SX BLUE GPS iSXblue II+ GNSSTM, Руководство пользователя

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SXblue Series User Manual 60
2.7.2 The L-Band Application
The SXblue Platinum standard configuration is GPS/SBAS with MFA application
installed. Atlas L-Band can be activated with subscription and then comes
automatically with Multi-GNSS, RTK and Multi-Frequency option.
2.7.3 RTK Differential options
RTK differential is an application to use and apply correction from reference
station. This application can be used between two SXblue receivers. One receiver
is used as the base station and must remain stationary. It is extremely useful to
know the coordinates of the base station position, but averaging the position will
also suffice. The second receiver is used as a rover and the messages (correction)
must be sent through a communication system. Various types of radio-modem
technology are available (UHF, 900MHz, 2.4GHz, cellular, etc.) to suit the
application.
The RTK application can perform the following:
•
Differential (DGPS) solution 20cm floating solution
•
RTK fixed solution 1-3cm with OTF (On-The-Fly) capability
For the RTK application, the baseline length (distance between base station and
rover) should be kept short (less than 10km) for fixed solution. The positioning
performance of the receiver in RTK modes is dependent upon the environment of
the base and rover receivers, the distance between them and the accuracy of the
entered coordinates of the base station. We suggest that you perform your own
testing at your location to determine the level of performance that you would expect
to see on average.
2.8 Post Processing
The SXblue receiver is able to output raw measurement data for post processing
applications. The raw measurement and ephemeris data are contained in various
binary messages documented in the Technical Reference Manual. Messages
must be logged in a binary file (SXblue Config allows logging of raw binary data).
For cm-level post-processing, a survey grade L1/L2 GNSS antenna with ground
plane is highly recommended and software that processes the carrier phase like
EZSurv should be used.
A RINEX translator is available; however, RINEX has no facility to store station
information. Please contact SXblue GPS if you wish to use this utility. Off-the-shelf
software is available for collecting and post-processing SXblue data.