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Paul Riseborough
3accab1ac5
Fusion with large initial magnetometer biases errors can result in the the NE earth field states reducing in magnitude and effectively flipping sign. EKF: Move declination state limiting into a separate function EKF: Limit NE mag states after each 3-axis mag fusion EKF: Fix bug in mag field strength look-up scale factor
52 lines
2.2 KiB
C
52 lines
2.2 KiB
C
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* Copyright (c) 2014 MAV GEO Library (MAVGEO). All rights reserved.
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/**
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* @file geo_mag_declination.h
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*
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* Calculation / lookup table for Earth's magnetic field declination, inclination and strength.
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* Data generated by https://www.ngdc.noaa.gov/geomag-web/#igrfgrid IGRF calculator on 22 Jan 2018
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*
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*/
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#pragma once
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// Return magnetic declination in degrees
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float get_mag_declination(float lat, float lon);
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// Return magnetic field inclination in degrees
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float get_mag_inclination(float lat, float lon);
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// return magnetic field strength in centi-Tesla
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float get_mag_strength(float lat, float lon);
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