Appeal 2007-0277
Application 10/270,236
includes the steps of: …] selecting another GPS satellite not a member of
said first set of GPS satellites; determining an apparent range of said GPS
receiver positioned at said second location to said other GPS satellite;
calculating an estimated range from said GPS receiver positioned at said
second location to said other satellite using said corrected position; and
calculating a range error correction for said other GPS satellite based on the
difference between said estimated range and apparent range.
9. Column 6, lines 32-37 of Huston read as follows:
[This dynamic calibration of a new satellite is performed by first
determining a corrected position of the GPS receiver. This corrected
position is obtained by determining an apparent position and applying the
current error correction. Col. 6, ll. 28-31.] Second, a range from the
corrected position to the new satellite is computed. Next, a pseudorange
from the new satellite to the GPS receiver is determined using the
conventional GPS technique. Finally, the pseudorange is compared to the
computed range to derive a range correction to the pseudorange.
10. Appellants admit that a “pseudorange” is a GPS parameter. See
Specification, e.g., p. 12, l. 18.
11. The Examiner found that the only difference between the claimed subject
matter and Huston is the step to “issuing a warning.”
The difference between the claimed invention and that disclosed in Huston
et al is that the latter does not disclose the claimed feature of issuing a
warning if there is a difference or irregularity between the derived parameter
and the corresponding expected parameter. However, such missing feature
in Huston et al is clearly taught in the abstract of the Whyntie reference.
Answer 4.
12. Whyntie discloses issuing a warning when received GPS-position data does
not match stored position data.
The GPS [positional] data is received by the receiver 6 and input to the
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