A positioning, navigation and timing solutions for a ground-based device is determined by receiving a satellite RF signal at the ground-based device. It is determined whether the RF signal is from a satellite of interest. A satellite of interest has known data, enabling an estimation of a current location of the satellite. The RF signal frequency of the satellite of interest is used to collect observed Doppler measurements and time of receipt of the RF signal. The position, navigation and timing solution is determined as a function of the observed Doppler measurements, known data regarding the characteristics of the satellite, and predicted Doppler measurements to enable an estimation of the current location of the receiver.

The present invention sequentially and repeatedly accepts a plurality of types of information that can change with time, including position information obtained using a satellite signal, and correlates and records the accepted plurality of types of information with time information.

The present invention sequentially and repeatedly accepts a plurality of types of information that can change with time, including position information obtained using a satellite signal, and correlates and records the accepted plurality of types of information with time information.

User equipment (UE) access to a non-terrestrial network (NTN) via a satellite to a Fifth Generation (5G) public land mobile network (PLMN) is supported using fixed tracking areas (TAs) and fixed cells. The fixed TAs and fixed cells are defined in the NTN independently of NTN radio cells. Network elements in the NTN are provided with configuration information for the fixed TAs and fixed cells from a server (e.g., an Operations and Maintenance (O&M) server). The configuration information includes location related information for the fixed TAs and fixed cells, which may not be standardized. The network entities perform one or more services for the UE based on the location related information for the fixed TAs and fixed cells, such as determining a fixed TA or fixed serving cell for a UE, locating the UE, routing emergency calls, and supporting wireless emergency alerting (WEA).

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 positioning method in a satellite network, a communication apparatus, a computer-readable storage medium, a program, and a program product are provided. The method includes: a terminal device receives a first broadcast signal block of a first satellite; obtains a measurement value of the first broadcast signal block; obtains positioning assistance information, from the first satellite, indicating a frequency and a polarization direction of the second satellite, where a frequency and/or a polarization direction of the first satellite are/is different from the frequency and the polarization direction of the second satellite; receives a second broadcast signal block of the second satellite based on the positioning assistance information; obtains a measurement value of the second broadcast signal block; and obtains location information of the terminal device based on the measurement value of the first broadcast signal block and the measurement value of the second broadcast signal block.

A system and method for transient satellite doppler signal position determination by receiving multiple measured signals, determining transmission characteristics for those signals, determining orbital characteristics of satellites associated with those signals via a Doppler calculation, identifying the satellites from the transmission and orbital characteristics, determining a closest approach point responsive to identifying the satellites and the Doppler calculations, determining current positions of the satellites relative to the receiver from the closest approach point determinations via comparison to an orbital location-defining modeling equation associated with the first satellite, and determining a geolocation of the receiver responsive to each of the current position of the satellites relative to the receiver.

According to one or more embodiments herein, interferometry-based satellite location accuracy is provided. In one embodiment, a method comprises: determining, generally at a substantially given time, a reference satellite having a known accurate location within angular proximity of a communication satellite having a known general location; determining an accurate angular position of the communication satellite with relation to the reference satellite from the perspective of at least one ground station antenna of a known accurate location; determining an additional location reference measurement of the communication satellite; determining an accurate location of the communication satellite at the substantially given time based at least in part on the accurate angular position of the communication satellite with relation to the reference satellite from the perspective of the at least one ground station antenna and the additional location reference measurement of the communication satellite; and utilizing the accurate location of the communication satellite.

The present invention sequentially and repeatedly accepts a plurality of types of information that can change with time, including position information obtained using a satellite signal, and correlates and records the accepted plurality of types of information with time information.

The present invention sequentially and repeatedly accepts a plurality of types of information that can change with time, including position information obtained using a satellite signal, and correlates and records the accepted plurality of types of information with time information.