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RoyalTek GPS Receiver REB-2000/REB-12R REV-2000 Operational Manual
11
Age of Diff. Corr. second Null fields when DGPS is not used
Diff. Ref. Station ID 0000
Checksum *18
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Table 2-1 Position Fix Indicator
Value Description
0 Fix not available or invalid
1 GPS SPS Mode, fix valid
2 Differential GPS, SPS Mode, fix valid
3 GPS PPS Mode, fix valid
GLL-Geographic Position –
Latitude/Longitude
Table 3 contains the values of the following
example:$GPGLL, 3723.2475, N,
12158.3416, W, 161229.487, A*2C
Table 3 GLL Data Format
Name Example Units Description
Message ID $GPGLL GLL protocol header
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.3416 Dddmm.mmmm
E/W Indicator W E=east or W=west
UTC Position 161229.487 hhmmss.ss
Status A A=data valid or V=data not valid
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GSA-GNSS DOP and Active Satellites
Table 4 contains the values of the following
example:$GPGSA, A, 3, 07, 02, 26,
27, 09, 04, 15, , , , , , 1.8,1.0,1.5*33
Table 4 GSA Data Format
Name Example Units Description
Message ID $GPGSA GSA protocol header
Mode 1 A See Table 4-2
Mode 2 3 See Table 4-1
Satellite Used 07 Sv on Channel 1
Satellite Used 02 Sv on Channel 2
…. ….
Satellite Used 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
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Table 4-1 Mode 1
Value Description
1 Fix not available
2 2D
3 3D