Et-312 – USGlobalsat ET-312 User Manual
Page 11
ET-312
The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology.
Page 11 of 21
Version 1.4
Table B-4 GLL Data Format
Name
Example
Units
Description
Message ID
$GPGLL
GLL protocol header
Latitude 3723.2475
ddmm.mmmm
N/S Indicator n
N=north or S=south
Longitude
12158.3416
dddmm.mmmm
E/W Indicator W
E=east
or
W=west
UTC Position
161229.487
hhmmss.sss
Status
A
A=data valid or V=data not valid
Checksum *2C
<CR><LF>
End
of
message termination
GSA-GNSS DOP and Active Satellites
Table B-5 contains the values for the following example:
$GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.8,1.0,1.5*33
Table B-5 GSA Data Format
Name Example
Units Description
Message ID
$GPGSA
GSA protocol header
Mode1 A
See
Table
B-6
Mode2 3
See
Table
B-7
Satellite Used
1
07
Sv on Channel 1
Satellite Used
1
02
Sv on Channel 2
…..
Satellite Used
1
Sv on Channel 12
PDOP
1.8
Position dilution of Precision
HDOP
1.0
Horizontal dilution of Precision
VDOP
1.5
Vertical dilution of Precision
Checksum *33
<CR><LF>
End of message termination
1.
Satellite used in solution.
Table B-6 Mode1
Value
Description
M
Manual-forced to operate in 2D or 3D mode
A
2Dautomatic-allowed to automatically switch 2D/3D
Table B-7 Mode 2
Value
Description
1 Fix
Not
Available
2 2D
3 3D
GSV-GNSS Satellites in View
Table B-8 contains the values for the following example: