Stonex S990A GNSS Receiver – User Manual v1.0
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Introduction
This document is the user guide for S990A and it is intended to introduce how
to use the receiver correctly.
S990A GNSS receiver is a multiple-frequency receiver and designed for GNSS
surveying applications. It is available as a base station, or as a standalone rover,
which can be switched freely whenever and wherever, offering maximum
versatility in the system configuration to meet your specific requirements. At
the same time, S990A receiver can upgrade easily to continually meet your
new demand.
The integrated design of the receiver makes the S990A only 1.40 kg, which is
light and portable. The internal antenna supports the all satellite system
signals like GPS, GLONASS, Galileo, Beidou, QZSS. The users no longer have to
worry about upgrading RTK hardware to support other satellite systems.
The internal use of the latest Sensor Fusion system allows the field to take the
tilt measurement without calibration, and the field surveying is more
convenient.
An important feature inside S990A is
Atlas
reception: Atlas is a differential
corrections systems broadcasted on L-Band, allowing increase in position
accuracy in area not covered by conventional CORS working under Ntrip
Technology (lack of reference stations, lack of GPRS signals, etc). Atlas is
broadcasted by satellite systems, so the reception is nearly ensured all over
the world. Atlas uses similar technology compared to SBAS, but providing
better positioning accuracy.
The new S990A has the new GSM modem. Worldwide LTE, UMTS/HSPA+ and
GSM/GPRS/EDGE coverage Multi-constellation GNSS receiver available for
applications requiring fast and accurate fixes in any environment. EG25-G is
backward-compatible with existing EDGE and GSM/GPRS networks, ensuring
that it can be connected even in remote areas devoid of 4G or 3G coverage.
The Stonex S990A has the new TRM 121 Radio module that support radio
trasmission on 2 different band frequencies. It can work with 410/470 Mhz
frequency and also with 900 Mhz hopping frequencies. The device supports
the most used radio protocols such as Trimtalk 450(S), Satel, PCC-EOT and
more others.
