Specifications

101
GSA Sentences
This outputs GPS DOP and active satellite data.
Example of output:
$GPGSA,A,3,13,17,28,04,02,23,,,,,,,2.38,1.54,1.82*09
Table 2.73
Item Description Validity
$GPGSA Yes
A Positioning mode
A = 2D/3D auto-select
M = 2D/3D manual-select
Ye s
3 Positioning status
1＝no signal
2＝2D
3＝3D
Ye s
13,17,28,04,02,23,
, , , , , ,
Satellites from which signal is being transmitted.
Displays up to 12 satellites.
Ye s
2.38 Shows PDOP. The PDOP is the coefficient of position dilution
determined by the position of the GPS satellite/s. The smaller this
value becomes, the more accurate the position.
Ye s
1.54 Shows HDOP. The HDOP is the GPS coefficient of horizontal
dilution. The smaller this value becomes, the more accurate the
position.
Ye s
1.82 Shows VDOP. The VDOP is the GPS coefficient of vertical
dilution. The smaller this value becomes, the more accurate the
position.
Ye s
*09 Checksum Yes
Note:
“Yes” indicates the presence of the valid output.
“No” indicates the absence of the valid output.