Nauticast GmbH NAUTICASTA2 用户手册
Page 53 of 80
1001001-2EN A2 Product Manual 2_0
8.1.4 GLL – Geographic position, latitude/longitude
$--GLL,llll.ll,a,yyyy.yy,a,hhmmss.ss,A,a
$--GLL,llll.ll,a,yyyy.yy,a,hhmmss.ss,A,a
Field
Format
Name
Comment
1
--GLL
Sentence Id
Used
2
llll.ll
Latitude
Used
3
a
4
yyyy.yy
Longitude
Used
5
a
6
hhmmss.s
s
s
UTC of position
UTC Second is used to indicate Time
Stamp
Stamp
7
A
Status
Used
8
a
Mode indicator
NULL -> Message is ignored
A -> Position with Low Accuracy
A -> Position with Low Accuracy
D -> Position with High Accuracy
E -> Dead Reckoning Mode with Low
E -> Dead Reckoning Mode with Low
Accuracy
M-> Manual Mode with Low Accuracy
M-> Manual Mode with Low Accuracy
OTHER -> No Position
8.1.5 GNS – GNSS fix data
If the Mode Indicator is a NULL field, the sentence is ignored.
$--GNS,hhmmss.ss,llll.ll,a,yyyy.yy,a,c--c,xx,x.x,x.x,x.x,x.x,x.x
If the Mode Indicator is a NULL field, the sentence is ignored.
$--GNS,hhmmss.ss,llll.ll,a,yyyy.yy,a,c--c,xx,x.x,x.x,x.x,x.x,x.x
Field
Format
Name
Comment
1
--GLL
Sentence Id
Used
2
hhmmss.s
s
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
c--c
Mode indicator
A, P -> Position with low accuracy
D, R, F -> Position with high Accuracy
E -> Dead Reckoning Mode with Low
E -> Dead Reckoning Mode with Low
accuracy
M -> Manual Mode with low accuracy
M -> Manual Mode with low accuracy
OTHER -> No Position
8
xx
Total number of satellites
Used when the GPS source is the internal
GPS (used in proprietary sentences)
9
x.x
HDOP
Ignored
10
x.x
Antenna altitude, meter
Ignored
11
x.x
Geodial separation
Ignored
12
x.x
Age of differential corrections
Ignored
13
x.x
Differential reference station ID
Ignored
8.1.6 HDT - Heading, True
The use of this sentence is talker identifier dependent.
The use of this sentence is talker identifier dependent.
$--HDT,x.x,T
Field
Format
Name
Comment
1
--HDG
Sentence Id
Used
2
x.x
Heading, degrees true
Used
3
T
NOTE: HDT input must be sent at least every 3 seconds for the NAUTICAST A2 to calculate ROT
from the HDT input.