FLIGHT MANUAL STEMME S12
PAGE: 7-6
DOCUMENT NUMBER
REVISION: --
L400-912816 ISSUEFEBRUARY 21 2020
DATE: --- --, -----
7.1.3
Dependency of AHRS data
The Attitude and Heading Reference System (AHRS) performs attitude,
heading, and vertical acceleration calculations for the G3X Touch System,
utilizing GPS, magnetometer, and air data in addition to information from
its internal sensors. Attitude and heading information are updated on the
PFD while the AHRS receives appropriate combinations of information from
the external sensor inputs.
The AHRS (GSU 25) corrects for shifts and variations in the Earth’s magnetic
field by applying the Magnetic Field Variation Database. The Magnetic
Field Variation Database is derived from the International Geomagnetic
Reference Field (IGRF). The IGRF is a mathematical model that describes
the Earth’s main magnetic field and its annual rate of change. The
database is updated approximately every 5 years via a GDU software
update. Failure to update this database could lead to erroneous heading
information being displayed to the pilot.
Summary of Contents for G3X Touch
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