Enhanced GNSS signal processing
First Claim
1. A method for processing GNSS signals, comprising:
- a. Acquiring an image representing surroundings of an antenna,b. Determining whether an expected location of a GNSS satellite corresponds to a region of the image representing unobstructed sky, andc. Classifying as usable signals received from a GNSS satellite whose expected location corresponds to a region of the image representing unobstructed sky.
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Accused Products
Abstract
In accordance with embodiments of the invention, a skyward-looking sensor enables classification of points in its hemispherical field of view as either sky, partial sky or not sky, which in turn enables determination from data supplied by the GNSS receiver of whether each satellite in the GNSS antenna'"'"'s field of view is in a region of sky, partial sky or not sky. Pseudrange and phase data from GNSS satellites determined to be in a region of sky can be considered reliable and used with confidence in a positioning solution. Pseudrange and phase data from GNSS satellites determined to be in a region of partial sky can be considered suspect and can therefore only contribute to a position solution with limited confidence and decreased accuracy. Pseudorange and phase data from GNSS satellites determined to be in a region of no sky can be considered unreliable and excluded from use in a positioning solution.
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Citations
29 Claims
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1. A method for processing GNSS signals, comprising:
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a. Acquiring an image representing surroundings of an antenna, b. Determining whether an expected location of a GNSS satellite corresponds to a region of the image representing unobstructed sky, and c. Classifying as usable signals received from a GNSS satellite whose expected location corresponds to a region of the image representing unobstructed sky. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus for processing GNSS signals, comprising:
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a. An imager to acquire an image representing surroundings of an antenna, and b. A comparator to determine whether an expected location of a GNSS satellite corresponds to a region of the image representing unobstructed sky, and to classify as usable signals received from a GNSS satellite whose expected location corresponds to a region of the image representing unobstructed sky. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification