3 Command Line Reference
snp
gnp
setNMEAPrecision
getNMEAPrecision
NrExtraDigits
Compatibility
LocalDatum
MinStdDev
0 . . . 3
Nominal
Mode1
Mode2
off
only
0.000
. . . 0.001
. . . 1.000 m
RxControl: Communication > Output Settings > NMEA Output > Customize
Use these commands to define/inquire the number of extra digits in the latitude, longitude
and altitude reported in NMEA sentences and to tune certain sentences to be compatible
with third-party applications that are not fully compliant with the NMEA 0183 standard.
When
NrExtraDigits
is 0, the latitude and longitude are reported in degrees with 5 decimal
digit, and altitude is reported in meters with 2 decimal digit. These default numbers of digits
lead to a centimeter-level resolution of the position. To represent RTK positions with their
full precision (millimeter-level), it is recommended to set
NrExtraDigits
to 2.
Note that increasing the number of digits (setting
NrExtraDigits
to a non-zero value) may cause
the NMEA standard to be broken, as the total number of characters in a sentence may end
up exceeding the prescribed limit of 82.
When setting the argument
Compatibility
to
Mode1
, the GPS Quality Indicator in GGA sen-
tences is set to the value "2: Differential GPS" for all non-standalone positioning modes, the
Mode Indicator in GNS sentences is set to "D: Differential" for all non-standalone positioning
modes, and the Course Over Ground in the VTG sentences is not a null field for stationary
receivers.
When setting the argument
Compatibility
to
Mode2
, the Course Over Ground in the VTG sen-
tences is not a null field for stationary receivers.
The
LocalDatum
argument specifies whether transformation parameters sent out by the RTK
service provider should be applied or not in NMEA sentences GGA and GNS. If
LocalDatum
is
off
, the transformation parameters are not applied, and the coordinates in GGA and GNS
correspond to the coordinates in the
SBF block. If
LocalDatum
is
only
and the
relevant transformation parameters have been received, the coordinates are transformed to
the local datum and correspond to the
SBF block. If the transformation param-
eters are not available, the coordinates are untransformed (in particular, the datum setting
of the
command has no effect). The TFM proprietary NMEA sentence
can be used to determine which transformation has been applied.
The
MinStdDev
argument defines the minimum standard deviation values that can be en-
coded in the GST sentence. If an actual standard deviation is below the value provided in
MinStdDev
, the value in
MinStdDev
is encoded instead.
Example
COM1>
snp, 2, Mode2, off, 0.05<CR>
$R: snp, 2, Mode2, off, 0.05
NMEAPrecision, 2, Mode2, off, 0.050
COM1>
211
Содержание PolaRx5TR
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