RT User Manual
Revision: 190902
61
Networked DGPS (WLAN)
The
Networked DGPS (WLAN)
controls allow an RT to be configured to broadcast or
receive differential corrections over WiFi when connected to an RT-XLAN. When
Network correction transmitter
is selected, an RT will broadcast differential
corrections it is receiving via a radio modem from an OxTS base station, using its RT-
XLAN. Other RT devices that are on the network as the broadcasting RT, will then be
able to receive the DGPS messages and use them. To do this, the
Network correction
receiver
option should be selected on those devices, and the IP address of the system
carrying the radio modem should be selected from the box. Using this system reduces
complexity in situations where multiple RTs need DGPS corrections as only one pair of
radio modems needs to be used.
Networked DGPS (WLAN) can also use corrections received via NTRIP, rather than a
local base station. As before, the RT that is connected to the NTRIP server should be
configured with Network correction transmitter selected. Other RTs should be configured
with Network correction receiver selected, and the IP address of the system that is
configured as the transmitter should be selected in the box.
Regardless of whether DGPS corrections are received via NTRIP or a local base station,
only RTCMv3 corrections are currently supported in networked DGPS mode.
SBAS
In Europe, North America, and Japan SBAS can be used for differential corrections.
These services will improve the position accuracy of the RT. In North America the SBAS
service is known as WAAS, in Europe it is known as EGNOS and in Japan it is known as
MSAS. Select the option that is most suitable for the territory you are in.
TerraStar corrections
TerraStar corrections are configured on the GNSS Differential Corrections tab within the
Hardware Setup section. You can choose between Manual or Automatic Satellite
Selection and if you choose Manual you can select from a list of available options. Using
the “Advanced Settings” checkbox you can also change the frequency and baud rate.
