Download GNSS Receiver External Interface Specification

RECEIVER OBJECTS
Ob jec ts Re fe re nc e
Positioning Parameters
Filtering Position Estimates
Position Filter Mode
Name:
Access:
Type:
Values:
Default:
/par/pos/filt/mode
rw
boolean
on,off
off
Position Filter Type
Name:
/par/pos/filt/type
Access: r
Type:
enumerated
Values: stat
stat – simple N-point weighted moving average is used to smooth the current position.
Note that this type of position filter normally applies only to static (or “nearly static”)
receivers in sp or cd mode. It is especially useful when the number of tracked satellites
changes abruptly; in this case the position accuracy may temporarily drop dramatically
unless the position filter is on. For moving receivers, using this type of position filter
may adversely affect the receiver trajectory's accuracy.
Position Filter Width
Name:
Access:
Type:
Values:
Default:
/par/pos/filt/num
rw
integer
[1…10000]
30
This parameter designates the number of the preceding pre-filtered position measurements used by the least-squares estimator to obtain the current smooth position. Provided /par/pos/filt/type is stat (the only one currently supported), this estimator is
just an N-point weighted running average.
Maximum Allowed Time Gap
Name:
Access:
Type:
Values:
Default:
GREIS
/par/pos/filt/maxdel
rw
integer [seconds]
[1…3600]
10
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