S A N J O S E N A V I G A T I O N , I N C .
P r o f e s s i o n a l i n N a v i g a t i o n & C o m m u n i c a t i o n
S
S
A
A
N
N
J
J
O
O
S
S
E
E
N
N
A
A
V
V
I
I
G
G
A
A
T
T
I
I
O
O
N
N
,
,
I
I
N
N
C
C
.
.
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TAIPEI HSIEN, TAIWAN, R.O.C.
TEL: 886-2-26879500
FAX: 886-2-26878893
WWW.SANAV.COM
23
ISO 9001
NO. T2000-351
8.2 $GPGSA (out) – Positioning status
Example
$GPGSA ,A ,3 ,01 ,02 ,03 …… ,02.00 ,03.00 ,04.00 *hh CR
LF
Field# 1
2
3 4 5
6……
15 16 17 18
#. Description
Range
[Bytes]
1. Operational Mode
M or A
[1]
“M”: 2D-only Mode
“A”: 2D/3D Auto-switching Mode
2. Mode
1-3
[1]
“1”: Fix not available
“2”: 2D-positioning
“3”: 3D-positioning
3-14. Satellite Numbers used for positioning
01-32
[2] or [0]
Note:
A null field is output unless a satellite is available.
15. PDOP
n/a
[5]
Note:
“00.00” is output unless 3D-positioning is performed.
16. HDOP
n/a
[5]
Note:
“00.00” is output while positioning is interrupted.
17. VDOP
n/a
[5]
Note:
“00.00” is output unless 3D-positioning is performed.
18. Checksum
[2]
Interpreting Example
2D/3D Auto-switching Mode
3D-Positioning
Satellites used: 01,02,03…
PDOP: 2.00
HDOP: 3.00
VDOP: 4.00
