Chapter I: A brief introduction of S9 III
5
interference and makes the volume much smaller. The tight electronic shielding can avoid the
interference more effectively.
The S9III receiver mounts a GPS/GLONASS antenna with a four feed technology. This design is
able to reduce the electrical phase center error ellipsoid and in addiction it improves the Right
Hand Circular Polarization Characteristics (RHCP) of the antenna, resulting in enhanced GPS
signal tracking and improved multipath rejection, in case a polarization reversal has taken
place as a result of the signal reflection.
At the same time S9III has a GPRS/GSM module which supports different network RTK
technologies (VRS, FKP, etc.). This allows STONEX
®
S9III receiver to be a flexible system for
demanding surveying applications. As a rover, it can be used as a static double frequency
receiver or in a RTK configuration, where differential corrections are received from CORS via
GSM/GPRS data modem (maximum range 70 km) or by another S9III receiver acting as base,
linked by GSM/GPRS data modem or UHF radio modem.
In the last case S9III in base configuration can transmit with the built-in 0.5 W radio or can be
connected to a more powerful external radio at user's disposal in order to reach the requested
metric range.
The receiver can be connected to different RTK software for different applications. The data
transfer is easy and fast, like a Plug and Play USB drive.
STONEX
®
provides two year of warranty to S9III receivers . It should be noted that high power
signals from a nearby radio or radar transmitter can overwhelm the receiver circuits. Low
power transmitter like those used in cell-phones do not normally interfere with receiver’s
operations. It’s important to draw your attention to the operational temperatures, limits which
should not be exceeded for a correct functioning (see pag. 55).
It is also important to point out that in each weather case after coming back from the field
you should keep the container open in a warm and dry place and
at the same time take out the
controller and receiver from the container, in order to make them dry.
Anyway we recommend you to manage the instrument with reasonable care.
Even if you have used other GPS or GNSS products before, we recommend that you spend some
time reading this manual to learn about the special features of this product.
