SkyTraq PX1120S - Page 17

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SkyTraq Technology, Inc. Preliminary Draft www.skytraq.com.tw
RMC – Recommended Minimum Specific GNSS Data
Time, date, position, course and speed data provided by a GNSS navigation receiver.
Structure:
$GNRMC,hhmmss.sss,A,dddmm.mmmmm,a,dddmm.mmmmm,a,x.x,x.x,ddmmyy,,,a,a*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10 11 12
Example:
$GNRMC,052315.000,A,2447.09094,N,12100.52369,E,000.0,169.9,261219,,,D,V*0F<CR><LF>
Field
Name
Example
Description
1
UTC time
052315.000
UTC time in hhmmss.sss format (000000.00 ~ 235959.999)
2
Status
A
Status
‘V’ = Navigation receiver warning
‘A’ = Data Valid
3
Latitude
2447.09094
Latitude in dddmm.mmmmm format
Leading zeros transmitted
4
N/S indicator
N
Latitude hemisphere indicator
‘N’ = North
‘S’ = South
5
Longitude
12100.52369
Longitude in dddmm.mmmmm format
Leading zeros transmitted
6
E/W Indicator
E
Longitude hemisphere indicator
‘E’ = East
‘W’ = West
7
Speed over ground
000.0
Speed over ground in knots (000.0 ~ 999.9)
8
Course over ground
169.9
Course over ground in degrees (000.0 ~ 359.9)
9
UTC Date
261219
UTC date of position fix, ddmmyy format
10
Mode indicator
D
Mode indicator
‘A’ = Autonomous mode
‘D’ = Differential mode
‘E’ = Estimated (dead reckoning) mode
‘F’ = Float RTK. Satellite system used in RTK mode, floating
integers
‘M’ = Manual Input Mode
‘N’ = Data not valid
‘P’ = Precise
‘R’ = Real Time Kinematic. System used in RTK mode with fixed
integers
‘S’ = Simulator Mode
11
Navigation status
Navigation status indicator according to IEC61108 requirement
on ‘Navigational (or Failure) warnings and status indicators’.
‘S’ = Safe
‘C’ = Caution
‘U’ = Unsafe
‘V’ = Navigation status not valid, equipment is not providing
navigation status indicator.
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