Download GNSS Receiver External Interface Specification

RECEIVER OBJECTS
Ob jec ts Re fe re nc e
Positioning Parameters
SNR Mask for Position Computation
Name:
Access:
Type:
Values:
Default:
/par/pos/minsnr
rw
integer [dB*Hz]
[0…50]
30
Satellites whose signal-to-noise ratios are lower than this value will be excluded from
position computation.
Position Computation Mode
Name:
/par/pos/mode/cur
Access: rw
Type:
enumerated
Values: pd,pf,cd,wd,sp
Default: sp
pd – carrier phase differential (RTK) with fixed ambiguities
pf – carrier phase differential (RTK) with float ambiguities
cd – code differential (DGPS) mode
wd – wide area code differential mode (WDGPS) using SBAS corrections
sp – single point positioning mode3
These computation modes are arranged in the order of increasing of their typical accuracy, sp being the lowest, and pd being the highest accuracy mode. Receiver will try to
compute position according to the mode specified by this parameter. If for whatever reason it fails to compute corresponding position, it will try to use the next mode below the
current one, provided the mode is enabled by corresponding parameter (see below). This
process continues down the list of modes until either some position is enabled and could
be computed, or all the modes are exhausted.
Note:
In fact receiver will still compute single point position for its internal purposes, though it will not
make it available for output if disabled.
Note:
Current implementation of code differential mode has a limitation. There are cases when receiver
will not try to compute single point position when it failed to compute code differential position
even though there are enough data.
3. Also known as “absolute positioning”, “stand-alone positioning” or simply “point positioning”
GREIS
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