RADAR DEVICE, OBSERVATION METHOD, AND PROGRAM

• Main Authors: KAWABATA KAZUAKI, GOMI KOICHIRO, HIURA SHIGERU, AOKI TOMOMI
• Format: Patent
• Language: English; Japanese
• Published: 21.09.2017
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

PROBLEM TO BE SOLVED: To provide a weather radar device that reduces an estimation error generated by oversampling.SOLUTION: A radar device according to one embodiment of the present invention comprises: an oversampling unit for acquiring a sampling signal by oversampling a received signal; a weight vector calculation unit for calculating a weight vector on the basis of the sampling signal and a waveform information matrix; a weather parameter calculation unit for calculating the estimated value of a weather parameter of an observation target on the basis of the weight vector and the waveform information matrix; a degree of error effect calculation unit for selecting a first observation target according to an estimation error included in the estimated value of the weather parameter or the degree of an error effect based on the estimation error; and an error reduction unit for subtracting an estimation error that the first observation target gives to the estimated value of weather parameter of a second observation target from the estimated value of weather parameter of the second observation target.SELECTED DRAWING: Figure 1 【課題】オーバサンプリングにより生じる推定誤差を低減させる気象レーダ装置を提供する。【解決手段】本発明の一実施形態に係るレーダ装置は、受信信号をオーバサンプリングすることにより、サンプリング信号を取得するオーバサンプリング部と、前記サンプリング信号と、波形情報行列とに基づき、ウェイトベクトルを算出するウェイトベクトル算出部と、前記ウェイトベクトルと、前記波形情報行列とに基づき、観測標的の気象パラメータの推定値を算出する気象パラメータ算出部と、前記気象パラメータの推定値に含まれる推定誤差または前記推定誤差に基づく誤差影響度により、第１の観測標的を選択する誤差影響度算出部と、前記第１の観測標的が第２の観測標的の気象パラメータの推定値に与える推定誤差を、前記第２の観測標的の気象パラメータの推定値から減算する誤差低減部と、を備える。【選択図】図１