More information on the algorithm can be found at http://www.x-io.co.uk/open-source-imu-and-ahrs-algorithms/.
This implementation was done at the Cognitive Systems Lab (CSL) of the Karlsruhe Institute of Technology: http://csl.anthropomatik.kit.edu/
Copyright (c) 2015-2022 Jonas Böer, webmaster@morgil.de
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this program. If not, see http://www.gnu.org/licenses/.