NavCom SF-3050 Rev.I - Manual (Page 126)

SF-3050 GNSS Product User Guide – Rev I
107
Setting Up a StarFire Priority Network
The SF-3050 defaults to using the highest available satellite between both networks. If
multiple receivers are used on one platform, the user may force one to use Net1 and the
other to use Net2.
1. On the Input Terminal, type [SFNETPRIORITY] to view the current priority net
settings.
2. Perform one of the following:

Type [SFNETPRIORITY]DEFAULT to command the system to automatically select
the StarFire satellite with the highest elevation angle, regardless of Net1 or Net2,
but subject to authorized nets.

Type [SFNETPRIORITY]NET1
1
to set Net1 as the priority net, which commands
the receiver to select the Net1 StarFire satellite with the highest elevation angle.

Type [SFNETPRIORITY]NET2
2
to set Net1 as the priority net, which commands
the receiver to select the Net2 StarFire satellite with the highest elevation angle.

1
If there are no visible Net1 satellites, or if the receiver is licensed as Net2
only, the receiver will select the Net2 StarFire satellite with the highest
elevation angle.

2
If there are no visible Net2 satellites, or if the receiver is licensed as Net1
only, the receiver will select the Net1 satellite with the highest elevation
angle.

Refer to the Sapphire Technical Reference Manual for detailed information
on the [SFNETPRIORITY] command.
RapidRecovery
The Rapid Recovery feature provides a way to more quickly recover from the loss of
StarFire corrected positioning after loss and recovery of navigation. The receiver starts
using these corrections when the link to the navigation satellites has been lost, or has
degraded to a specified quality value called Figure of Merit (FOM) which represents the
best-guess accuracy of the horizontal position. Convergence time in StarFire mode is
virtually eliminated under certain conditions following a very brief navigational outage.
 NavCom recommends using a FOM value in the range of 5-10.
 This feature is available only on the GPS portion of the StarFire correction, which
constitutes the larger weighted component of the correction.
RapidRecovery with QuickStart
StarFire QuickStart enables Rapid Recovery when an accurately known ITRF08 position
is used to initialize StarFire navigation. This is typically a position previously surveyed and
converted to ITRF08 prior to initialization.
 This feature is available for StarFire GNSS only.
 The receiver must have a StarFire Dual Frequency solution prior to initiating