9
a navigation solution. However, the host system should allow the board set to
remain on for at least 12.5 minutes after the first satellite is acquired (see Section
4 for more information on status indications).
2) If the memory backup battery fails, the sensor board will search the sky as
described above. The system designer should be aware of the availability of
standby power input to the board set to prevent this situation.
3) If the initial data is significantly inaccurate, the board set will perform an operation
known as AutoLocate
TM
. This procedure is fully automatic and, under normal
circumstances, will require 1.5 minutes to calculate a navigation solution.
AutoLocate
TM
, unlike search the sky, does not require that the sensor board
continue to operate after a fix has been obtained.