Saab R5 - Interpretation of Input Sentences; GPS and Sensor Input Sentences; DTM Datum Reference Sentence; GBS GNSS Satellite Fault Detection Sentence

R5 SOLID AIS System
INTERPRETATION OF INPUT SENTENCES
7000 118-200, C2 Page 65
8 INTERPRETATION OF INPUT SENTENCES
All interface ports accepts the full set of input listed below sentences, except the
sentences listed in section 8.4.1 that are unique to the Long Range interface port.
The protocol of the serial input sentences shall be compliant to IEC 61162-1Ed.4 (2010-
11) for maximum interoperability.
8.1 GPS and Sensor Input Sentences
8.1.1 DTM - Datum Reference
If local code is other than WGS84, then the positions report from that
port is discarded.
$--DTM,ccc,a,x.x,a,x.x,a,x.x,ccc
Field
Format
Name
Comment
1
--DTM
Sentence Id
Used
2
ccc
Local Datum Code
Interpret if it’s WGS84 or not
3
A
Local Datum Subdivision Code
Ignored
4
x.x
Lat Offset (2 fields)
Ignored
Ignored
5
a
6
x.x
Long Offset (2 fields)
Ignored
Ignored
7
a
8
x.x
Altitude Offset
Ignored
9
ccc
Reference Datum Code
Ignored
8.1.2 GBS - GNSS Satellite Fault Detection
If this sentence is received once a second from the position source in
use, the RAIM flag will be set to TRUE.
$--GBS,hhmmss.ss,x.x,x.x,x.x,xx,x.x,x.x,x.x
Field
Format
Name
Comment
1
--GBS
Sentence Id
Used
2
hhmmss.
ss
UTC Time of GGA or GNS
Ignored
3
x.x
Expected Error in latitude
Used
4
x.x
Expected Error in longitude
Used
5
x.x
Expected error in altitude
Ignored
6
xx
ID number of most likely
failed satellite
Ignored
7
x.x
Probability of missed
detection
Ignored
8
x.x
Estimate of bias in meters
Ignored
9
x.x
Standard Deviation of bias
estimate
Ignored
8.1.3 GGA - Global Positioning System Fix Data
$--GGA,hhmmss.ss,llll.ll,a,yyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx
Field
Format
Name
Comment
1
--GGA
Sentence Id
Used
2
hhmmss.
ss
UTC of position
UTC Second is used to indicate
Time Stamp
3
llll.ll
Latitude
Used
4
a
5
yyyy.yy
Longitude
Used
6
a
7
x
GPS quality indicator
Used,
1 -> Position with Low Accuracy
2 -> Position with High