Culled satellite ephemeris information based on limiting a span of an inverted cone for locating satellite in-range determinations
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United States of America Patent
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Jan 10, 2006
Grant Date -
N/A
app pub date -
Mar 16, 2005
filing date -
Oct 15, 2004
priority date (Note) -
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status (Latency Note)
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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.
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