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Enable Solutions
The Standalone checkbox, if selected, will allow the receiver, running in a differential mode, to
yield the absolute position in case the receiver is not able to get a differential solution position. The
checkbox is associated with the receiver parameter /par/pos/mode/sp.
At the present time, the checkboxes DGPS (Code Differential), RTK
Float and RTK Fixed are unavailable and being checked at the same time
demonstrating that these solution types are also enabled.
RTK Parameters
The RTK mode radio button group serves to toggle between the
extrapolation
and
delay
modes.
If Extrapolation is selected, the rover will extrapolate the base station's carrier phase meas-
urements when computing the rover's current RTK position. If Delay is selected, the rover
will not
extrapolate the base station's carrier phase measurements to compute the current rover position.
Instead, the RTK engine will compute either a delayed RTK position (for the epoch to which the
newly received RTCM/CMR message corresponds) or the current stand-alone position (while waiting
for new RTCM/CMR messages coming from the base). These radio buttons relate to the receiver
parameter /par/pos/pd/mode.
To define the rover dynamics, use the Dynamics radio button group. The corresponding parame-
ter is /par/pos/pd/dyn.
The Ambiguity Fixing Level radio buttons govern the process of the RTK engine fixing inte-
ger ambiguities. The RTK engine uses the
ambiguity fix indicator
when making a decision whether
to fix ambiguities or not. Low, Medium and High correspond to the indicator's 95%, 99.5%
and 99.9% states, respectively. The higher the specified confidence level, the longer the integer
ambiguity search time. This is the price we one pays for the higher reliability of the ambiguity fixed
solution. These buttons are associated with the receiver parameter /par/pos/pd/aflevel
The Measurements Used checkbox group allows the user to select measurement types used
by the rover for position computation. The checkbox CA/L1 corresponds to the receiver parame-
ter /par/pos/pd/meas/ca, the control P/L1 corresponds to the receiver parameter /par/pos/pd/meas/p1,
the control P/L2 is associated with the receiver parameter /par/pos/pd/meas/p2.
In the Base Corrections period edit box, the user can set the differential correction update
interval. It should be noted here that the user must know the exact rate at which the reference sta-
tion broadcasts its differential correction data. This edit box corresponds to the receiver parameter
/par/pos/pd/period.
The receiver will use the control Base Corrections period only if it runs in
Delay mode. Also, this edit box is used to provide more reliable synchronization
between the base station and rover.
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