Left-Side View; Phase Center Location - Spectra SP80 User Manual

Left-Side View

Phase Center
Location
8
[17]
[16]
• [16]: Rubber flap protecting the USB connector. To
preserve watertightness,
when you don't need to use the USB port.
• [17]: USB connector emulating standard RS232 serial
port (port B). For use in troubleshooting only.
See diagram below. These are relative measurements.
The field software usually calculates the real height of the
instrument, based on the location of the L1 phase center.
Whether you provide a vertical or slant measurement of the
antenna base (ARP), the field software you are using should
be able to deduce the real height of the instrument, using the
pre-loaded dimensional parameters (antenna radius, etc.)
specific to the model of GNSS antenna used.
In the case of a slant measurement, the software will also use
the radius of the antenna to determine the instrument height.
ALWAYS KEEP FULLY CLOSE
L1 84.6 mm
L2 77.6 mm