Appeal No. 2000-2085
Application No. 08/803,937
aircraft. Claims 1 and 8 are representative and read as
follows:
1. A method for determining a position of an
object utilizing two-way ranging among a
plurality of satellites at known locations in
communication with a ground station, the method
comprising:
transmitting a first ranging signal from a
first satellite in a first orbit at a first
known location to the object as directed by the
ground station;
transmitting a second ranging signal from
the object to the first satellite in response to
the first ranging signal for receipt by the
ground station;
transmitting a third ranging signal from
one of the first satellite and a second
satellite in a second orbit at a second known
location to the object as directed by the ground
station;
transmitting a fourth ranging signal from
the object to the other one of the first
satellite and the second satellite in response
to the third ranging signal for receipt by the
ground station;
determining a first delay corresponding to
a time difference between transmission of the
first ranging signal and receipt of the second
ranging signal;
determining a second delay corresponding to
a time difference between transmission of the
2
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