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3.5
3.5.1
Description
ARP
Vertical phase centre
variations
☞
3.5.2
Description
26
Connecting the wrong antenna to the wrong connector may dam-
☞
age the antennas. In order to minimise the chance of connecting
the incorrect external antenna, the four TNC connectors are colour
coded. Cables with corresponding colours are available.
The colour coding is as follows:
a
0020463_002
Antenna Heights
Understanding Antenna Heights
The height of the GNSS antenna above a point consists of three components:
the vertical or slope height reading,
•
the vertical offset,
•
the vertical phase centre offset.
•
For most operations, pre-configured standard settings in the instrument
can be used. They automatically take the vertical phase centre offsets into
account.
The antenna accepts vertical height readings to the Antenna Reference Plane,
ARP.
These are handled automatically in the standard antenna records. The antenna
calibrations to determine the phase centre variations were executed by Geo++
GmbH.
Mast setup. The dimensions of the mast must be determined.
The Antenna Reference Plane, ARP
The Antenna Reference Plane:
Is where the instrument heights are measured to.
•
Is where the phase centre variations refer to.
•
Varies for different instruments.
•
b
c
d
a
b
c
d
e
f
g
e
f
g
Brown: Bluetooth
Purple: WiFi
Yellow: Modem 1
Green: Modem 2
White: Radio
Blue: GNSS Antenna 1
Red: GNSS Antenna 2
Using iCON aps 200
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