S800A GNSS Receiver – User Manual 16
3.1.3 Design Principles of GPS Control Network
（1）In order to ensure the continuous tracking observation of satellites and
quality of satellite signal, set up the GPS measuring station in locations which
are free of obstructions, where the altitude angle of obstacles should be less
than 15° in the field of view.
（2）In order to reduce or avoid interruption from electromagnetic wave to
satellite signal, set up the measuring station away from high-power radio
source (such as television station, broadcasting station and microwave
station). And there should be no object nearby that can strongly reflect
satellite signal (such as large-scale buildings).
（3）Measuring station should have convenient transportation and stable
ground foundation, easy for state holding and beneficial for extension of
other measuring method and joint measurement.
3.1.4 Data acquisition method
There are 2 acquisition methods of data: manual start and automatic start.
Open the Cube-a software on the handheld, click “Device” –
“Communication”, choose the receiver model and the communication mode.
There are Bluetooth and WIFI two communication modes.
a. Manual start
Click “Device” - “Working mode”, choose “Static”. At here, you can configure
static parameters, antenna parameters and satellite system.
b. Automatic start
Click “Device” - “Working mode”, choose “Static”. At parameter settings,
choose auto record static data and at the next time when the receiver is
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