GR-91
GPS Module series
THE PRO NAME IN GPS
HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)
TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:[email protected] http:www.holux.com.tw
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5.1.2 Global Positioning System Fix Data (GGA)
Table 4-2 contains the values for the following example:
$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M, , , ,0000*18
Table 4-2 GGA Data Format
Name
Example
Units
Description
Message ID
$GPGGA
GGA protocol header
UTC Time
161229.487
hhmmss.sss
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
Position Fix Indicator
1
See Table 5-3
Satellites Used
07
Range 0 to 12
HDOP
1.0
Horizontal Dilution of Precision
MSL Altitude
(1)
9.0
Meters
Units
M
Meters
Geoid Separation
(1)
Meters
Units
M
Meters
Age of Diff. Corr.
second Null fields when DGPS is not used
Diff. Ref. Station ID
0000
Checksum
*18
<CR> <LF>
End of message termination
(1). SiRF Technology Inc. does not support geoid corrections. Values are WGS84 ellipsoid
heights.
Table 4-3 Position Fix Indicator
Value
Description
0
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
