The present invention relates to a multimodal sensing positioning system orientated to a high-risk production environment, the positioning system comprising: at least one positioning terminal, configured to be worn by a to-be-positioned subject and use at least one positioning technique to conduct multimodal sensing positioning so as to identify a current location information of the subject in the high-risk production environment; and a monitoring terminal, communicating with the positioning terminal so as to remotely monitor the current location of the subject. The present invention improves positioning precision while ensuring realtimeness of multimodal positioning.

This invention describes a Spatial Intelligence System that provide radio positioning/navigation with additional spatial data in support of automation, machine learning and inference-based systems. More specifically and in particular, the present invention, is such a radio positioning/navigation system that integrates, correlates with or obviates the need of the global navigation satellite systems (GNSS) with a Pulsed Wireless Location System (PWLS) to provide positioning/navigation/timing data either within a line-of-sight barrier using an ad-hoc coordinate system, a direct line of sight of GNSS beacon geographic coordinate system or a ad-hoc translation to geographic coordinate system. The system generically offers the ability to use a low cost tag or location device with anchor processing or a higher cost, higher capability tag or location device with local processing simultaneously.

The present disclosure relates generally to satellite communication systems, and, more particularly, to trilateration-based satellite location accuracy for improved satellite-based geolocation are provided. In one embodiment, a method comprises: determining, by a processing device, a location of each of a plurality of reference antennas with known locations; obtaining a plurality of distances between a communication satellite and the plurality of reference antennas, each distance of the plurality of distances corresponding to a respective reference antenna of the plurality of reference antennas, at least one distance of the plurality of distances based on an echo message communicated between a particular reference antenna of the plurality of reference antennas and the communication satellite; determining an accurate location of the communication satellite based on trilateration of the plurality of distances from the known locations of the plurality of reference antennas; and utilizing the accurate location of the communication satellite.

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.

A system and method for determining the location of a vehicle when GNSS signals are not available use triangulation between one or two radio transmitters and, respectively, two or one radio receivers mounted on the vehicle. The distance between each radio transmitter and/or each radio receiver can be determined according a phase difference between received radio signals. The radio signals can have the geographical location of the radio transmitter included therein. Utilizing the demodulated geographical location of each radio transmitter and the distance between the radio transmitter and each radio receiver, triangulation can be used to determine the geographical location of the vehicle.

A low-power-consumption positioning method includes an electronic device sending first setting information to a server, where the first setting information is used to indicate the server to broadcast positioning assistance data to the electronic device at a first time interval (for example, 1 second). The electronic device resolves high-precision positioning information based on the positioning assistance data. When the electronic device meets a first preset condition, the electronic device may send second setting information to the server. The second setting information instructs the server to broadcast the positioning assistance data to the electronic device at a second time interval (for example, 60 seconds). The first time interval is shorter than the second time interval.

This application relates to an apparatus for generating a global navigation satellite system (GNSS) signal. In one aspect, the apparatus includes a receiver configured to receive and store GNSS navigation information, receive a real-time satellite signal, and calculate a frequency shift value of the real-time satellite signal with respect to a default carrier frequency based on the real-time satellite signal. The apparatus may also include at least one signal generator configured to receive the GNSS navigation information from the receiver, and generate pseudo GNSS signal information corresponding to a current time and a current location based on the GNSS navigation information and the frequency shift value. The apparatus may further include a transmitter configured to generate a pseudo GNSS signal based on the pseudo GNSS signal information, and amplify and output the pseudo GNSS signal, wherein the GNSS navigation information indicates an estimated location of a GNSS satellite over time.

Satellite echoing for geolocation and mitigation of Global Navigation Satellite System (GNSS) denial are provided herein, where an example method comprises: transmitting an initiated message to a communication satellite along a communication path that has a target device with an unknown distance to the communication satellite; receiving a returned message from the communication satellite over the communication path in response to the initiated message; determining a local time difference between the transmission time and the reception time; calculating a distance between the communication satellite and the target device, the distance calculated based on a portion of the determined time difference associated with only a single traversal of a portion of the communication path that is between the communication satellite and the target device; and performing one or more actions based on the distance between the communication satellite and the target device.

A calibration of an unmanned aerial vehicle is performed without the use of a magnetometer. The unmanned aerial vehicle generates a first acceleration vector in a navigation frame of reference and a second acceleration vector in a GPS frame of reference. The unmanned aerial vehicle estimates a heading of the unmanned aerial vehicle based on the first acceleration vector and the second acceleration vector. The unmanned aerial vehicle performs a calibration based on the estimated heading of the unmanned aerial vehicle.

In a position correction information delivery system using a positioning scheme in which a receiver and a reference station measure a phase of a carrier wave from a satellite and position information of the receiver is obtained in real time based on position correction information transmitted from the reference station, the receiver transmits a request for position correction information to a first base station managing a cell that the receiver camps on, on reception of the request from the receiver, the first base station selects a nearby second base station having a reference station or a nearby reference station from those registered in a database, receives the position correction information from the selected second base station or reference station, and broadcasts the position correction information to the cell.