Figure 89: Geographic Antenna Baseline Vector - Applanix POS MV V5 Installation And Operation Manual

POS MV computes a carrier phase differential position solution in geographic co-ordinates of Antenna 2
with respect to Antenna 1. This is the geographical antenna baseline vector:
Because the geographical antenna baseline vector is referenced to true north, it varies as the vessel
changes course. However, the heading aiding data required by POS MV is the heading of the antenna
baseline referenced to the x-axis of the IMU.
POS MV transforms the geographic antenna baseline vector Ф
using the surveyed antenna baseline vector
IMU co-ordinate frame. Figure 90 illustrates these headings and angles.
Copyright © Applanix Corporation, 2017
POS MV V5 Installation and Operation Guide

Figure 89: Geographic Antenna Baseline Vector

E
Ф
-1
= tan
ANT
N
Where: Ф = the geographical antenna baseline vector
ANT
E = the easterly component of the position
difference between Antenna 1 and Antenna 2
N = the northerly component of the position
difference between Antenna 1 and Antenna 2
to the geographic IMU heading Ф
ANT
r Δ
, which is the antenna baseline vector resolved in the
12
Theory
of Operation
IMU
B-19