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05/01/97 REV H
Table 34: Navigation status sentence
Data field
Contents
$PMCAG,900,ccc,c*hh<CR><LF>
Navigation mode.
ccc
•
•
•
•
•
•
•
GPS fix quality indicator.
c
•
•
Example J:
$PMCAG,900,3-D,H*5F<CR><LF>
Here, navigation mode is 3-D fix.
Data request list overflow ($PMCAG, 901)
This message is returned when more than eight data requests are pend-
ing:
$PMCAG,901*hh<CR><LF>
Example K:
Self-test results ($PMCAG, 902)
This message provides results of the 8700 GPS sensor self-test. The mes-
sage is automatically output in response to an initiated BIT self-test
request (see input message identifier 003 ). This message also can be
requested through input message identifier 004 to retrieve the current
status of the sensor without initiating a self-test sequence.
3DD : 3-D fix with differential aiding
3-D : 3-D fix
2DD : 2-D fix (constant altitude) with differential
aiding
2-D : 2-D fix (constant altitude)
D-R : Dead reckoning
INI : Initialized (from last good fix or external
initialization)
NCD : No computed data. Fix data isn't valid and
should be ignored. The GPS sensor doesn't have
a valid time and/or position from last good fix or
external initialization.
L : Low. Navigation solution is obtained from
fewer than five satellite measurements.
H : High. Navigation solution is obtained from at
least five satellite measurements.
$PMCAG,901*4C<CR><LF>
Section 10 - NMEA protocols
PAGE 53
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