NavCom StarUtil-3000 Rev.A - Manual (Page 85)

StarUtil-3000 User Guide – Rev A
StarFire QuickStart
QuickStart is a feature that eliminates the convergence period for StarFire enabled receivers.
This function allows the StarFire navigation solution to be initialized to an accurately known
ITRF-05 position, and therefore eliminate lengthy convergence times.
The QuickStart (user input) position must have a better than decimeter accuracy to achieve
maximum results. Any error in the user input position will bias the StarFire position error
accordingly, until convergence can correct the bias. In this case, convergence may take longer
than the typical startup convergence period.
The receiver must be navigating in StarFire mode before QuickStart can be initiated (see
Figure 100). This typically occurs in about three minutes after start up.

The convergence period is the time necessary for the received StarFire signal
corrections to be applied and the position filtered to optimal performance. The
convergence period is typically 30 to 45 minutes to achieve <decimeter accuracy.
This period may b
e overcome using the QuickStart method.
Figure 108: StarFire QuickStart Window
Refer to Figure 108 for the options below:
 Position: Use only a fully converged solution at 10cm. If known, the coordinates may be
entered manually.
 Click the Use Current Solution button to retrieve the current navigation solution from the
PVT1B message. Only use this option when the solution is fully converged.

It is best to retrieve the current navigation solution at the end of the day to use as
the next day’s starting position. Write down the retrieved information.
Example of QuickStart Use
The steps below present a typical use of QuickStart after extended use of a StarFire enabled
NavCom receiver with a fully converged solution at 10cm.
Refer to Figure 108 for the steps below:
 At the end of a work day, when the equipment is parked, use QuickStart to record the
converged position.
 Click the StarFire QuickStart option in StarUtil-3000 to open the StarFire QuickStart window.
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