EM-406a
Specifications are subject to be changed without notice.
Page 8 of 13
Version 1.4.1
Number of Messages
1
2
Range 1 to 3
Message Number
1
1
Range 1 to 3
Satellites in View
07
Satellite ID
07
Channel 1(Range 1 to 32)
Elevation
79
degrees
Channel 1(Maximum90)
Azimuth
048
degrees
Channel 1(True, Range 0 to 35
SNR(C/No)
42
dBHz
Range 0 to 99,null when not tra
…….
…….
Satellite ID
27
Channel 4 (Range 1 to 32)
Elevation
27
Degrees
Channel 4(Maximum90)
Azimuth
138
Degrees
Channel 4(True, Range 0 to 35
SNR(C/No)
42
dBHz
Range 0 to 99,null when not tra
Checksum
*71
<CR><LF>
End of message termination
Depending on the number of satellites tracked multiple messages of GSV data may be required.
RMC-Recommended Minimum Specific GNSS Data
Table B-9 contains the values for the following example:
$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598,,*10
Table B-9 RMC Data Format
Name
Example
Units
Description
Message ID
$GPRMC
RMC protocol header
UTC Time
161229.487
hhmmss.sss
Status
A
A=data valid or V=data not valid
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
Speed Over Ground
0.13
knots
Course Over Ground
309.62
degrees True
Date
120598
ddmmyy
Magnetic Variation
2
degrees
E=east or W=west
Checksum
*10
<CR><LF>
End of message termination
SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are
Geodetic WGS48 directions.
VTG-Course Over Ground and Ground Speed
$GPVTG,309.62,T,,M,0.13,N,0.2,K*6E
Table B-9 VTG Data Format
