Javad Maxor User Manual page 73

Figure 3-1 illustrates the antenna offsets. (See Figure 1-3 on page 1-12 and
Figure 1-4 on page 1-12 for the exact SHMM location.)
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Table 3-1 gives the offset values for the receivers.
The actual point to which surveying with GPS/GLONASS measures is called
the Phase Center of the antenna. This is analogous to the point at which a
distance meter measures in a prism. A user must enter the prism offset to
compensate for this point not being at a physical surface of the prism. In the
case of a GPS/GLONASS antenna, the offset is entered depending on the type
of measurement taken. For vertical, the offset is simply added to the measured
vertical height to produce a "true" vertical height. For slant height, the vertical
height must first be calculated using the radius of the antenna, then the offset
can be added. The offsets are not the same number because of the difference in
location between the slant measuring point and the vertical measuring point.
2.
3.
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Figure 3-1. Maxor GD and Maxor GGD Antenna Offsets
SHMM to ARP vertical offset = 30.5 mm
SHMM to ARP horizontal offset = 79.5 mm
North
East
Up
Record the antenna height, point name, and start time in the field notes.
Press the power key and release it to turn the receiver on. The STAT (status)
light (LED) will blink red at first.
79.5mm
Table 3-1. Antenna Offset Values
To L1 Phase Center
-1.7 mm
-0.8 mm
106.0 mm
S E T U P A N D S U R V E Y
Maxor Receiver Setup
To L2 Phase Center
-1.2 mm
-0.8 mm
101.2 mm
Maxor User's Manual 3-3