11
Motorola GPS Products
M12 Oncore User’s Guide Supplement
Revision 1.0 01/25/00
10.
Serial I/O Messages
10.1
Solution
Update rate
1 Hz maximum (Selectable 1/s – 1/255s)
Latency
< 1 s
Reported
Position, velocity, time, satellite status, receiver status,
antenna status
Reference
WGS-84 or user defined datum
10.2
Resolution
Latitude/longitude
1 milliarcsecond
Height
0.01 m
Velocity
0.01 m/s
Heading
0.1°
Time
1 ns
10.3
Solution quality indicators
Receiver status
3D, 2D, propagation, acquisition
Geometry
HDOP when in 2D mode
PDOP when in 3D mode
Satellite status
C/No (dB)
Flag indicating satellite tracking status
Flag indicating satellite is used in solution
10.4
Initialization
Startup mode
Acquisition based on information available
Battery backup provided
No initialization required
No battery backup
Receiver will be in default condition, entering date, time,
position and almanac will speed up acquisition process
Default condition
No serial messages active unless there is a power-on self-
test failure
10.5
RTCM Commands
The M12 Oncore accepts RTCM SC-104 Type 1 and Type 9 messages. The messages are
input on the second communications port (pin 8) at a user selectable baud rate of 2400,
4800 or 9600. The RTCM messages are buffered and processed independently from the
primary communications port.
