89
Restarting
the
GPS
Restarting
the
GPS
provides a means of giving the eXplorist information about its
approximate position. Long
time
GPS
receiver users will know
this
option
as
initializing.
To
understand when you would use
this
option, a brief explanation of how the eXplorist works
will
be
helpful.
The
GPS
constellation consists of
24
satellites and three spares
that
orbit the earth. At any
given
time
of
the
day a
different
collection
,of
satellites will be overhead.
To
keep
track
of
which satellites are in view,
the
eXplorist has a
built-in
almanac
that
uses
the
present date
and
time,
along
with
its approximate position, to
"look
up"
which satellites should
be
in view.
Every
time
you
turn
your eXplorist off,
it
records, in a special place in its memory,
the
last
position
fix
computed. Then when
it
is turned back on,
it
assumes
that
it
is
still
in
the
same
approximate location and uses
this
last position
fix
when doing its
"look
up"
in
the
almanac.
Now,
if
you
turn
your eXplorist
off
and fly across
the
country,
the
next
time
you
turn
it
back
on
it
will
think
it
is
still
at the location where
it
was turned
off
and will begin looking for
the
satellites
that
it
thinks
are overhead.
If
the
satellites are not there,
the
eXplorist begins
"polling"
the
skies,
trying
to determine which satellites are in view. This process can take
time
and can appear
as
if
the
GPS
portion of
the
eXplorist is not working. Under normal
conditions,
the
eXplorist will still
be
able to compute your position, but
this
can take longer
than normal.
Active Setup
Map Units
Pwr
Managemenf
Personali
Z8
langUage
Clear Memory
Alarms
&Beeper
Clock
4.
Use
the
Arrow
joystick
to
highlight
Restart
GPS.
5. Press ENTER.
Restart
GPS
gives you
the
ability
to
give
the
eXplorist its approximate location, hence
speeding up
the
time
to acquire its
first
fix. Many eXplorist users will never need
to
use
the
Restart
GPS
option, but
it
is available should the need arise.
When
to
use
Restart
GPS:
• When
the
eXplorist has been moved more than
500
miles
(804.67
km) while turned off.
• When
the
eXplorist
is
sluggish and takes more than a few
minutes
to compute its
first
position
fix
when turned on. (This really
isn't
an
option
that
you need
to
be
concerned
about. Thanks to a
built-in
feature,
the
eXplorist, when
it
has trouble
computing
its
first
position fix, automatically asks you to supply your approximate position.)
Restarting
the
GPS:
1. Press MENU.
2. Use
the
Arrow
joystick
to
highlight
Preferences.
3.
Press ENTER.
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