Systems, devices, methods, and computer-readable media for improved location determination of an orbiting device. A method can include receiving, at a transceiver of a device, measurement data from a monitor device, the measurement data representative of a physical state of a mobile object, filtering, using a first of a plurality of first filters of the device, the measurement data based on a character parameter of a state transition matrix representative of the physical state resulting in filtered measurement data, filtering, using a Kalman filter, the filtered measurement data resulting in further filtered measurement data, and providing, by the transceiver, the further filtered measurement data.

A system for aiding water vessels needing towing. The system may comprise one or more storage machines holding instructions executable by one or more logic machines to actualize the operations of, determining an assistance requester's GPS location, determining an assistance provider's GPS location, and displaying the assistance provider's GPS location to the assistance requester. Displaying the assistance provider's GPS location to the assistance requester may include displaying a distance between the assistance requester and the assistance provider. Displaying the assistance provider's GPS location to the assistance requester may include displaying a service cost for the assistance provider's service. The assistance requester and assistance provider may be independent vessels.

A system for aiding water vessels needing towing. The system may comprise one or more storage machines holding instructions executable by one or more logic machines to actualize the operations of, determining an assistance requester's GPS location, determining an assistance provider's GPS location, and displaying the assistance provider's GPS location to the assistance requester. Displaying the assistance provider's GPS location to the assistance requester may include displaying a distance between the assistance requester and the assistance provider. Displaying the assistance provider's GPS location to the assistance requester may include displaying a service cost for the assistance provider's service. The assistance requester and assistance provider may be independent vessels.

The present application relates to devices and components including apparatus, systems, and methods for ephemeris signaling in wireless networks.

A system is for determining a position on a golf course. The system has a master unit and at least one slave unit. The master unit and the at least one slave unit are adapted to communicate through a telecommunications network. The master unit comprises a receiver for a satellite navigation system, the receiver being operable at a fixed position on the golf course. The master unit is configured to: obtain a position determined by the receiver; process the displacement between the obtained position and the fixed position; and make the processed displacement available to the at least one slave unit through the telecommunications network. A slave unit then makes use of the processed displacement to improve positions determined by itself.

Embodiments of the present disclosure provide a method for calibrating a lawnmower, including: collecting a preset number of position data of the lawnmower moving relative to a charging station; performing straight line fitting using the preset number of position data; and determining, if the preset number of position data fits a straight line, an orientation of the charging station based on a slope of the fitted straight line. Accordingly, embodiments of the present disclosure may accurately determine the orientation of the charging station and has the advantages of high calibration accuracy and low calibration cost.

A method for estimating a location of a terminal device of a non-terrestrial cellular data communication network is disclosed. The non-terrestrial cellular data communication network includes at least one airborne or spaceborne base station moving along a flight trajectory. The terminal device and a location service node store information describing the flight trajectory of the at least one airborne or spaceborne base station. The method further includes: at the at least one airborne or spaceborne base station, transmitting a reference timing signal; at the terminal device, accumulating over time the respective arrival times of the reference timing signal received from at least three different positions taken by the at least one airborne or spaceborne base station; and at the terminal device, computing, from said arrival times, at least two arrival time differences with respect to one reference arrival time.

A mobile device is disclosed. The mobile device may receive one or more wireless local area network (WLAN) signals. The mobile device may determine Channel State Information (CSI) data from the one or more WLAN signals. The mobile device may determine one or more environmental characteristics associated with an environment of the mobile device based on the CSI data. The mobile device may send information indicative of the one or more environmental characteristics to a location server (LS), or determine a position of the mobile device based at least in part on the one or more environmental characteristics, or any combination thereof.

A method of measuring a distance to a satellite, which is performed by an electronic device, according to an exemplary embodiment of the present invention, the method comprises receiving a linearly polarized photon from and angular momentum per unit mass of the satellite the satellite; measuring an amount of rotation of the polarized photon, the rotation being induced by a space-time warpage due to gravity; and calculating a distance to the satellite by using the rotation amount of the polarized photon and the angular momentum per unit mass of the satellite. The distance to the satellite may be calculated by the following equation, $\sin \Theta \left(r\right)\cong -\frac{l_{\mathrm{obs}}}{\sqrt{{\mathrm{rr}}_s}}\sqrt{1-\frac{r_s}{r}},$
wherein ‘2Θ’ is the rotation amount of polarized photon, ‘l.sub.obs’ is the angular momentum per unit mass of the satellite, ‘r’ is the distance to the satellite, and ‘r.sub.s’ is the Schwarzschild radius of the Earth.

A method of measuring a distance to a satellite, which is performed by an electronic device, according to an exemplary embodiment of the present invention, the method comprises receiving a linearly polarized photon from and angular momentum per unit mass of the satellite the satellite; measuring an amount of rotation of the polarized photon, the rotation being induced by a space-time warpage due to gravity; and calculating a distance to the satellite by using the rotation amount of the polarized photon and the angular momentum per unit mass of the satellite. The distance to the satellite may be calculated by the following equation, $\sin \Theta \left(r\right)\cong -\frac{l_{\mathrm{obs}}}{\sqrt{{\mathrm{rr}}_s}}\sqrt{1-\frac{r_s}{r}},$
wherein ‘2Θ’ is the rotation amount of polarized photon, ‘l.sub.obs’ is the angular momentum per unit mass of the satellite, ‘r’ is the distance to the satellite, and ‘r.sub.s’ is the Schwarzschild radius of the Earth.