NavCom StarUtil Rev.G - Manual (Page 78)

StarUtil User Guide – Rev. G
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9 Click the Retrieve button to confirm that the position is saved.
Mode drop-down list.
y known
ickStart State: The QuickStart process goes through these modes:
• Idle: QuickStart is not initiated or in progress. Once QuickStart is initiated, Idle is
temporarily displayed if:
• Power is cycled on the unit.
• The
command, Reset QuickStart, is applied. This causes a restart of the entire RTG
navigation mode with no a-priori position information, i.e. full pull-in duration.
• Initiated: QuickStart is initiated, but is not operating. QuickStart operation does not begin
until the start of RTG navigation. This requires at least five satellites each with full dual
frequency tracking and at least 10 seconds of code-carrier smoothing. If, for example, a
QuickStart initiation request is given shortly after power-on, it may be a few minutes
before these conditions are met. During this period, the reported QuickStart mode is
Initiated.
• In Progress: QuickStart is operating. QuickStart is In Progress until the operation
completes or fails, or until a kstart command is received.
leted: A QuickStart operation completed successfully.
med
TG
is
d
least squares navigation solution performed with
ses
G extended Kalman filter. The full RTG solution is
9 Close the PC COM Port. Exit StarUtil.
9 The next day, do not move the equipment from the parked position.
9
Open StarUtil and connect to the GPS receiver. Wait for the receiver to enter RTG dual
mode.
9 Open the RTG QuickStart window.
9 Click the Retrieve button to retrieve the position saved the day before from NVRAM.
9 Select Initiate QuickStart from the Commanded QuickStart
9 Click the OK button to initiate QuickStart. When the QuickStart operation completes
successfully, the StarFire™ RTG navigation solution is initialized to the accuratel
position from the prior day, and therefore eliminates the lengthy convergence time.
„ QuickStart State
9 Current Qu
No Quickstart or Reset Quic
• Comp
• Failed Proximity Limit: While a QuickStart operation is in progress, a check is perfor
at each 1Hz navigation epoch, which compares the 3D radial distance between the R
code solution and the ‘known’ position input with the QuickStart initiation request. If th
distance exceeds 25 meters on the first QuickStart epoch, or 15 meters on any of the
subsequent epochs in the In Progress period, the QuickStart is terminated, RTG
navigation is reset (full pull-in required), and the QuickStart mode is reported as Faile
Proximity Limit.
The RTG code solution is the weighted
smoothed code (could be single or dual frequency depending on prefilter status) and
RTG clock and orbit corrections. It is independent from the full RTG solution, which u
the phase biases, estimated by the RT
initialized by a QuickStart operation.