83
typically within 100 feet. In addition to latitude and
longitude, the system also determines heading and
speed.
Vehicle positioning information is relayed to the
Lincoln Security Response CenterONLYduring
roadside or emergency requests. The response center
will not be able to track your location while in an
inactive state.Lincoln RESCU System LimitationsInoperative if cellular phone inactive or
inoperativeLincoln RESCU utilizes your vehicle's cellular phone
and will not operate if cellular service has not been
activated or if the phone is inoperative.Inoperative if battery discharged or
disconnectedLincoln RESCU is powered by the vehicle's battery
and will not operate if the battery is discharged or
disconnected.
Potentially inoperative if vehicle involved
in accidentIf the vehicle is involved in an accident, some
components could be damaged, rendering your
Lincoln RESCU System inoperative.Positioning capability degraded if satellite
signals obstructedVehicle positioning is accomplished by receiving and
interpreting signals transmitted by satellites. If the
signals are obstructed, positioning capability could
be degraded or lost. This situation will be most
prevalent in urban areas populated with tall
buildings. Tunnels, underpasses, parking garages,
trees, and similar structures could also adversely
affect positioning performance. Under these
conditions, the system will operate but the response
center could have difficulty identifying your current
location. (The last valid position obtained before the
obstruction is retained, however, and will be sent.)
The operator may depend on you to provide verbal
information regarding vehicle location.
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Update:Fri Sep 6 14:53:57 1996
84Positioning capability temporarily
degraded after battery reconnectWhen your vehicle is started, the Lincoln RESCU
GPS receiver begins the process of determining
vehicle location. The receiver will search the sky
and attempt to acquire signals from all visible
satellites. A real-time clock and an almanac
containing detailed information about the satellite
constellation are stored in the on-board computer's
memory and are used to expedite the search. If the
vehicle's battery is disconnected, the clock memory
is erased and time and date are lost. Once the
battery is reconnected, it could take approximately
15 minutes to reacquire the clock and for
positioning capability to be restored. During this
time, the system will operate but the response
center will not be able to identify your location. In
this situation, the operator will depend on you to
provide verbal information regarding vehicle
location.
Inoperative if cellular signal marginal or
unavailableSince the Lincoln RESCU System utilizes the
vehicle's cellular phone, it can only be operated in
geographical areas with cellular coverage. Although
approximately 90 percent of the U.S. population
lives and works in cellular coverage areas, there are
various rural or mountainous areas where coverage
is marginal or does not exist. If an activation occurs
in this situation, the messages ªNO CELLULAR
SIGNALº and ªWAITING TO ACQUIREº will
alternately be displayed on the Message Center. If
after several attempts cellular service cannot be
acquired, the message ªUNABLE TO PLACE CALLº
will be displayed, the assistance request will be
terminated and the phone will return to its normal
operating mode.
File:05fncfc.ex
Update:Fri Sep 6 14:53:57 1996
