Methods and systems for mobile navigational applications using global navigation satellite systems
First Claim
1. A method for facilitating vertical and horizontal guidance for mobile users using two or more independent global navigation satellite systems (GNSSs), comprising:
- detecting an occurrence of one or more satellite signal faults in either one of the two independent GNSS constellations when two or more satellites become faulty simultaneously, the detecting occurring at a substantially consistent detection probability in accordance with any specified detection probability requirement; and
deriving vertical protection levels (VPLs) and horizontal protection levels (HPLs) by trading accuracy for integrity;
wherein the detecting and deriving are (i) in position domain and (ii) determinative of safety of the mobile user.
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Abstract
The present invention relates to providing navigation guidance for mobile users, using Global Navigation Satellite Systems (GNSSs) for applications where the user position needs to be determined in real time while meeting the navigation requirements, especially integrity requirement, for the given application. The present invention assists in providing guidance with a high availability of integrity function by trading accuracy for integrity for two different types of navigation applications. A first type of application requires a capability of detecting an occurrence of multiple satellite signal faults; the first embodiment of the invention provides this capability with a high availability of integrity, using two or more independent GNSSs. A second type of application requires a capability of detecting an occurrence of a single satellite signal fault; the second embodiment of the invention provides this capability with a high availability of integrity, using any one or a combination of GNSSs. The detecting and deriving of both methods are (i) in position domain and (ii) determinative of mobile user safety.
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Citations
27 Claims
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1. A method for facilitating vertical and horizontal guidance for mobile users using two or more independent global navigation satellite systems (GNSSs), comprising:
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detecting an occurrence of one or more satellite signal faults in either one of the two independent GNSS constellations when two or more satellites become faulty simultaneously, the detecting occurring at a substantially consistent detection probability in accordance with any specified detection probability requirement; and deriving vertical protection levels (VPLs) and horizontal protection levels (HPLs) by trading accuracy for integrity; wherein the detecting and deriving are (i) in position domain and (ii) determinative of safety of the mobile user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for facilitating mobile user navigation in which guidance is required, using one or more GNSSs, comprising:
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detecting an occurrence of a satellite signal fault in a GNSS constellation; and deriving protection levels by trading accuracy for integrity; wherein the detecting and deriving are (i) in position domain and (ii) determinative of mobile user safety. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification