Culled satellite ephemeris information based on limiting a span of an inverted cone for locating satellite in-range determinations
First Claim
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1. A method of culling a plurality of locating airborne positioning devices into a sub-plurality for communication by a plurality of wireless devices, comprising:
- defining a first inverted conical shape corresponding to a first point, said first inverted conical shape having a first average base angle; and
defining a second inverted conical shape corresponding to a second point, said second inverted conical shape having a second average base angle;
wherein if said second point is farther from an equator of Earth than said first point, then said second inverted conical shape is made to have an average base angle larger than an average base angle of said first inverted conical shape; and
if said first point is farther from said equator of Earth than said second point, then said first inverted conical shape is made to have an average base angle larger than an average base angle of said second inverted conical shape.
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Accused Products
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.
5 Citations
25 Claims
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1. A method of culling a plurality of locating airborne positioning devices into a sub-plurality for communication by a plurality of wireless devices, comprising:
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defining a first inverted conical shape corresponding to a first point, said first inverted conical shape having a first average base angle; and defining a second inverted conical shape corresponding to a second point, said second inverted conical shape having a second average base angle; wherein if said second point is farther from an equator of Earth than said first point, then said second inverted conical shape is made to have an average base angle larger than an average base angle of said first inverted conical shape; and if said first point is farther from said equator of Earth than said second point, then said first inverted conical shape is made to have an average base angle larger than an average base angle of said second inverted conical shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for culling a plurality of locating airborne positioning devices into a sub-plurality for communication by a plurality of wireless devices, comprising:
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means for defining a first inverted conical shape corresponding to a first point, said first inverted conical shape having a first average base angle; and means for defining a second inverted conical shape above a second point, said second inverted conical shape having a second average base angle; wherein if said second point is farther from an equator of Earth than said first point, then said means for defining said second inverted conical shape defines said second inverted conical shape to have an average base angle larger than an average base angle of said first inverted conical shape; and if said first point is farther from said equator of Earth than said second point, then said means for defining said first inverted conical shape defines said first inverted conical shape to have an average base angle larger than an average base angle of said second inverted conical shape. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. Apparatus for culling a plurality of locating airborne positioning devices into a sub-plurality for communication by a plurality of wireless devices, comprising:
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means for defining a first inverted conical shape above a first point, said first inverted conical shape having a first average base angle; means for defining a second inverted conical shape above a second point, said second inverted conical shape having a second average base angle; and means for defining a third inverted conical shape above a third point, said third inverted conical shape having a third average base angle; wherein if said second point is farther from an equator of Earth than said first point, then said second inverted conical shape is made to have an average base angle larger than an average base angle of said first inverted conical shape; and if said first point is farther from said equator of Earth than said second point, then said first inverted conical shape is made to have an average base angle larger than an average base angle of said second inverted conical shape. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification
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Current AssigneeTeleCommunication Systems Inc (Comtech Telecommunications Corporation)
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Original AssigneeTeleCommunication Systems Inc (Comtech Telecommunications Corporation)
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InventorsPitt, Lance Douglas, Lamprecht, Leslie Johann, Martin, Jeffrey Thomas
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Primary Examiner(s)Tarcza, Thomas H.
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Assistant Examiner(s)MULL, FRED H
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Application NumberUS11/282,685Publication NumberTime in Patent Office267 DaysField of Search342/357.15, 342/357.09US Class Current342/357.42CPC Class CodesG01S 19/05 providing aiding dataG01S 19/258 relating to the satellite c...G01S 19/28 Satellite selection
