Data Sheet

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Dat
a Sheet
GlobalTop Technology
Ver. V0
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Document #
GSA—GNSS DOP and Active Satellites
Table-4 contains the values for the following example：
$GPGSA,A,3,29,21,26,15,18,09,06,10,,,,,2.32,0.95,2.11*00
Table
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4: GSA Data Format
Name
Example
Units
Description
Message ID $GPGSA GSA protocol header
Mode 1 A See
Table
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5
Mode 2 3 See
Table
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6
Satellite Used 29 SV on Channel 1
Satellite Used 21 SV on Channel 2
....
…. ….
....
Satellite Used SV on Channel 12
PDOP 2.32 Position Dilution of Precision
HDOP 0.95 Horizontal Dilution of Precision
VDOP 2.11 Vertical Dilution of Precision
Checksum *00
<CR> <LF> End of message termination
Table
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5: Mode 1
Value
Description
M Manual—forced to operate in 2D or 3D mode
A 2D Automatic—allowed to automatically switch 2D/3D
Table
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6: Mode 2
Value
Description
1 Fix not available
2
2D (＜4 SVs used)
3 3D ( 4 SVs used)≧