SEPTENTRIO PolaRx5TR, Reference Manual

Page: 398 / 512

4 SBF Reference
PosCart
Number: 4044
"OnChange"
interval: default PVT output rate (see 4.1.8)
This block contains the absolute and relative (relative to the nearest base station) position
at the time specified in the
TOW
and
WNc
fields. The time of applicability is specified in the
receiver time frame.
The absolute position (
X
,
Y
,
Z
) is reported in a Cartesian coordinate system using the
datum indicated in the
Datum
field. The position is that of the marker. The ARP-to-marker
offset is set through the command
setAntennaOffset
.
For highest accuracy, the receiver tries to compute the baseline (
Base2RoverX
,
Base2RoverY
,
Base2RoverZ
) from rover ARP to base ARP. See the description of
the
BaseVectorCart
block for details.
Accurate ARP-to-ARP baseline is guaranteed only if both bits 0 and 1 of the
Misc
field
are set. Otherwise, centimeter-level offsets may arise because the receiver cannot make the
distinction between phase center and ARP positions. See section 2.5 for a discussion on the
phase center and ARP positions.
This block also contains the variance-covariance information and DOP factors associ-
ated with the position.
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