A system and a method to track GPS (Global Positioning System) satellite
signal in a GPS receiver that includes an expanded capture window to
rapidly reacquire the satellite signal after the satellite signal has
been obstructed or when there is other type of signal loss. The expanded
capture window includes a plurality of additional early and late
correlations for maintaining synchronization of the GPS signal with a
generated replica signal when positional error has accumulated during the
time of the signal loss. The plurality of additional early and late
correlations may be delayed from each other by a multiple of a fraction
of a chip and may be performed in one or multiple channels of the GPS
receiver. The adjoining code samples in the replica signal may also be
offset by a fraction of a chip or by a multiple of the fraction of a
chip.