To provide a radar device capable of tracking a target accurately and stably, taking into account the possibility that a plurality of echoes may merge. A radar device is provided with a tracking processing unit, a merging possibility calculating unit and a preliminary handling processing unit. The merging possibility calculating unit calculates an echo merging possibility, which is the possibility that echo merging, whereby a plurality of echoes become integrated, will occur in the future, based on movement information including the position and speed of a target. The preliminary handling processing unit performs an advance handling process, which is a process for handling future occurrences of echo merging, based on the echo merging possibility.

A signal processing device and method to accurately detect a distress signal from a search and rescue transponder and reduce a calculation load for the detection. The device may include an instantaneous frequency change rate calculating module configured to calculate a change rate of an instantaneous frequency of a complex reception signal generated from a reception wave received by a wave receiver, a memory configured to store a value obtained based on a reference frequency sweeping speed that is a frequency sweeping speed of the distress signal, and a distress signal determining module configured to determine whether the distress signal is issued from the search and rescue transponder, based on a comparison result between the instantaneous frequency change rate calculated by the instantaneous frequency change rate calculating module and the value obtained based on the reference frequency sweeping speed stored in the memory.

A signal processing device and method to accurately detect a distress signal from a search and rescue transponder and reduce a calculation load for the detection. The device may include an instantaneous frequency change rate calculating module configured to calculate a change rate of an instantaneous frequency of a complex reception signal generated from a reception wave received by a wave receiver, a memory configured to store a value obtained based on a reference frequency sweeping speed that is a frequency sweeping speed of the distress signal, and a distress signal determining module configured to determine whether the distress signal is issued from the search and rescue transponder, based on a comparison result between the instantaneous frequency change rate calculated by the instantaneous frequency change rate calculating module and the value obtained based on the reference frequency sweeping speed stored in the memory.

A non-transitory computer readable recording medium stores therein a program that causes a computer to execute a process including: executing a process of acquiring a position of a terminal; determining whether there is object data registered in a position in an area corresponding to the acquired position by referring to a storage that stores positions in which multiple sets of object data are registered in association with the sets of object data, respectively; and displaying object data on a display when there is the object data registered in a position in the area, and curbing any one of frequency of executing the process of acquiring the position of the terminal and accuracy of the acquiring when there is no object data registered in a position in the area.

A non-transitory computer readable recording medium stores therein a program that causes a computer to execute a process including: executing a process of acquiring a position of a terminal; determining whether there is object data registered in a position in an area corresponding to the acquired position by referring to a storage that stores positions in which multiple sets of object data are registered in association with the sets of object data, respectively; and displaying object data on a display when there is the object data registered in a position in the area, and curbing any one of frequency of executing the process of acquiring the position of the terminal and accuracy of the acquiring when there is no object data registered in a position in the area.

Techniques are disclosed for systems and methods to provide visually correlated radar imagery for mobile structures. A visually correlated radar imagery system includes a radar system, an imaging device, and a logic device configured to communicate with the radar system and imaging device. The radar system is adapted to be mounted to a mobile structure, and the imaging device may include an imager position and/or orientation sensor (IPOS). The logic device is configured to determine a horizontal field of view (FOV) of image data captured by the imaging device and to render radar data that is visually or spatially correlated to the image data based, at least in part, on the determined horizontal FOV. Subsequent user input and/or the sonar data may be used to adjust a steering actuator, a propulsion system thrust, and/or other operational systems of the mobile structure.

A ship vicinity information display device is provided, which is capable of displaying a position etc. of a destination of another ship based on information of the destination obtained from the other ship, in a mode which is intuitively easy to understand. A radar indicator may include a display unit, an AIS interface, and processing circuitry. The display unit may be capable of displaying an image of a situation in the vicinity of one ship. The AIS interface may receive the information of the destination of the other ship. The processing circuitry may acquire a longitude and latitude of the destination based on the destination information of the other ship and graphically display at least one of the position of the destination of the other ship and a direction of the destination from the other ship (other-ship destination symbol), on the display unit.

A ship vicinity information display device is provided, which is capable of displaying a position etc. of a destination of another ship based on information of the destination obtained from the other ship, in a mode which is intuitively easy to understand. A radar indicator may include a display unit, an AIS interface, and processing circuitry. The display unit may be capable of displaying an image of a situation in the vicinity of one ship. The AIS interface may receive the information of the destination of the other ship. The processing circuitry may acquire a longitude and latitude of the destination based on the destination information of the other ship and graphically display at least one of the position of the destination of the other ship and a direction of the destination from the other ship (other-ship destination symbol), on the display unit.

In some examples, a ground obstacle detection system of an aircraft is configured to generate and display a graphical user interface (GUI) that includes a graphical representation of a detected obstacle with which the aircraft may collide during a ground operation and an indication of an area of unknown associated with the detected obstacle. Instead of, in addition to, a GUI that includes an indication of an area of unknown associated with an obstacle, in some examples, a ground obstacle detection system to generate a GUI that includes at least two windows that present different views of an aircraft. At least one of the windows may include a graphical representation of an obstacle that may not be visible in the view of another window.

In some examples, a ground obstacle detection system of an aircraft is configured to generate and display a graphical user interface (GUI) that includes a graphical representation of a detected obstacle with which the aircraft may collide during a ground operation and an indication of an area of unknown associated with the detected obstacle. Instead of, in addition to, a GUI that includes an indication of an area of unknown associated with an obstacle, in some examples, a ground obstacle detection system to generate a GUI that includes at least two windows that present different views of an aircraft. At least one of the windows may include a graphical representation of an obstacle that may not be visible in the view of another window.