Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2011-04-19
2011-04-19
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C342S357670
Reexamination Certificate
active
07928902
ABSTRACT:
A positioning method that performs current position calculations and outputs a positioning result position includes searching for satellite signals transmitted from positioning satellites to acquire satellites, combining satellites among the acquired satellites to extract satellite sets used for positioning, performing first positioning calculations on each calculation-target satellite set among the extracted satellite sets using the satellite signals transmitted from the acquired satellites included in the calculation-target satellite set, performing second positioning calculations on each calculation-target satellite set among the extracted satellite sets using the satellite signals transmitted from the acquired satellites that are included in the calculation-target satellite set, but do not include a low-elevation-angle satellite, and determining whether or not a positioning result obtained using the calculation-target satellite set is appropriate based on the difference between a position calculated by the first positioning calculations and a position calculated by the second positioning calculations, the elevation angle of the low-elevation-angle satellite satisfying a given low elevation angle condition, and determining the positioning result position from the positions calculated by the first positioning calculations on the satellite sets for which the positioning result has been determined to be appropriate.
REFERENCES:
patent: 5448773 (1995-09-01), McBurney et al.
patent: 7750848 (2010-07-01), Normark et al.
patent: 2003/0016170 (2003-01-01), Jandrell
patent: 2009/0002234 (2009-01-01), Normark et al.
patent: 04127077 (1992-04-01), None
patent: 2003-240836 (2003-08-01), None
Global IP Counselors, LLP
McGue Frank
Seiko Epson Corporation
Tarcza Thomas H
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