A prediction portion predicts states including a water level of the wave at a prediction subject location. In a case in which inputs of the flow velocity in a line-of-sight direction of the wave at each observation location have been received, an estimation portion estimates states of waves including the water level thereof at the prediction subject location. The estimation of the states is based on a difference between the flow velocity in a line-of-sight direction of the wave at each input observation location, and the flow velocity in a line-of-sight direction of the wave at each input observation location obtained by converting states of the wave using an observation matrix. A determination portion causes the predictions of the states and the estimation of the states to be repeated until predetermined conditions have been satisfied.

Provided is a technique for specifying a medium more simply. A medium sensor device includes an antenna, a storage unit that stores a medium identification table in which a medium corresponding to an antenna impedance has been determined beforehand, and a medium specification unit that specifies the impedance of the antenna and specifies a medium in the vicinity of the antenna by referring to the medium identification table.

A wind turbine which is configured to be disposed in or above a sea floor is provided. The wind turbine includes a tower configured to protrude from a sea level and having a transmitter configured to transmit an electromagnetic wave to be reflected on the sea level and a receiver configured to receive the reflected electromagnetic wave, wherein at least one of the transmitter and the receiver includes a leaky feeder; and a processing unit being in communication with the receiver and configured to analyse the reflected electromagnetic wave such that a wave characteristic of the sea level is determined.

A system for the display of radar returns is provided. The system comprises a radar configured to provide radar data, a processor, and a display configured to present the radar data. The system comprises memory including computer program code configured to, when executed, cause the processor to receive the radar data, wherein an object is represented within the radar data; receive additional data from a data source other than the radar; and determine object characteristic(s) of the object using the radar data and additional data, wherein the object characteristic(s) comprises a position, a velocity, an intensity, or an object classification of one or more objects. The computer program code is also configured to cause the processor to cause presentation of the radar data including a representation of the object and an indication of the corresponding object characteristic(s). A marine electronic device and a non-transitory computer readable medium are also provided.

It is prevented that a communication relay apparatus in an upper airspace, which is suitable for constructing a three-dimensional network, falls by a strong wind. A communication relay apparatus is provided with a relay communication station that performs a radio communication with a terminal apparatus, and is capable of flying in an upper airspace by an autonomous control or an external control. This communication relay apparatus includes a flight control section that controls a flight of the communication relay apparatus based on flight control information determined so as to reduce an influence of a strong wind generated around the communication relay apparatus. The flight control information may include information for controlling at least one of a flight direction, velocity, altitude, attitude, flight route and flight pattern of the communication relay apparatus.

The technology relates to determining general weather conditions affecting the roadway around a vehicle, and how such conditions may impact driving and route planning for the vehicle when operating in an autonomous mode. For instance, the on-board sensor system may detect whether the road is generally icy as opposed to a small ice patch on a specific portion of the road surface. The system may also evaluate specific driving actions taken by the vehicle and/or other nearby vehicles. Based on such information, the vehicle's control system is able to use the resultant information to select an appropriate braking level or braking strategy. As a result, the system can detect and respond to different levels of adverse weather conditions. The on-board computer system may share road condition information with nearby vehicles and with remote assistance, so that it may be employed with broader fleet planning operations.

A communication system uses skywave propagation to transmit data between communication nodes over a data transmission path. An atmospheric sensor is configured to collect atmospheric data at the reflection point of the data transmission path where the transmission path is redirected from the atmosphere toward the surface of the Earth. Data collected by the atmospheric sensor may be used to predict future ionospheric conditions and determine optimum working frequencies for transmission of data between the communication nodes.

The solid-state radar device includes: a transmission/reception unit configured to transmitting and receiving radio wave signals comprising a modulated signal and a non-modulated signal, which are pulse signals whose frequencies are different from each other; a frequency filter unit configured respectively to extract the modulated signal and the non-modulated signal from the received radio wave signals based on the frequencies; a pulse compression unit generating a pulse-compressed signal by pulse-compressing the modulated signal; a first echo image generation unit configured to generate a first echo image based on the non-modulated signal and the pulse-compressed signal; a wave analysis unit configured to analyze ocean wave information based on one of the non-modulated signal and the pulse-compressed signal; and a display signal generation unit configured to generate a display signal comprising the first echo image and/or the ocean wave information.

A method of monitoring and verifying weather information using a weather condition detection system of a vehicle is provided. The method includes receiving weather information by a computing device within the vehicle. The weather information is verified locally at the vehicle using the computing device. Verifying the weather information includes optically verifying the weather information using a vehicle video system of the vehicle comprising a camera.

This disclosure is directed to techniques for aggregating marine weather radar data and sea state sensor data from ships or other sea-based data collecting nodes, potentially also with non-sea-based data collecting nodes. In one example, a system is configured to receive, via a remote coverage broadband datalink system, one or more sets of marine environmental condition data from one or more sea-based data collecting nodes. The system is further configured to aggregate the one or more sets of marine environmental condition data from the one or more sea-based data collecting nodes into one or more aggregated sets of marine environmental condition data. The system is further configured to output at least one of the aggregated sets of marine environmental condition data to one or more recipient systems.