configured to rotate to vary a direction and magnitude of a magnetic field at different spin polarization regimes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.