Table 33: Primary-Port Output Sentences - NorthStar 8700 Technical Reference Manual

Section 10 - NMEA protocols
10.2.2 Output
sentences
Message Name
identifier
Navigation status
900
Data request list overflow
901
Self-test results
902
Radio-beacon proprietary info
903
GPS fix data
GGA
Geographic position—latitude/longitude
GLL
GPS DOP and active satellites
GSA
GPS satellites in view
GSV
MSS radio-beacon receiver signal status
MSS
Recommended minimum specific GPS data
RMC
Track made good and ground speed
VTG
UTC time and date and local time zone
ZDA
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Data field Contents
Beacon bit rate (25, 50, 100, 200) bits/sec
x.x
Auto/manual bit rate
a
Interval for sending $PCMCAG, 903 , and MSS mes-
x.x
sage in seconds. (When status data won't be trans-
mitted, this field is "null." If not null, the MSS and
$PCMCAG, 903 sentences are sent at the specified
rate.)
Example I:
$GPMSK,288.0,A,100,A,004*6b<CR><LF>
Here, MSS and 903 are transmitted every four seconds; set the frequency
to 288.0 in automatic mode, and bitrate to 100 in automatic mode.
This section defines the valid output sentences available on the primary
port. Table 33 contains all the valid output-sentence types for the GPS
receivers, and each section that follows provides detailed descriptions of
these sentences.

Table 33: Primary-port output sentences

Navigation status ($PMCAG, 900)
This message provides the current navigation mode and GPS fix quality
indicator.
Maximum sentence
length (characters)
21
15
39
40
82
51
66
3*70
29
69
37
39
Rate
Adjustable
N/A
On request
Adjustable
(via MSK)
Adjustable
Adjustable
Adjustable
Adjustable
Adjustable
(via MSK)
Adjustable
Adjustable
Adjustable
05/01/97 REV H