![Advanced Navigation Boreas D90 Скачать руководство пользователя страница 76](http://html.mh-extra.com/html/advanced-navigation/boreas-d90/boreas-d90_reference-manual_2856109076.webp)
Figure 44: Boreas Web UI Reference Point Offsets Dialogue
9.1.3.9 Manual Initialisation
This page can be used to manually initialise Boreas when a GNSS fix is not available. Setting the position will
initialise the navigation filter. Setting the heading will also initialise the heading filter.
Figure 45: Boreas Web UI Manual Initialisation Page
9.1.3.10 Dual Antenna
The Dual Antenna configuration page is only used if the primary and secondary GNSS antennas are not
installed in their recommended and default positions of primary front and secondary rear, at the same height.
If it is not practical to mount the antennas in the recommended alignment, the alternate alignments must be
entered into this page. It is recommended to try and use one of the automatic offsets where possible, where the
antennas must be installed in one of four different automatic offset orientations aligned on an axis.
If it is not possible to use one of the automatic offsets, the antennas can be installed in any configuration and a
manual offset should be entered. The manual offset is measured from the central base of the secondary
antenna to the central base of the primary antenna in the body co-ordinate frame (X+ forward, Z+ down). If
using a manual offset, be careful to measure the offset accurately, as even small offset errors can result in
relatively large heading errors e.g. 2 cm error = 1.15 degrees heading error with a 1 metre separation.
v1.2
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11 Oct 2022
Boreas Reference Manual • Configuring and Monitoring Boreas