Appeal No. 2002-0767
Application No. 09/382,381
specification, appellants emphasize that instead of changing the
A/P software to handle the above-noted antenna separation error
(which would require recertification), the present invention uses
the concepts of vertical guidance point (102) and vertical lever
arm correction vectors (110, 130) to address the error introduced
by the physical separation of the GPS and ILS antennas. As noted
on page 10, this calibration or measurement is done once at the
time the aircraft is being retrofit with the present GLS system,
and then (as noted on page 12) the lever arm correction vector
data is programmed in the aircraft personality module (APM) and
made available to the GLS precision approach navigator (PAN), or
programmed directly into the PAN. Thus, in our view, it would
have been clear to one skilled in the art that the "means for
generating enhanced position signals" of claim 1 and the "means
for generating a deviation signal" of claim 18 are both computer
processors (e.g., in the PAN) executing predetermined computer
software including a correction for the antenna location
separation distance error noted by appellants.
As an alternative to the foregoing, appellants note
(specification, page 12) that the APM programming and computation
of the enhanced deviation/position signals can be done within the
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