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GPS
Product series
GPZDA
4.1.1 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
Message ID
UTC Time
Latitude
N/S Indicator
Longitude
E/W Indicator
Position Fix Indicator
Satellites Used
HDOP
MSL Altitude
(1)
Units
Geoid Separation
(1)
Units
Age of Diff. Corr.
Diff. Ref. Station ID
Checksum
<CR> <LF>
(1). SiRF Technology Inc. does not support geoid corrections. Values are WGS84 ellipsoid heights.
Table 4-3 Position Fix Indicator
Value
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
HOLUX Technology, Inc.
1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux.com.tw Website:www.holux.com.tw
frequency, etc.
PPS timing message (synchronized to PPS)
Example
Units
$GPGGA
161229.487
3723.2475
N
12158.3416
W
1
07
1.0
9.0
Meters
M
Meters
Meters
M
Meters
second Null fields when DGPS is not used
0000
*18
With HOLUX, You never lose the way!
Description
GGA protocol header
hhmmss.sss
ddmm.mmmm
N=north or S=south
dddmm.mmmm
E=east or W=west
See Table 5-3
Range 0 to 12
Horizontal Dilution of Precision
End of message termination
Description
8
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