NEO-D9S - Integration manual
2 System description
2.1 Overview
NEO-D9S is a satellite data receiver for L-band correction broadcast, which can be configured for use
with a variety of correction services. It decodes the satellite transmission and outputs a correction
stream, enabling a high precision GNSS receiver to reach accuracies down to centimeter level.
2.1.1 Satellite L-band DGNSS
Wide area correction services from several service providers are available via the L-band
communication satellites. These satellites cover the bulk of the globe's populated surface. However
each DGNSS service provider using the L-band channel will possibly have spot beams only covering
the relevant area their corrections are valid for. This ensures their correction coverage area is
accessible via a satellite and not simply broadcast over large areas of the earth with no feasible use.
Each service provider will be allocated a correction service ID and a frequency for a particular part of
the globe. In addition the service provider will have a data bit rate for their data stream.
This means that the frequency allocation for a particular service provider could change. It is
important that any deployed system can be re-configured if necessary. Service providers do provide
information on any frequency changes when required.
2.2 Architecture
The NEO-D9S receiver provides all the necessary RF and baseband processing to enable multi-band,
multi-constellation operation. The block diagram below shows the key functionality.
2.2.1 Block diagram
Figure 1: NEO-D9S block diagram
An active antenna is mandatory with the NEO-D9S.
UBX-19026111 - R07
2 System description
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