A positioning device for determining the location of a vehicle stationary or moving on roads of a given network from positioning signals broadcasted by satellites of at least one constellation of satellites, comprising: a first unit determining a plurality of possible current positions and a plurality of time stamps, configured to: generate local replicas of positioning signals; receive, positioning signals broadcasted by one or more satellites in view; process, for each possible current position and time stamp, a correlation function between a received positioning signal and a local replica; a second unit: determining a common error to all the satellites, correcting the correlation results using the common error, determining, for each possible current position of the vehicle, multi-satellite likelihoods; determining a position and time stamp by comparing the multi-satellite likelihoods.

Systems and methods are provided for improving geolocation services, like GPS, using network device measurements. For example, a plurality of access points (APs) or other network devices may be implemented in a network environment and constructed with a GPS chip. Range measurements can be collected from these network devices and incorporated with the GPS locations using various methods described herein to improve the overall location determination of these devices.

A position, navigation, and timing (PNT) system, a satellite terminal and methods for using the same are disclosed. In some embodiments, the satellite terminal includes: a plurality of receivers operable to receive a plurality of constellation signals having position and navigation information; position and timing systems; and an embedded position, navigation and timing (PNT) system coupled to the position and timing systems, the PNT system operable to receive the constellation signals and provide a transcoder output signal to the position and timing systems.

The invention relates to engineering geodesy for monitoring a height and deformation of a pipeline. The invention includes use of a complex of interrelated monitoring measures that include monitoring a control position of deformation control benchmarks using optic geodetic devices and mobile satellite geodetic receivers. A state geodetic network is used only at an initial stage for reference of the network sites to the local system of coordinates. Geodetic measurements are then converted to a local system of coordinates. The invention decreases an amount of time and labor for detection of the oil pipeline coordinates for operational needs and simplifies a planned high-altitude position data exchange, storage and transfer during measurement.

The system and method facilitates Real-Time-Kinematic (RTK) GNSS with long baseline between a rover receiver and a base station receiver, even in the presence of scintillation or ionospheric disturbances that spatially fluctuate. Residual atmospheric errors can be estimated by a dual error model in a filter to promote efficient fixing or resolution of carrier phase ambiguities.

Provided are a data processing method, apparatus and system. The method is applied to a first electronic device, the first electronic device includes a first processing unit that runs a first operating system and a second processing unit that runs a second operating system, and the working energy consumption of the first processing unit is less than the working energy consumption of the second processing unit. The method includes: the first processing unit executing the selection of a positioning system, and storing selected positioning system information; when it is determined that a first trigger condition for executing the synchronization of the positioning system information is met, synchronizing the stored positioning system information to the second processing unit; and the second processing unit executing positioning-related processing according to the obtained positioning system information.

A client device is operable to receive a navigation signal broadcast by a satellite and generate state data for the client device based on processing the navigation signal. The navigation signal is generated and broadcast by the satellite based on cross-correlating a data stream and a pilot stream in accordance with a bandwidth-efficient modulation scheme. The data stream is generated by the satellite based on navigation data and a data channel spreading sequence. The navigation data is generated by the satellite based on orbital state data generated by the satellite. The pilot stream is generated by the satellite based on a pilot channel spreading sequence.

A sleep control method includes determining a positioning request sent by an application; and determining whether to control a positioning module configured for positioning to enter a sleep state, according to at least a demand positioning frequency of the application. An application may be assigned to a preset application list and associated with a preset positioning frequency to determine the allowed demand positioning frequency of the application. Controlling the positioning module to enter a sleep state may also be performed based on the type of positioning request.

A satellite is operable to generate a navigation message. Encrypted navigation message data is generated from the navigation message by applying an encryption scheme to the navigation message. An encrypted ranging signal is generated by applying the encryption scheme to a spreading code of the satellite. A secure navigation signal is generated based on modulating the encrypted navigation message data upon the encrypted ranging signal. The secure navigation signal is broadcast for receipt by at least one client device. The secure navigation signal facilitates the at least one client device to determine state data of the at least one client device by utilizing key data associated with the encryption scheme.