Navigation Status - NorthStar 2505 Installation Manual

Navigation status

2505 INSTALLATION MANUAL, Revision A
This message provides the current navigation mode and GPS
fix quality indicator.
HEADER CONTENTS OF DATA FIELDS
$PMCAG,900,ccc,c*hh<CR><LF>
1. Navigation mode:
3DD 3-D fix with differential aiding
3-D 3-D fix
2-DD 2-D fix (constant altitude) with differential aiding
2-D 2-D fix (constant altitude)
D-R dead-reckoning
INI initialization (from last good fix or external
initialization
NCD no compound data; fix data is not valid and
should be ignored
The GPS sensor doesn't have a valid time and/or a valid
position (from last good fix or external initialization).
2. GPS fix quality indicator:
L = Low (Navigation solution is obtained from fewer than
5 satellite measurements.)
H = High (Navigation solution is obtained from at least 5
satellite measurements.)
Example:
$PMCAG,900,3-D,H*5F<CR><LF>
Navigation mode:
3-D fix (GPS fix obtained from at least 5 satellites).
Appendix C NMEA output protocol
2
GPS fix quality indicator
1
navigation mode
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