SV-ADAHRS-200 Module Installation and Configuration
SkyView HDX System Installation Manual - Revision E 7-7
North, East, South, and West, such as an airport’s compass rose, is required. During the
compass calibration, the aircraft’s configuration and major systems should be in a state
that resembles flight conditions (i.e., the canopy should be closed, the aircraft’s pitch
attitude matches SkyView’s attitude depiction, the engine should be running, and all
electronic devices used in flight should be on).
Tail wheel equipped aircraft can be calibrated in their normal nose up ground
attitude as long as the SkyView attitude display shows the correct
corresponding nose up attitude.
A working GPS receiver with a view of the sky to acquire GPS data must be
connected to the SkyView system in order to perform a compass calibration.
SkyView uses GPS-derived position information to calculate magnetic
intensity, declination, and variation.
During the on-ground compass calibration it is important to perform the
compass calibration in an area that has been verified to be magnetically
neutral. The presence of steel reinforcement (rebar), electrical power lines
under the tarmac, or other natural deposits of ferrous metals can result in an
inaccurate compass calibration. Airport compass roses are usually verified to
be magnetically neutral and thus are often a good location for performing a
compass calibration.
For more information on this issue see FAA Notice Number: NOTC4031:
https://www.faasafety.gov/files/notices/2012/Aug/CAUTION_TLP_031612_R
ev10.pdf
7.3.1 On-ground Compass Calibration Procedure:
1. Turn on the SkyView system and allow it to warm up for a minimum of 5 minutes.
2. Move the aircraft into position so that it is convenient to orient it in the four (4)
cardinal directions.
3. Enter the Setup Menu on the SkyView display and go to the Compass Calibration
Wizard (SETUP MENU > HARDWARE CALIBRATION > ADAHRS CALIBRATION
> COMPASS CALIBRATION). Note - GPS data on the Compass Calibration Page
must be green. If it is red, GPS data is not valid.
4. Orient the aircraft to North, South, East, or West.
5. When the aircraft is stable at the chosen orientation, push the button indicating the
direction the aircraft is oriented in. Example – when the aircraft is pointed North,
push the NORTH button.
6. Wait for data collection to reach 100%.
7. Rotate to the next cardinal direction and repeat steps 4, 5, and 6 for any remaining
headings.
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