Abstract: According to one embodiment, a weather radar apparatus includes an antenna apparatus, a signal processing apparatus, a data converter, a forecasting unit, a state determination unit, and radar controller. The antenna apparatus radiates a radar pulse and receives a reflection pulse. The signal processing apparatus calculates a reception intensity, a Doppler speed, and a speed width. The data converter calculates rainfall intensity data and wind direction/speed data. The forecasting unit generates forecasting data based on the rainfall intensity data and on the wind direction/speed data. The state determination unit generates an observation sequence. The radar controller controls the antenna apparatus in accordance with the observation sequence.

Abstract: According to one embodiment, a weather radar apparatus includes an antenna apparatus, a signal processing apparatus, a data converter, a forecasting unit, a state determination unit, and radar controller. The antenna apparatus radiates a radar pulse and receives a reflection pulse. The signal processing apparatus calculates a reception intensity, a Doppler speed, and a speed width. The data converter calculates rainfall intensity data and wind direction/speed data. The forecasting unit generates forecasting data based on the rainfall intensity data and on the wind direction/speed data. The state determination unit generates an observation sequence. The radar controller controls the antenna apparatus in accordance with the observation sequence.

Abstract: According to one embodiment, a radar return signal processing apparatus includes a detector, an estimation unit and an extraction unit. The detector detects an average Doppler frequency, a spectrum width, and a received power of each of echoes, from a radar return signal obtained repeatedly at regular intervals. The estimation unit estimates an optimum mixed density function by learning modeling a shaped of the frequency spectrum by calculating repeatedly a sum of density functions of each of the echoes. The extraction unit extracts information on any one of the echoes included in the radar return signal, from a parameter of the estimated mixed density function.

Abstract: According to one embodiment, a radar return signal processing apparatus includes a detector, an estimation unit and an extraction unit. The detector detects an average Doppler frequency, a spectrum width, and a received power of each of echoes, from a radar return signal obtained repeatedly at regular intervals. The estimation unit estimates an optimum mixed density function by learning modeling a shaped of the frequency spectrum by calculating repeatedly a sum of density functions of each of the echoes. The extraction unit extracts information on any one of the echoes included in the radar return signal, from a parameter of the estimated mixed density function.