JP2002031683A - Wind distribution observation device - Google Patents
Wind distribution observation deviceInfo
- Publication number
- JP2002031683A JP2002031683A JP2000215026A JP2000215026A JP2002031683A JP 2002031683 A JP2002031683 A JP 2002031683A JP 2000215026 A JP2000215026 A JP 2000215026A JP 2000215026 A JP2000215026 A JP 2000215026A JP 2002031683 A JP2002031683 A JP 2002031683A
- Authority
- JP
- Japan
- Prior art keywords
- wind
- wind distribution
- observation
- beam direction
- cloud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電磁波の反射波か
ら風向・風速等を算出する気象観測機器に属する風分布
観測装置に関する発明である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind distribution observation device belonging to a meteorological observation device for calculating a wind direction and a wind speed from a reflected wave of an electromagnetic wave.
【０００２】[0002]
【従来の技術】現在、風分布を直接観測できる気象観測
装置としては、ウインドプロファイラや境界層レーダ等
がある。これらの風分布観測装置は、パルス波を放射し
てブラッグ散乱による微弱なエコー成分を抽出し、この
エコー成分から高度別に風向・風速を算出し、その分布
を表示出力するものである。2. Description of the Related Art At present, wind profilers, boundary layer radars, and the like are available as weather observation devices capable of directly observing a wind distribution. These wind distribution observing devices emit a pulse wave to extract a weak echo component due to Bragg scattering, calculate a wind direction and a wind speed for each altitude from the echo component, and display and output the distribution.
【０００３】ところで、ウインドプロファイラではＵＨ
Ｆ帯、境界層レーダではＬ帯の電磁波を用いている。こ
のため、それぞれで使用する空中線は非常に巨大なもの
となっており、任意の方向に高い指向性で空中線を指向
させるのは極めて困難である。したがって、現状のウイ
ンドプロファイラ及び境界層レーダでは、空中線によっ
て形成されるビーム指向方向を天頂方向に代表される一
方向に固定せざるを得ず、空中線の設置個所一方向（上
空等）の風分布しか直接観測することができなかった。[0003] By the way, in wind profilers, UH
The F band and the boundary layer radar use electromagnetic waves in the L band. For this reason, the aerial used in each case is very huge, and it is extremely difficult to direct the aerial in any direction with high directivity. Therefore, in the current wind profiler and boundary layer radar, the beam direction formed by the aerial must be fixed in one direction represented by the zenith direction, and the wind distribution in one direction (such as the sky) where the aerial is installed is required. Only direct observations were possible.
【０００４】また、従来のウインドプロファイラや境界
層レーダでは、ビーム指向方向に雨や雪があると、その
雨や雪の落下速度成分が風向・風速成分として誤観測さ
れていた。[0004] In a conventional wind profiler or boundary layer radar, when there is rain or snow in the beam direction, the falling velocity component of the rain or snow is erroneously observed as a wind direction / wind speed component.
【０００５】[0005]
【発明が解決しようとする課題】以上述べたように、従
来のウインドプロファイラや境界層レーダによる風分布
観測装置では、空中線の設置個所一方向以外の、任意の
方向の風分布を直接観測することができなかった。ま
た、ビーム指向方向の雲や雨の有無が特定することがで
きなかったため、ビーム指向方向に雨や雪があると、そ
の雨や雪の落下速度成分が風向・風速成分として誤観測
されていた。As described above, the conventional wind profiler and boundary layer radar-based wind distribution observing apparatus directly observe the wind distribution in any direction other than one direction where the antenna is installed. Could not. Further, since it was not possible to specify the presence or absence of clouds or rain in the beam direction, if there was rain or snow in the beam direction, the rain or snow falling velocity component was erroneously observed as a wind direction / wind speed component.
【０００６】本発明は、上記の問題を解決するためにな
されたもので、任意の方向に対する風分布を直接観測す
ることができ、さらには、ビーム指向方向の雲、雨の有
無を特定することのできる風分布観測装置を提供するこ
とを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to directly observe a wind distribution in an arbitrary direction, and further to specify the presence or absence of clouds and rain in the beam direction. It is an object of the present invention to provide a wind distribution observation device capable of performing the following.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明に係る風分布観測装置は、以下のような特徴的
構成を有する。Means for Solving the Problems To achieve the above object, a wind distribution observation device according to the present invention has the following characteristic configuration.
【０００８】（１）ビーム方向を制御可能な空中線部を
用いてビームを指定方向に形成し、パルスビームを放射
してその反射波を受信し、この受信信号からブラッグ散
乱によるエコー成分を観測し、この観測結果から指定方
向の風分布を算出することを特徴とする。(1) A beam is formed in a designated direction using an antenna part whose beam direction can be controlled, a pulse beam is emitted and its reflected wave is received, and an echo component due to Bragg scattering is observed from the received signal. It is characterized in that a wind distribution in a specified direction is calculated from the observation result.
【０００９】この構成により、任意の方向の風分布を取
得可能となる。With this configuration, it is possible to obtain a wind distribution in an arbitrary direction.
【００１０】（２）（１）の構成において、前記ビーム
方向を時分割で複数方向に指向させて複数方向の風分布
を連続的に算出することを特徴とする。(2) In the configuration of (1), the beam direction is directed in a plurality of directions in a time-division manner, and wind distributions in a plurality of directions are continuously calculated.
【００１１】この構成により、複数方向の風分布を得た
い場合に対応可能となる。With this configuration, it is possible to cope with a case where it is desired to obtain a wind distribution in a plurality of directions.
【００１２】（３）（１）の構成において、前記ビーム
指向方向の受信強度からその方向の降雨・雲の有無を判
別することを特徴とする。(3) In the configuration of (1), it is characterized in that the presence or absence of rainfall / cloud in the beam direction is determined from the reception intensity in the beam direction.
【００１３】この構成により、本装置単独でビーム方向
の降雨・雲の有無を判別することが可能となる。With this configuration, it is possible to determine the presence / absence of rainfall / cloud in the beam direction by the present apparatus alone.
【００１４】（４）（３）の構成において、前記降雨・
雲の有無判別で降雨・雲無しと判定された場合に、前記
受信信号についてブラッグ散乱によるエコー観測を行っ
て風速情報を算出することを特徴とする。(4) In the configuration of (3), the rainfall
When it is determined that there is no rainfall and no cloud in the presence or absence of the cloud, wind speed information is calculated by performing echo observation by Bragg scattering on the received signal.
【００１５】[0015]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態を詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１６】ここで、本発明による風分布観測装置にお
いては、現状のウインドプロファイラで用いられている
ＵＨＦ帯あるいは境界層レーダで用いられているＬ帯よ
りも高い帯域の周波数を使用することで、小型で高指向
性を有する空中線を使用可能とする。そして、この空中
線によって形成されるビームを任意の方向に指向させ、
その方向のブラッグ散乱による反射波から乱流域を特定
し、その乱流域の移動から風向・風速を算出する機能と
組み合わせることで、あらゆる方向に対する風分布を可
能にする。Here, the wind distribution observation device according to the present invention uses a frequency in a band higher than the UHF band used in the current wind profiler or the L band used in the boundary layer radar, A small and highly directional antenna can be used. And direct the beam formed by this antenna in any direction,
By specifying a turbulence region from the reflected wave due to Bragg scattering in that direction and combining it with the function of calculating the wind direction and speed from the movement of the turbulence region, wind distribution in all directions is possible.
【００１７】図１は本発明に係る風分布観測装置の全体
構成を示すブロック図である。図１において、ビーム方
向指定入力部１１は、運用者が空中線部１２のビーム指
向方向をアジマス角（方位角）及びエレベーション角
（仰角）により指定するための入力機能を有するもの
で、入力されたアジマス角及びエレベーション角の指向
制御情報は空中線制御部１３及び風分布算出部１８へそ
れぞれ出力される。FIG. 1 is a block diagram showing the overall configuration of the wind distribution observation device according to the present invention. In FIG. 1, a beam direction designation input unit 11 has an input function for an operator to designate a beam directing direction of the antenna unit 12 by an azimuth angle (azimuth angle) and an elevation angle (elevation angle). The direction control information of the azimuth angle and the elevation angle is output to the antenna control unit 13 and the wind distribution calculation unit 18, respectively.
【００１８】空中線部１２は、空間の任意の方向へビー
ムを形成することが可能なもので、送受信切替部１４か
ら入力した送信パルス信号をビーム方向へ電波として送
信すると共に、その反射波を受信し、その受信信号を送
受信切替部１４へ出力する機能を有する。The antenna unit 12 is capable of forming a beam in an arbitrary direction in space. The antenna unit 12 transmits a transmission pulse signal input from the transmission / reception switching unit 14 as a radio wave in the beam direction and receives a reflected wave thereof. And has a function of outputting the received signal to the transmission / reception switching unit 14.
【００１９】空中線制御部１３は、上記空中線部１２に
対し、ビーム方向指定入力部１１から入力されたアジマ
ス角及びエレベーション角の方向にビーム方向を指向さ
せる機能を有する。The antenna control unit 13 has a function of directing the beam direction to the antenna unit 12 in the directions of the azimuth angle and the elevation angle input from the beam direction designation input unit 11.
【００２０】送受信切替部１４は、送信部１５からの送
信パルス信号を空中線部１２へ出力し、空中線部１２か
らの受信信号を受信部１６へ出力するための信号切替を
行う機能を有する。The transmission / reception switching unit 14 has a function of outputting a transmission pulse signal from the transmission unit 15 to the antenna unit 12 and performing signal switching for outputting a reception signal from the antenna unit 12 to the reception unit 16.
【００２１】送信部１５は、観測距離に応じた周期で繰
り返し送信パルス信号を発生し、送受信切替部１４へ出
力すると共に、パルス送信タイミングを示すトリガ信号
を生成して受信部１６へ出力する機能を有する。The transmitting unit 15 generates a transmission pulse signal repeatedly at a period corresponding to the observation distance, outputs the signal to the transmission / reception switching unit 14, generates a trigger signal indicating the pulse transmission timing, and outputs the signal to the receiving unit 16. Having.
【００２２】受信部１６は、送信部１５からのトリガ信
号の間隔で送受信切替部１４からの受信信号を取り込
み、この受信信号に対して周波数変換、増幅等の処理を
行った後、信号処理部１７へ出力する機能を有する。The receiving section 16 takes in the received signal from the transmission / reception switching section 14 at intervals of the trigger signal from the transmitting section 15 and performs processing such as frequency conversion and amplification on the received signal. 17 is provided.
【００２３】信号処理部１７は、受信部１６から入力し
た信号に対して、各種信号処理（ＦＦＴ処理、周波数ス
ペクトル積算処理、強度算出処理、速度算出処理等）を
行って速度成分（風速情報）を抽出した後、風分布算出
部１８へ出力する機能を有する。The signal processing unit 17 performs various kinds of signal processing (FFT processing, frequency spectrum integration processing, intensity calculation processing, speed calculation processing, etc.) on the signal input from the reception unit 16 to obtain a speed component (wind speed information). Is extracted and output to the wind distribution calculation unit 18.
【００２４】風分布算出部１８は、信号処理部１７から
入力した速度成分（風速情報）とビーム方向指定入力部
１１から入力した空中線部１２のビーム指向方向（アジ
マス角、エレベーション角）からビーム方向の風分布を
算出した後、表示部１９へ出力する。The wind distribution calculating unit 18 calculates a beam based on the velocity component (wind speed information) input from the signal processing unit 17 and the beam directing direction (azimuth angle, elevation angle) of the antenna unit 12 input from the beam direction designation input unit 11. After calculating the wind distribution in the direction, it is output to the display unit 19.
【００２５】表示部１９は、風分布算出部１８から入力
した風分布情報を基に、例えば航空機の離着陸経路や飛
行物体の飛行経路近傍の風向・風速情報等を画面上に表
示する機能を有する。The display unit 19 has a function of displaying on the screen, for example, wind direction and wind speed information in the vicinity of a take-off and landing route of an aircraft or a flight route of a flying object based on the wind distribution information input from the wind distribution calculation unit 18. .
【００２６】上記構成による風分布観測装置において、
以下、従来のウインドプロファイラや境界層レーダと比
較しながら、その具体的な処理動作を説明する。In the wind distribution observation device having the above configuration,
Hereinafter, a specific processing operation will be described in comparison with a conventional wind profiler and a boundary layer radar.
【００２７】まず、従来のウインドプロファイラや境界
層レーダでは、図２に示すパターンでビーム走査を行っ
ている。すなわち、まずビーム方向を天頂（方位角０
°、仰角９０°）に向けて乱流観測を行い、次に天頂か
らわずかに北方向（方位角０°、仰角（９０−α）°）
にふって乱流観測を行い、次に天頂からわずかに東方向
（方位角＋９０°、仰角（９０−α）°）にふって乱流
観測を行い、以上３方向それぞれの相対関係から天頂方
向における高度別風分布を得る。そして、このような処
理を周期的に繰り返し、統計的な風分布を得ている。First, in a conventional wind profiler or boundary layer radar, beam scanning is performed in the pattern shown in FIG. That is, first, the beam direction is set to the zenith (azimuth 0
Turbulence observation toward the zenith, then slightly northward from the zenith (azimuth 0 °, elevation (90-α) °)
Observe turbulence, and then observe turbulence slightly eastward from the zenith (azimuth + 90 °, elevation (90-α) °). Obtains the wind distribution by altitude at. Then, such processing is periodically repeated to obtain a statistical wind distribution.
【００２８】これに対し、本装置においては、空中線制
御部１３により、図３に示すように、ビーム方向指定入
力部１１から指定されたアジマス角及びエレベーション
角の方向にビームを形成する。図３の例では、アジマス
角＋４５°及びエレベーション角３０°の指定入力（乱
流観測１）と、アジマス角−１３５°及びエレベーショ
ン角６０°の指定入力（乱流観測２）があった場合を示
している。各指定入力に対し、空中線制御部１３では、
指定方向にビームを指向させて乱流観測を行い、同一方
位角で仰角方向にわずかにふって乱流観測を行い、その
仰角を維持して指定方位角から＋９０°回転させて乱流
観測を行い、以上３方向それぞれの乱流観測結果を信号
処理部１７に入力する。On the other hand, in the present apparatus, the antenna control unit 13 forms a beam in the directions of the azimuth angle and the elevation angle designated by the beam direction designation input unit 11, as shown in FIG. In the example of FIG. 3, there are a designated input of azimuth angle + 45 ° and elevation angle 30 ° (turbulence observation 1), and a designated input of azimuth angle -135 ° and elevation angle 60 ° (turbulent flow observation 2). Shows the case. For each designated input, the antenna control unit 13
Observe turbulence by directing the beam in the specified direction, observe turbulence by slightly elevating at the same azimuth angle, and maintain the elevation angle and rotate the specified azimuth by + 90 ° to observe turbulence. Then, the turbulence observation results in the three directions are input to the signal processing unit 17.
【００２９】信号処理部１７では、図４に示すように、
上記３方向それぞれの受信信号をＦＦＴ（高速フーリエ
変換）処理（Ｓ１）して時間領域の信号から周波数領域
の信号に変換し、周波数スペクトル積算処理（Ｓ２）を
行った後、速度算出処理（Ｓ３）を行う。In the signal processing unit 17, as shown in FIG.
FFT (Fast Fourier Transform) processing (S1) is performed on the received signal in each of the three directions to convert a signal in the time domain into a signal in the frequency domain, and a frequency spectrum integration processing (S2) is performed. )I do.
【００３０】一方、図３中に示すように、初回の指定方
向における乱流観測結果から降雨・雲有無判定（Ｓ４）
を行う。この判定は、ビーム指向方向に降雨・雲が存在
すれば、比較的大きなエコー成分が現れることを利用し
て、受信強度がある一定値を越えたことを検出すること
で、降雨・雲の存在を識別する。この降雨・雲有無判定
により、降雨・雲が無い時は速度算出処理（Ｓ３）によ
り速度成分を抽出する。このようにして抽出された速度
成分は風速情報となる。On the other hand, as shown in FIG. 3, the presence / absence of rainfall / cloud presence is determined from the first turbulence observation result in the designated direction (S4).
I do. This determination is based on the fact that if there is rainfall / cloud in the beam direction, a relatively large echo component appears, and it is detected that the reception intensity has exceeded a certain value. Identify. As a result of the rain / cloud presence / absence judgment, when there is no rain / cloud, a speed component is extracted by a speed calculation process (S3). The speed component extracted in this manner becomes wind speed information.
【００３１】風分布算出部１８では、信号処理部１７か
ら入力する速度成分（風速情報）に対して座標変換を含
む各種処理を行い、ビーム方向指定入力部１１から与え
られる空中線ビーム方向（アジマス角、エレベーション
角）に対する風分布を算出する。The wind distribution calculation unit 18 performs various processes including coordinate conversion on the velocity component (wind speed information) input from the signal processing unit 17 and obtains the antenna beam direction (azimuth angle) given from the beam direction designation input unit 11. , Elevation angle).
【００３２】以上の説明から明らかなように、本実施形
態の風分布観測装置は、現状のウインドプロファイラや
境界層レーダが天頂方向の風分布しか直接観測できなか
ったのに対して、任意の方向に対する風分布を複数方向
に連続的に高い指向性で直接算出できることが可能とな
る。また、現状のウインドプロファイラや境界層レーダ
では不可能であった観測方向に対する雲や雨の有無が特
定できる。As is clear from the above description, the wind distribution observation apparatus of the present embodiment can directly observe only the wind distribution in the zenith direction, while the current wind profiler and boundary layer radar can directly observe the wind distribution in the zenith direction. Can be directly calculated with high directivity continuously in multiple directions. In addition, it is possible to specify the presence or absence of clouds and rain in the observation direction that was impossible with the current wind profiler and boundary layer radar.
【００３３】このような効果が得られることから、本実
施形態の風分布観測装置は、例えば空港の滑走路におけ
る複数方向の航空機離着陸経路それぞれの風分布観測を
ほぼ同時に行うことができる。このことから、短時間に
発生するマイクロバーストによる航空機事故を未然に防
止できるといった、極めて優れた実用性を発揮すること
ができる。Since such an effect is obtained, the wind distribution observation device of this embodiment can observe the wind distribution of each of the aircraft takeoff and landing paths in a plurality of directions on the runway of the airport, for example, almost simultaneously. From this, it is possible to exhibit extremely excellent practicability such as preventing aircraft accidents due to microbursts occurring in a short time.
【００３４】[0034]
【発明の効果】以上のように本発明によれば、任意の方
向に対する風分布を直接観測することができ、さらに
は、ビーム指向方向の雲、雨の有無を特定することので
きる風分布観測装置を提供することができる。As described above, according to the present invention, it is possible to directly observe the wind distribution in an arbitrary direction, and further to observe the wind distribution in which the presence or absence of clouds and rain in the beam direction can be specified. An apparatus can be provided.
【図１】 本発明に係る風分布観測装置の一実施形態の
全体構成を示すブロック図。FIG. 1 is a block diagram showing an overall configuration of an embodiment of a wind distribution observation device according to the present invention.
【図２】 同実施形態の装置と比較するための、従来の
ウインドプロファイラまたは境界層レーダのビーム走査
パターンを示す図。FIG. 2 is a view showing a beam scanning pattern of a conventional wind profiler or boundary layer radar for comparison with the apparatus of the embodiment.
【図３】 同実施形態のビーム走査パターンを示す図。FIG. 3 is a view showing a beam scanning pattern of the embodiment.
【図４】 同実施形態の信号処理部の処理手順を示す
図。FIG. 4 is an exemplary view showing a processing procedure of a signal processing unit of the embodiment.
１１…ビーム方向指定入力部 １２…空中線部 １３…空中線制御部 １４…送受信切替部 １５…送信部 １６…受信部 １７…信号処理部 １８…風分布算出部 １９…表示部 DESCRIPTION OF SYMBOLS 11 ... Beam direction specification input part 12 ... Antenna part 13 ... Antenna control part 14 ... Transmission / reception switching part 15 ... Transmission part 16 ... Reception part 17 ... Signal processing part 18 ... Wind distribution calculation part 19 ... Display part
Claims (4)
てビームを指定方向に形成し、パルスビームを放射して
その反射波を受信し、この受信信号からブラッグ散乱に
よるエコー成分を観測し、この観測結果から指定方向の
風分布を算出することを特徴とする風分布観測装置。1. A beam is formed in a designated direction using an antenna part whose beam direction can be controlled, a pulse beam is emitted, a reflected wave is received, and an echo component due to Bragg scattering is observed from the received signal. A wind distribution observation device that calculates a wind distribution in a designated direction from the observation result.
向させて複数方向の風分布を連続的に算出することを特
徴とする請求項１記載の風分布観測装置。2. The wind distribution observation apparatus according to claim 1, wherein the beam direction is directed in a plurality of directions in a time-division manner to continuously calculate a wind distribution in a plurality of directions.
方向の降雨・雲の有無を判別することを特徴とする請求
項１記載の風分布観測装置。3. The wind distribution observation apparatus according to claim 1, wherein the presence / absence of rain / cloud in the beam direction is determined based on the reception intensity in the beam direction.
と判定された場合に、前記受信信号についてブラッグ散
乱によるエコー観測を行って風速情報を算出することを
特徴とする請求項３記載の風分布観測装置。4. The wind speed information is calculated by performing echo observation by Bragg scattering on the received signal when it is determined that there is no rain / cloud in the rain / cloud presence / absence determination. Wind distribution observation device.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2000215026A JP2002031683A (en) | 2000-07-14 | 2000-07-14 | Wind distribution observation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000215026A JP2002031683A (en) | 2000-07-14 | 2000-07-14 | Wind distribution observation device |
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ID=18710516
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002031681A (en) * | 2000-07-14 | 2002-01-31 | Toshiba Corp | Meteorological radar |
| JP2012058162A (en) * | 2010-09-10 | 2012-03-22 | Toshiba Corp | Meteorological radar device and meteorological observation method |
| JP2017162514A (en) * | 2017-06-09 | 2017-09-14 | 国立研究開発法人宇宙航空研究開発機構 | System, method, and program for supporting landing judgement |
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|---|---|---|---|---|
| JPH10104255A (en) * | 1996-09-30 | 1998-04-24 | Toshiba Corp | Moving body detecting device |
| JPH11258358A (en) * | 1998-03-16 | 1999-09-24 | Mitsubishi Electric Corp | Hazardous airport weather condition judgment processing device |
| JP2000009857A (en) * | 1998-06-26 | 2000-01-14 | Mitsubishi Electric Corp | Weather radar device |
| JP2002031681A (en) * | 2000-07-14 | 2002-01-31 | Toshiba Corp | Meteorological radar |
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2000
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10104255A (en) * | 1996-09-30 | 1998-04-24 | Toshiba Corp | Moving body detecting device |
| JPH11258358A (en) * | 1998-03-16 | 1999-09-24 | Mitsubishi Electric Corp | Hazardous airport weather condition judgment processing device |
| JP2000009857A (en) * | 1998-06-26 | 2000-01-14 | Mitsubishi Electric Corp | Weather radar device |
| JP2002031681A (en) * | 2000-07-14 | 2002-01-31 | Toshiba Corp | Meteorological radar |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002031681A (en) * | 2000-07-14 | 2002-01-31 | Toshiba Corp | Meteorological radar |
| JP2012058162A (en) * | 2010-09-10 | 2012-03-22 | Toshiba Corp | Meteorological radar device and meteorological observation method |
| JP2017162514A (en) * | 2017-06-09 | 2017-09-14 | 国立研究開発法人宇宙航空研究開発機構 | System, method, and program for supporting landing judgement |
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