NavCom Sapphire Rev.J - Manual (Page 197)

Sapphire Technical Reference Manual Rev. J
197
1.143 RAPIDRECOVERY
SF-3050 Sapphire SF-3040
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 (Figure of Merit
– FOM, representing the best-guess accuracy of the
horizontal position).
Command: [RAPIDRECOVERY] command <,FOM>
Parameter Definition
Command
Keyword: either (“ENABLE<,FOM>” or “DISABLE”)

ENABLE may optionally include a new value for FOM, but DISABLE
may not.
FOM
An Integer; value from 1 to 255, representing horizontal accuracy in cm.

If “DISABLE” is specified, an error return will generate indicating
invalid input.

NavCom recommends using a FOM value in the range 5-10.

This feature is available only on the GPS portion of the StarFire correction, which
constitutes the larger weighted component of the correction.
Examples:
[RAPIDRECOVERY]
views current state of Rapid Recovery and the FOM:
>[ RAPIDRECOVERY]ENABLE, 4 … or,
>[ RAPIDRECOVERY]DISABLE
[RAPIDRECOVERY]Enable
Enables use of Rapid Recovery using the existing FOM
[RAPIDRECOVERY]Disable
Disables use of Rapid Recovery
[RAPIDRECOVERY]Enable,10
Enables use of Rapid Recovery, and uses a FOM of 10