Rikaline – Rikaline GPS-24/24A User Manual
Page 12
GPS Receiver Board
GPS-24 / 24A Operating Manual
Rikaline
Specifications subject to change without prior notice
Rikaline
International Corp.
14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan
Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail:
Web: www.rikaline.com.tw
Message Number
1
Range 1 to 3
Satellites in View
07
Range 1 to 12
Satellite ID
07
Channel 1 (Range 1 to 32)
Elevation
79
degrees Channel 1 (Maximum 90)
Azimuth
048
degrees Channel 1 (True, Range 0 to 359)
SNR (C/No)
42
dBHz
Range 0 to 99, null when not tracking
.... ....
Satellite ID
27
Channel 4 (Range 1 to 32)
Elevation
27
degrees Channel 4 (Maximum 90)
Azimuth
138
degrees Channel 4 (True, Range 0 to 359)
SNR (C/No)
42
dBHz
Range 0 to 99, null when not tracking
Checksum *71
<CR> <LF>
End of message termination
NOTE:
Items <4>,<5>,<6> and <7> repeat for each satellite in view to a maximum of four (4) satellites per
sentence. Additional satellites in view information must be sent in subsequent sentences. These fields will
be null if unused.
A.1.5 Recommended Minimum Specific GNSS Data (RMC)
Table A-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 A-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
Degrees E=east or W=west
Checksum *10
<CR> <LF>
End of message termination
A.1.6 Course Over Ground and Ground Speed (VTG)
Table A-10 contains the values for the following example:
$GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E
Table A-10 VTG Data Format
Name Example
Units
Description
Message ID
$GPVTG
VTG protocol header
Course 309.62
Degrees Measured
heading
Reference T
True
Course
Degrees Measured
heading
Reference M
Magnetic
(1)
Speed 0.13
Knots
Measured horizontal speed
Units N
Knots
Speed
0.2
Km/hr
Measured horizontal speed
Units
K
Kilometers per hour
Checksum *6E
<CR> <LF>
End of message termination
(1) All “course over ground” data are geodetic WGS84 directions.