A location of a client device may be detected. From a first location, a first angle from a first reference line to the client device may be determined using beamforming. Next, from a second location, a second angle from a second reference line to the client device may be determined using beamforming. The first reference line and the second reference line may be parallel. Then, an intersection point of a first directional line and a second directional line may be determined. The first directional line may be defined by the first location and the first angle. The second directional line may be defined by the second location and the second angle. A client device location corresponding to the intersection point may then be obtained.

There is provided a marine telecommunications network building system to communicate from one of boats navigating on sea to a base station on land with a telecommunications terminal mounted on each of the boats. The telecommunications terminal is configured to build the telecommunication network to establish a communication paths enabling mutual communication between one of the boats exists out of the communication range with the base station and other of the boats that exists within the communication range such that the one of the boats communicates with the base station.

Disclosed are examples of systems, apparatus, methods and computer program products for locating unmanned aerial vehicles (UAVs). A region of airspace may be scanned with two scanning apparatuses. Each scanning apparatus may include one or more directional Radio Frequency (RF) antennae. The two scanning apparatuses may have different locations. Radio frequency signals emitted by a UAV can be received at each of the two scanning apparatuses. The received radio frequency signals can be processed to determine a first location of the UAV.

Disclosed are examples of systems, apparatus, methods and computer program products for locating unmanned aerial vehicles (UAVs). A region of airspace may be scanned with two scanning apparatuses. Each scanning apparatus may include one or more directional Radio Frequency (RF) antennae. The two scanning apparatuses may have different locations. Radio frequency signals emitted by a UAV can be received at each of the two scanning apparatuses. The received radio frequency signals can be processed to determine a first location of the UAV.

An observation satellite is used for obtaining information about electromagnetic energy emitted from the earth. The observation satellite orbits the earth in an orbit having an inclination larger than 90? and smaller than 270?. Further, the observation satellite comprises at least one receiving antenna, the at least one receiving antenna having a receiving pattern directed towards the earth, and suitable for receiving electromagnetic energy in the radio frequency range as the observation satellite is orbiting relative to the surface of the earth. The observation satellite also comprises a transmitter configured for at least one of: (i) retransmitting, to a relay spacecraft, the received electromagnetic energy, (ii) transmitting, to the relay spacecraft, information representing the received electromagnetic energy, and (iii) transmitting, to the relay spacecraft, information derived from the received electromagnetic energy. The invention also relates to systems and methods therefor.

An observation satellite is used for obtaining information about electromagnetic energy emitted from the earth. The observation satellite orbits the earth in an orbit having an inclination larger than 90? and smaller than 270?. Further, the observation satellite comprises at least one receiving antenna, the at least one receiving antenna having a receiving pattern directed towards the earth, and suitable for receiving electromagnetic energy in the radio frequency range as the observation satellite is orbiting relative to the surface of the earth. The observation satellite also comprises a transmitter configured for at least one of: (i) retransmitting, to a relay spacecraft, the received electromagnetic energy, (ii) transmitting, to the relay spacecraft, information representing the received electromagnetic energy, and (iii) transmitting, to the relay spacecraft, information derived from the received electromagnetic energy. The invention also relates to systems and methods therefor.

A method of associating data with a physical location comprises receiving, by at least two receiver antennae, a radiofrequency (RF) signal transmitted by a mobile device, the RF signal conveying data collected by the mobile device from an external source; calculating, for each of the at least two receiver antennae, a phase of the RF signal received by each receiver antennae; calculating, based on the calculated phases, a physical location from where the mobile device transmitted the RF signal; and associating the data conveyed by the RF signal and the external source from which the data were collected with the calculated physical location from where the mobile device transmitted the RF signal.

In an example method of target position estimation, the method includes calculating initial estimated positions of a target transmitter. Each of the initial estimated positions is based on an angle of arrival estimate received from a locator. The method includes generating an error projection associated with each of the initial estimated positions. The error projection is based on azimuth and elevation error characteristics of the locator associated with the initial estimated position. The method includes creating a select group of the locators based on overlaps of the error projections, wherein the select group of locators comprises a subset of the locators. The method includes calculating a refined estimate of the position of the target transmitter based on the initial estimated positions associated with the select group of locators.

In an example method of target position estimation, the method includes calculating initial estimated positions of a target transmitter. Each of the initial estimated positions is based on an angle of arrival estimate received from a locator. The method includes generating an error projection associated with each of the initial estimated positions. The error projection is based on azimuth and elevation error characteristics of the locator associated with the initial estimated position. The method includes creating a select group of the locators based on overlaps of the error projections, wherein the select group of locators comprises a subset of the locators. The method includes calculating a refined estimate of the position of the target transmitter based on the initial estimated positions associated with the select group of locators.

A method is disclosed for determining a relative pose between a primary winding structure and a secondary winding structure of a system for inductive power transfer to a vehicle. The method includes obtaining first output values generated by multiple receiving devices of a first radio direction finding system. The first radio direction finding system further includes a transmitting device. The receiving devices generate the output values in response to receiving a position signal transmitted by the transmitting device. The method includes determining a motion value of the vehicle. The method includes providing the obtained first output values and the motion value as input values to a model. The method includes determining a first relative pose based on the model. The method includes determining the relative pose based on the first relative pose.