SX BLUE GPS iSXblue II+ GNSSTM, User Manual

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SXblue Series User Manual 96
the horizon. Fortunately, the COAST Technology helps alleviate this problem by
maintaining system performance when SBAS signal loss occurs for extended
periods of time. More information on COAST is provided in Section 2.6.
When using SBAS correction data, the SXblue receiver is able to provide you with
the azimuth and elevation of the SBAS available satellites via a NMEA command
to aid in determining their position with respect to the built-in antenna. See the
Technical Reference Manual for more information on the $JGEO command.
Worldwide SBAS Coverage
Figure B-3 depicts the current world SBAS coverage. This figure is only an
approximation of signal coverage by each of the SBAS constellation. Although
there is geographic coverage at higher latitudes, practical usage of SBAS will be
limited to environments where a relatively consistent line of sight to the satellites
from the SXblue receiver is available.
Figure B-3 Worldwide SBAS Coverage
Table B-1 lists all the PRN numbers allocated to each of the SBAS Constellations.