Holux GR-213U User Manual page 8

Table 5-5 GSA Data Format
Name
Message ID
Mode 1
Mode 2
Satellite Used(1)
Satellite Used (1)
......
Satellite Used
PDOP
HDOP
VDOP
Checksum
<CR> <LF>
1. Satellite used in solution.
Table 5-6 Mode 1
Value
M
A
Table 5-7 Mode 2
Value
1
2
3
5.1.4 GNSS Satellites in View (GSV)
Table 5-8 contains the values for the following example:
$GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71
$GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41
Table 5-8 GSV Data Format
Name
Message ID
Number of Messages
Message Number
Satellites in View
Satellite ID
Elevation
Azimuth
SNR (C/No)
....
Satellite ID
Elevation
Azimuth
SNR (C/No)
Checksum
<CR> <LF>
Example Units
$GPGSA
A
3
07
02
1.8
1.0
1.5
*33
Description
Manual—forced to operate in 2D or 3D mode
2DAutomatic—allowed to automatically switch 2D/3D
Description
Fix Not Available
2D
3D
Example Units
$GPGSV
2
1
07
07
79 degrees
048 degrees
42 dBHz
....
27
27 degrees
138 degrees
42 dBHz
*71
Description
GSA protocol header
See Table 5-6
See Table 5-7
Sv on Channel 1
Sv on Channel 2
....
Sv on Channel 20
Position Dilution of Precision
Horizontal Dilution of Precision
Vertical Dilution of Precision
End of message termination
Description
GSV protocol header
Range 1 to 3
Range 1 to 3
Range 1 to 12
Channel 1 (Range 1 to 32)
Channel 1 (Maximum 90)
Channel 1 (True, Range 0 to 359)
Range 0 to 99, null when not tracking
Channel 4 (Range 1 to 32)
Channel 4 (Maximum 90)
Channel 4 (True, Range 0 to 359)
Range 0 to 99, null when not tracking
End of message termination
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