Ground Speed; S Irf Proprietary Nmea Input Messages - RoyalTek REB-3000 Operational Manual

RoyalTek RGM-3000/REB-3000
GPS Module Operational Manual)
Table 6 RMC Data Format
Name
Message ID
UTC Position
Status
Latitude
N/S Indicator
Longitude
E/W Indicator
Speed Over Ground
Course Over Ground
Date
Magnetic Variation
Checksum
＜CR＞＜LF＞
VTG-Course Over Ground and

Ground Speed

Table 7 contains the values of the following
Table 7 VTG Data Format
Name
Message ID
Course
Reference
Course
Reference
Speed
Units
Speed
Units
Checksum
＜CR＞＜LF＞
SiRF Proprietary NMEA Input
Messages
NMEA input messages allow you to control
the Evaluation Unit in NMEA protocol mode.
The Evaluation Unit may be put into NMEA
mode by sending the SiRF Binary protocol
message " Switch To NMEA Protocol –
Transport Message
Start Sequence
$PSRF<MID> 1
1
Message Identifier consists of three
numeric characters . Input messages begin
Example Units
$GPRMC
161229.487
A
3723.2475
N
12158.3416
W
0.13 knots
309.62 degrees
120598
degrees
*10
Example Units
$GPVTG
309.62 degrees
T
degrees
M
0.13 knots
N
0.2 km/hr
K
*6E
Payload Checksum
Data 2 *CKSUM 3
15
Description
RMC protocol header
hhmmss.sss
A=data valid or V=data not valid
ddmm.mmmm
N=north or S=south
dddmm.mmmm
E=east or W=west
True
ddmmyy
E=east or W=west
End of message termination
example:$GPVTG, 309.62, T, , M, 0.13, N,
0.2, K*6E
Description
VTG protocol header
Measured heading
True
Measured heading
Magnetic
Measured horizontal speed
Knots
Measured horizontal speed
Kilometer per hour
End of message termination
Message I.D.129 " on page 17 using a user
program or using SiRFdemo.exe and
selecting Switch to NMEA Protocol from the
Action manual. If the receiver is in SiRF
Binary mode, all the NMEA input messages
are ignored. Once the receiver is put into
NMEA mode, the following messages may
be used to command the module.
End Sequence
<CR><LF> 4
at MID 100.
2
Message specific data. Refer to a specific