Embodiments described herein provide for enabling a mobile device comprising a GNSS receiver to implement a modified PPP technique that utilizes orbit and clock information of a satellite that is broadcast from the satellite. In particular, embodiments may utilize a positioning engine to perform PPP error mitigation with respect to various error sources (e.g., troposphere, ionosphere, phase windup, etc.). With regard to errors stemming from satellite orbit and satellite clock, embodiments may utilize orbit and clock information from broadcast ephemeris data rather than obtaining precise orbit and clock information (e.g., from a third party provider). Further, embodiments may account for errors in this broadcast information by adjusting the ambiguity dynamic and/or ambiguity estimate term used by the positioning engine. This can enable the positioning engine to determine a solution more accurate than traditional GNSS without resetting.

A method, apparatus and computer readable storage medium are provided for determining whether or not GNSS navigation data are potentially manipulated. In the context of a method, GNSS reference data is received that represents one or more GNSS signals observed by a reference receiver at a reference position. The method also receives GNSS navigation data and determines, at least partially based on said GNSS reference data and the GNSS navigation data, a position estimate of said reference position. The method further includes determining, at least partially based on said reference position and the position estimate of said reference position, whether or not the GNSS navigation data are potentially manipulated.

A method and apparatus for performing satellite signal acquisition are described. In one embodiment, a method for using a satellite antenna comprises estimating antenna orientation when the antenna is in motion, including estimating yaw using one or more sensors; and performing signal acquisition to search for a satellite signal with the satellite antenna by interleaving a plurality of signal searches performed by the satellite antenna, the plurality of signal searches being based on an estimated yaw.

A method and apparatus for performing satellite signal acquisition are described. In one embodiment, a method for using a satellite antenna comprises estimating antenna orientation when the antenna is in motion, including estimating yaw using one or more sensors; and performing signal acquisition to search for a satellite signal with the satellite antenna by interleaving a plurality of signal searches performed by the satellite antenna, the plurality of signal searches being based on an estimated yaw.

A method for GNSS-based localization of a vehicle includes receiving a first set of satellite orbit data, using the first set of satellite orbit data when determining a first localization result, receiving a second set of satellite orbit data, checking a plausibility of the first set of satellite orbit data using the second set of satellite orbit data, and manipulating the first set of satellite orbit data and/or the first localization result and/or a localization filter when the plausibility check was not successful.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a coordinate switch indication that indicates that the UE is to calculate a first value of a new ephemeris coordinate of a plurality of coordinates. The UE may calculate the first value of the new ephemeris coordinate based on one or more other ephemeris coordinates of the plurality of ephemeris coordinates and may generate ephemeris information, associated with a non-terrestrial communication device, based on the calculation of the first value of the new ephemeris coordinate. The UE may communicate with the non-terrestrial communication device based on the ephemeris information. Numerous other aspects are described.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a coordinate switch indication that indicates that the UE is to calculate a first value of a new ephemeris coordinate of a plurality of coordinates. The UE may calculate the first value of the new ephemeris coordinate based on one or more other ephemeris coordinates of the plurality of ephemeris coordinates and may generate ephemeris information, associated with a non-terrestrial communication device, based on the calculation of the first value of the new ephemeris coordinate. The UE may communicate with the non-terrestrial communication device based on the ephemeris information. Numerous other aspects are described.

A method, apparatus and computer program product determine a position of a client computing device. In the context of a method, a parameter, such as an orbit or a clock, associated with a respective navigation satellite are predicted, with the client computing device, based on data associated with the respective navigation satellite. The method also includes providing time information to a correction service identifying the data used as a basis for predicting the parameter associated with the respective navigation satellite. The method further includes receiving, from the correction service, a correction to the parameter that has been predicted for the respective navigation satellite and determining the position of the client computing device based upon the parameter that has been predicted for the respective navigation satellite in combination with the correction thereto.

A sensor device includes a processor configured to communicate with a user terminal as a communication apparatus that downloads positioning satellite information from a management server, acquires a current location by using the positioning satellite information, acquires action information indicating a result of an action of a user, and when the action information is acquired, instruct the user terminal to download the positioning satellite information from the management, and execute a process for acquiring a prediction ephemeris from the user terminal.

A sensor device includes a processor configured to communicate with a user terminal as a communication apparatus that downloads positioning satellite information from a management server, acquires a current location by using the positioning satellite information, acquires action information indicating a result of an action of a user, and when the action information is acquired, instruct the user terminal to download the positioning satellite information from the management, and execute a process for acquiring a prediction ephemeris from the user terminal.