Specifications
9-13
(3.2) Indication for GNS sentence
Device
MI
Description
Operating state Quality
Positioning Quality valid
Invalid
GPS A Autonomous GPS STD ●
D Differential GPS DGPS ●
E Estimated (dead reckoning) mode GPS EST ●
F Float Real Time Kinematic GPS FRTK ●
M Manual input mode GPS MAN ●
N No fix GPS INVALID ●
P Precise Positioning Service GPS PREC ●
R Real Time Kinematic GPS RTK ●
S Simulator mode GPS SIM ●
GLONASS
A Autonomous GL STD ●
D Differential GL DGL ●
E Estimated (dead reckoning) mode GL EST ●
F Float Real Time Kinematic GL FRTK ●
M Manual input mode GL MAN ●
N No fix GL INVALID ●
P Precise Positioning Service GL PREC ●
R Real Time Kinematic GL RTK ●
S Simulator mode GL SIM ●
Galileo A Autonomous GA STD ●
D Differential GA DGA ●
E Estimated (dead reckoning) mode GA EST ●
F Float Real Time Kinematic GA FRTK ●
M Manual input mode GA MAN ●
N No fix GA INVALID ●
P Precise Positioning Service GA PREC ●
R Real Time Kinematic GA RTK ●
S Simulator mode GA SIM ●
Others A Autonomous OTH STD ●
D Differential OTH DOTH ●
E Estimated (dead reckoning) mode OTH EST ●
F Float Real Time Kinematic OTH FRTK ●
M Manual input mode OTH MAN ●
N No fix OTH INVALID ●
P Precise Positioning Service OTH PREC ●
R Real Time Kinematic OTH RTK ●
S Simulator mode OTH SIM ●
When receiving the GNS sentence, and if the Navigational status in that sentence is S (Safe),
the quality type is checked using the MI (Mode Indicator) as mentioned in the table above.
- If the quality is valid, the operating state is indicated with the position and time information.
- If the quality is invalid, or the Navigational status is C (Caution), U (Unsafe) or V (Not valid),
the next GLL sentence is referred.
- See 5.2 for method to display the quality information on the regular screen.
Note
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