Abstract: An evaluation apparatus according to the present disclosure includes at least one memory storing a set of instructions, and at least one processor configured to execute the set of instructions and thereby to acquire, from a sensor, time-space data on vibrations that have occurred in an overhead optical fiber strung between poles, and evaluate, for each of predetermined analysis sections, a wind velocity and a propagation speed of wind in the analysis section based on the time-space data, and evaluate a wind direction in the analysis section based on the evaluated wind velocity and the propagation speed of the wind.

Abstract: A signal processing apparatus according to the present disclosure includes: at least one memory configured to store instructions; and at least one processor configured to execute the instructions to: acquire signals measured by a signal measurement apparatus at a plurality of points located along an optical fiber; and determine whether there is an event based on a degree of similarity between the signals measured at points adjacent points.

Abstract: An apparatus includes memory and processor configured to: input, from a sensor, a signal indicating a characteristic vibration occurring at each position of an optical fiber, and estimate, based on the input signal, an aerial section in which the optical fiber being aerially laid over a pole is present; calculate, based on the input signal, sensing data indicating a vibration characteristic of each position of the optical fiber being present in the aerial section, and calculate a difference degree of the sensing data between two neighboring points of the optical fiber; and temporally integrate the difference degree, calculate a time average of the difference degree, estimate, based on a time average value of the difference degree, a position of the pole and a position of an extra length section of the optical fiber, and output an estimation result of positions of the pole and the extra length section.