NavCom StarUtil-3000 Rev.A - Manual (Page 92)

StarUtil-3000 User Guide – Rev A
8-90
[SOLIDEARTHTIDE]
This command is used to enable or disable the correction of solid earth tide. When solid earth
tide is on, its correction will be automatically applied to StarFire single and dual solution only. It
won’t be applied to non-dif and WAAS mode solution due to the fact that the correction is small
compared to the solution accuracy in those modes. It won’t be applied to the solution in relative
positioning modes, including RTK, RTK Extend, and code DGPS.

Refer to Chapter 9/ Solid Earth Tide for more information.
RTK Base Control
The messages which follow configure the receiver as a base or rover, set up the base position,
set the site ID, etc. RTK Base Control is accomplished by several input parameters which are
identified by the following command messages:
[RTKMODE]
This command is used to configure the receiver as a base or rover, including these parameters:
correction type, station id, and UART port.
Examples: [RTKMODE] Base5E,,3,2
Configures the receiver to be a Base5E type base station; the base site ID is 3, with
the UART output port set to 2.
[RTKMODE] Rover,NCT,0,
Configures the receiver to be a NCT type rover with the rover site ID set to 0. It will
apply any base station correction received. To set a particular base station to apply,
specify the base station’s site ID. The port parameter must be empty for rover
mode. A rover accepts the identified correction format on any port.

Setting the base and rover to the identical site ID, avoids cross talk between the
rover and any other base in the area that may be set to the same frequency. For
multiple base stations, use a different site ID for each one.
[REFNAME]
This command assigns a name for a reference station.
Example Reference Station Name: [REFNAME]"NAVCOMREF1"
Set Up Base Position
The base position accuracy is extremely important, as any error in the input base
position will directly bias the rover position.
The position of the base station is set manually via the [REFSTNPOS] command or via the
[SELFSURVEY] command, which uses the SF-3050’s ability to self survey by averaging the
GNSS positions received over time.
No GNSS correction output will commence unless this information is entered and locked in. The
amount of time required to achieve a high degree of accuracy is dependent on the navigation
mode, and the number of epochs used in the Self Survey algorithm. Since the Self Survey
position is a straight average of the valid navigation epoch, it stands to reason that the longer
the system is left in self survey mode, the better the accuracy. The self survey quality can be
expedited by using aided navigation epochs as opposed to autonomous navigation epochs.