Table 2 – Instruments and Sensors
(*GPS only used when airspeed from pitot and static is not available)
(** SV-ADAHRS-20X Magnetometer deactivated when SV-MAG-236 is installed)
Attitude Calculation
The SkyView artificial horizon display (attitude) is generated via a complex algorithm using a
multitude of sensors as described in Table 2. In normal operation SkyView uses airspeed to
provide superior attitude accuracy. Should airspeed become unavailable due to inadvertent
blockage of the pitot system, GPS ground speed will be used as an attitude aid. GPS ASSIST will
be annunciated on the PFD when this mode is in effect.
Compass Accuracy Effects on Synthetic Vision, Map Performance, and Autopilot
It is critical that the magnetic heading be as accurate as possible for optimal Synthetic Vision
and Moving Map performance. The SV-ADAHRS-20X – and SV-MAG-236 if included in the
system – must be installed correctly, calibrated, and operating well in all attitudes. However, it
is important to note that magnetic heading is not used to aid attitude determination under any
circumstance.
GPS Receivers – SV-GPS-250 and SV-GPS-2020
The SV-GPS-250 and SV-GPS-2020 GPS modules are externally mounted GPS receivers designed
specifically for use with SkyView systems. Both modules are powered by the SkyView HDX
display (and thus will provide position updates when the SkyView HDX display is operating on
battery backup power). Each module outputs GPS data to SkyView in NMEA format and
automatically sets the time on the SkyView HDX display.
To improve positional accuracy, both the SV-GPS-250 and the SV-GPS-2020 receive
Wide Area Augmentation System (WAAS) GPS correction signals (where WAAS is
available). The ability to receive WAAS GPS correction signals does not allow the SV-
GPS-250 or SV-GPS-2020 to be used as a primary navigation source in an IFR
environment where a TSO’d WAAS GPS may be required.
The SV-GPS-2020 became available in early 2016 and provides position updates 4x/second. In
the US, the SV-GPS-2020 GPS receiver is qualified to serve as the required GPS position source
for purposes of meeting the FAA 2020 ADS-B Out mandate. It must be installed in a SkyView
system together with the SV-XPNDR-261 Class 1 Mode-S transponder (see below for more
information) for full ADS-B Out compliance.
To Next Page
Loading...
