Culled satellite ephemeris information based on limiting a...

Details Culled satellite ephemeris information based on limiting a... Culled satellite ephemeris information based on limiting a...

2006-08-15

2006-08-15

Tarcza, Thomas H. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07091905

ABSTRACT:
Locating satellites (e.g., GPS) are culled into a sub-plurality based largely on dwell time within an inverted cone above a relevant site in communication with a wireless device. A first inverted cone having a first base angle is defined above a first site, a second inverted cone having a second base angle is defined above a second site. If the second site is farther from an equator of Earth than the first site, then the second inverted cone is made to have a base angle larger than a base angle of the first inverted cone. If the first site is farther from the equator of Earth than the second site, then the first inverted cone is made to have a base angle larger than a base angle of the second inverted cone. The span of the inverted cone over the site closest to the equator may be limited.

REFERENCES:
patent: 4445118 (1984-04-01), Taylor et al.
patent: 6067045 (2000-05-01), Castelloe et al.
patent: 6580390 (2003-06-01), Hay
patent: 6650288 (2003-11-01), Pitt
patent: 6985105 (2006-01-01), Pitt et al.

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