User's Manual Part 1

Positioning Modes of Operation Chapter 5
OEMV Family Installation and Operation User Manual Rev 5B 87
Figure 28 on Page 87 is a conservative map of the coverage areas that CDGPS guarantee. The
coverage may be better in your area.
Figure 28: CDGPS Percentage (%) Coverage Map
In Figure 28, 100% coverage means that a correction is received for every visible satellite (at or above
10 degrees). 90% coverage means that a correction is received for 90% of visible satellites. For
example, if a user views 10 satellites but has 90% coverage then there are no corrections available for
one of the satellites. In that case, our firmware shows that a correction is missing for that PRN and
excludes it from the position calculation.
1. If the coordinates are output using the CSRS datum, refer to the DATUM command.
2. The Geological Survey of Canada website is at http://gsc.nrcan.gc.ca/index_e.php
.