There are two ways to obtain heading information from the iLevil, depending on the navigation
App of choice, you may choose between the following:
- True Track: Heading information based on GPS track.
- Magnetic Heading: Heading information determined by a combination of 3-axis
magnetometer and gyros that form part of the internal AHRS.
When using Magnetic Heading, it is important to know the following:
• Magnetic fields caused by other Magnetic Compass etc, may affect the AHRS heading.
• Verify your magnetic heading after following alignment and installation procedures:
(use AHRS Utility App -> options -> Heading -> Use magnetic)
• In case of magnetic deviation, the internal AHRS will slowly learn your aircraft configuration
during flight to compensate. This learning process requires the aircraft to turn both clockwise and
counter clockwise for at least 40 seconds.
• After turning, or at the end of your flight, verify the magnetic heading again using the AHRS
Utility App. If the AHRS was able to successfully compensate for errors, you may store this
data inside the iLevil and it will use this new configuration on the next power cycle:
(AHRS Utility -> Device Config -> Enable Configuration -> Save Mag Data).
• If AHRS was unable to compensate for errors after turns, try using a different location.
• ERASE Magnetic data using AHRS Utility before attempting a different location or moving
iLevil to a different aircraft or environment.
Magnetic Heading
