Method of satellite status judgment
First Claim
1. A method of satellite status judgment, the method comprising steps of:
- selecting, by a positioning apparatus, a plurality of observation satellites from a plurality of satellites according to a first condition;
selecting, by the positioning apparatus, each of the observation satellites in turn as a target satellite;
obtaining, by the positioning apparatus, a variation slope of a signal of the target satellite at a first observation time period, wherein the variation slope is determined according to a change in carrier-to noise ratio measurements of the signal over the first observation time period;
determining, by the positioning apparatus, whether the target satellite should be masked according to the variation slope of the signal over the first observation time period;
generating, by the positioning apparatus, a prompt message when it is determined that the target satellite should be masked;
masking, by the positioning apparatus, positioning signals transmitted from the target satellite according to the prompt message;
obtaining the variation slope of the signal of the target satellite at a plurality of observation time periods subsequent to the first observation time period; and
determining whether the variation slope of the signal has a positive slope for a predetermined number of subsequent observation time periods in a row greater than one, and if so, no longer masking the target satellite.
1 Assignment
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Accused Products
Abstract
A method of satellite status judgment and computer program includes steps of selecting a plurality of observation satellites from a plurality of satellites according to a first condition, selecting, by the positioning apparatus, each of the observation satellites in turn as a target satellite, obtaining a signal variation slope of a first signal of a target satellite during a first observation time period, determining whether the target satellite should be masked according to the slope of the first signal, generating a prompt message when it is determined that the target satellite should be masked, and masking positioning signals transmitted from the target satellite according to the prompt message.
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Citations
14 Claims
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1. A method of satellite status judgment, the method comprising steps of:
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selecting, by a positioning apparatus, a plurality of observation satellites from a plurality of satellites according to a first condition; selecting, by the positioning apparatus, each of the observation satellites in turn as a target satellite; obtaining, by the positioning apparatus, a variation slope of a signal of the target satellite at a first observation time period, wherein the variation slope is determined according to a change in carrier-to noise ratio measurements of the signal over the first observation time period; determining, by the positioning apparatus, whether the target satellite should be masked according to the variation slope of the signal over the first observation time period; generating, by the positioning apparatus, a prompt message when it is determined that the target satellite should be masked; masking, by the positioning apparatus, positioning signals transmitted from the target satellite according to the prompt message; obtaining the variation slope of the signal of the target satellite at a plurality of observation time periods subsequent to the first observation time period; and determining whether the variation slope of the signal has a positive slope for a predetermined number of subsequent observation time periods in a row greater than one, and if so, no longer masking the target satellite. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A non-transitory computer-readable medium encoded with computer-executable instructions that, when executed, cause an electronic apparatus to perform a method of satellite status judgment, the method comprising steps of:
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selecting a plurality of observation satellites from a plurality of satellites according to a first condition; selecting each of the observation satellites in turn as a target satellite; obtaining a variation slope of a signal of the target satellite at a first observation time period, wherein the variation slope is determined according to a change in carrier-to noise ratio (CNR) measurements of the signal over the first observation time period; determining whether the target satellite should be masked according to the variation slope of the signal over the first observation time period; generating a prompt message when it is determined that the target satellite should be masked; masking positioning signals transmitted from the target satellite according to the prompt message; obtaining the variation slope of the signal of the target satellite at a plurality of observation time periods subsequent to the first observation time period; and determining whether the variation slope of the signal has a positive slope for a predetermined number of subsequent observation time periods in a row greater than one, and if so, no longer masking the target satellite. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification