Topcon HiPer Plus, Руководство оператора, Страница: 93 / 184

HiPer+ Receiver Setup
1-866-4TOPCON www.topconpositioning.com
3-3
4. Measure the antenna height above the point or marker.
Figure 3-1 illustrates the antenna offsets and Table 3-1
gives the offset measurements. (See Figure 1-3 on
page 1-15 and Figure 1-4 on page 1-16 for the exact
SHMM location.)
Figure 3-1. HiPer+ Antenna Offsets
• SHMM to ARP vertical offset = 30.50mm
• SHMM to ARP horizontal offset = 77.75mm
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
Table 3-1. HiPer+ Antenna Offset Measurements
To L1 Phase Center To L2 Phase Center
Up 102mm 94mm
SHMM
ARP
30.50mm
77.75mm