JPH06214024A - Radar rain gauge - Google Patents
Radar rain gaugeInfo
- Publication number
- JPH06214024A JPH06214024A JP5003938A JP393893A JPH06214024A JP H06214024 A JPH06214024 A JP H06214024A JP 5003938 A JP5003938 A JP 5003938A JP 393893 A JP393893 A JP 393893A JP H06214024 A JPH06214024 A JP H06214024A
- Authority
- JP
- Japan
- Prior art keywords
- rainfall
- time difference
- intensity
- amount
- radar
- 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.)
- Pending
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
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はレーダビームを使用して
雨量を測定するレーダ雨量計に係わり、特にレーダビー
ムによる観測高度の違いから生じた誤差を補正するレー
ダ雨量計に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radar rain gauge for measuring rainfall using a radar beam, and more particularly to a radar rain gauge for correcting an error caused by a difference in observation altitude due to the radar beam.
【０００２】[0002]
【従来の技術】レーダビームを使用して雨量を測定する
レーダ雨量計として、従来、図３に示す雨量計が知られ
ている。2. Description of the Related Art A rain gauge shown in FIG. 3 is conventionally known as a radar rain gauge that measures a rainfall amount using a radar beam.
【０００３】この図に示すレーダ雨量計はレーダビーム
の反射波を受信してその強度を検出する電波受信処理部
１０１と、この電波受信処理部１０１によって得られた
受信強度に基づいて降雨の強度を演算する降雨強度演算
処理部１０２と、この降雨強度演算処理部１０２によっ
て得られた降雨強度を一定時間平均化して各観測地点の
降雨強度を決定する降雨強度決定部１０３とを備えてお
り、レーダビームを出射してその反射波を受信するとと
もに、その受信強度に基づいて各観測地点の降雨強度を
求める。The radar rain gauge shown in this figure receives a reflected wave of a radar beam and detects its intensity, and a rainfall intensity based on the intensity of the received signal obtained by the radio wave reception processing unit 101. And a rainfall intensity determination unit 103 that averages the rainfall intensity obtained by the rainfall intensity calculation processing unit 102 for a certain period of time to determine the rainfall intensity at each observation point. The radar beam is emitted, the reflected wave is received, and the rainfall intensity at each observation point is obtained based on the received intensity.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た従来のレーダ雨量計においては、次に述べるような問
題があった。However, the above-described conventional radar rain gauge has the following problems.
【０００５】すなわち、図３に示すレーダ雨量計では、
観測地点における地上からの高度により生じる誤差を無
視しているため、空中線の仰角が大きくなり、レーダ雨
量計の観測範囲が広域になるほど、さらに雨の降り方が
局所的になり、降雨強度が激しく変化するほど、測定精
度が著しく低下してしまうという問題があった。That is, in the radar rain gauge shown in FIG.
Since the error caused by the altitude from the ground at the observation point is ignored, the larger the elevation angle of the aerial line and the wider the observation range of the radar rain gauge, the more localized the way the rain falls and the more intense the rainfall intensity. There has been a problem that the measurement accuracy is remarkably reduced as it changes.
【０００６】また、地上雨量計によって得られた雨量に
基づいてレーダ雨量計で得られた降雨量を補正して測定
精度を補正し、これによって精度を向上させる場合、時
間的にずれた雨量に基づいて降雨量を補正することにな
るので、かえって精度が低下してしまうこともあった。Further, when the rainfall obtained by the radar rain gauge is corrected on the basis of the rainfall obtained by the ground rain gauge to correct the measurement accuracy, and thus the accuracy is improved, when the rainfall is shifted in time, Since the amount of rainfall will be corrected based on this, the accuracy may have deteriorated.
【０００７】本発明は上記の事情に鑑み、空中線の仰角
が大きくなり、レーダ雨量計の観測範囲が広域になり、
さらに雨の降り方が局所的になり、降雨強度が激しく変
化するときでも、レーダビームによる降雨量の計測精度
が低下しないようにすることができ、これによって降雨
量の計測精度を大幅に向上させることができるレーダ雨
量計を提供することを目的としている。In view of the above circumstances, the present invention increases the elevation angle of the antenna and widens the observation range of the radar rain gauge,
Furthermore, even when the way of rain is localized and the rainfall intensity changes drastically, it is possible to prevent the accuracy of rainfall measurement by radar beams from deteriorating, thereby significantly improving the accuracy of rainfall measurement. The purpose of the present invention is to provide a radar rain gauge that can be used.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
めに本発明によるレーダ雨量計は、レーダビームの反射
波の強度に基づいて観測地点の降雨量を計測する降雨量
計測部と、前記レーダビームによる降雨量の観測地点に
ある降雨が落下して地上に達するまでの時間を演算する
時間差演算部と、前記降雨量計測部によって得られた降
雨量を前記時間差演算部によって得られた時間差で補正
して地上における降雨量に変換する時間差補正部とを備
えたことを特徴としている。In order to achieve the above object, a radar rain gauge according to the present invention comprises a rainfall amount measuring section for measuring the rainfall amount at an observation point based on the intensity of a reflected wave of a radar beam. The time difference obtained by the time difference calculation unit, and the time difference calculation unit that calculates the time until the rainfall at the observation point of the rainfall amount by the radar beam reaches the ground and the rainfall amount obtained by the rainfall amount measurement unit. It is characterized by including a time difference correction unit that corrects the above and converts it into rainfall on the ground.
【０００９】[0009]
【作用】上記の構成において、降雨量計測部によってレ
ーダビームの反射波の強度に基づき観測地点の降雨量が
計測されるとともに、時間差演算部によって前記観測地
点にある降雨が落下して地上に達するまでの時間が演算
された後、時間差補正部によって前記降雨量計測部で得
られた降雨量が前記時間差演算部で得られた時間差で補
正されて地上における降雨量に変換される。In the above structure, the rainfall amount measuring unit measures the rainfall amount at the observation point based on the intensity of the reflected wave of the radar beam, and the time difference calculation unit causes the rainfall amount at the observation point to drop and reach the ground. After the time is calculated, the amount of rainfall obtained by the rainfall amount measuring unit is corrected by the time difference correcting unit by the time difference obtained by the time difference calculating unit and converted into the amount of rainfall on the ground.
【００１０】[0010]
【実施例】図１は本発明によるレーダ雨量計の一実施例
を示すブロック図である。1 is a block diagram showing an embodiment of a radar rain gauge according to the present invention.
【００１１】この図に示すレーダ雨量計は電波受信処理
部１と、降雨強度演算処理部２と、高度演算処理部３
と、時間差演算処理部４と、時間差補正処理部５と、降
雨強度決定部６とを備えており、レーダビームによって
得られた降雨量を高さ補正して観測メッシュ毎の降雨量
を計測する。The radar rain gauge shown in this figure has a radio wave reception processing unit 1, a rainfall intensity calculation processing unit 2, and an altitude calculation processing unit 3.
A time difference calculation processing unit 4, a time difference correction processing unit 5, and a rainfall intensity determination unit 6 are provided, and the rainfall amount obtained by the radar beam is height-corrected to measure the rainfall amount for each observation mesh. .
【００１２】電波受信処理部１はレーダビームの反射波
を受信してその強度を検出し、この検出結果（受信強
度）を降雨強度演算処理部２に供給する。The radio wave reception processing unit 1 receives the reflected wave of the radar beam, detects its intensity, and supplies the detection result (reception intensity) to the rainfall intensity calculation processing unit 2.
【００１３】降雨強度演算処理部２は前記電波受信処理
部１から出力される受信強度を取り込むとともに、この
受信強度に基づいて降雨の強度を演算し、この演算結果
（降雨強度）を時間差補正処理部５に供給する。The rainfall intensity calculation processing unit 2 takes in the reception intensity output from the radio wave reception processing unit 1, calculates the rainfall intensity based on this reception intensity, and performs a time difference correction process on the calculation result (rainfall intensity). Supply to part 5.
【００１４】また、高度演算処理部３は空中線装置の取
付け高度および仰角と、地球の径との関係式に基づいて
レーダ雨量計を中心としたレーダ雨量計の観測メッシュ
毎にレーダビームの中心高度を演算してこれを時間差演
算処理部４に供給する。Further, the altitude calculation processing unit 3 uses the relational expressions of the mounting height and elevation angle of the aerial device and the diameter of the earth, and the central altitude of the radar beam for each observation mesh of the radar rain gauge centering on the radar rain gauge. Is supplied to the time difference calculation processing unit 4.
【００１５】時間差演算処理部４は前記高度演算処理部
３から出力されるレーダビームの中心高度と、降雨の平
均的な落下速度（例えば、４〜６ｍ／ｓ）とに基づいて
観測メッシュ点の降雨が落下して地上に達するまでの時
間を求め、これを時間差として時間差補正処理部５に供
給する。The time difference calculation processing unit 4 determines the observation mesh points based on the central altitude of the radar beam output from the altitude calculation processing unit 3 and the average falling velocity of rainfall (for example, 4 to 6 m / s). The time required for the rain to fall and reach the ground is obtained, and this time difference is supplied to the time difference correction processing unit 5.
【００１６】時間差補正処理部５は前記降雨強度演算処
理部２から出力される降雨強度を取り込むとともに、必
要に応じてこれを直線補間した後、一定時間分だけ蓄積
し、さらに前記時間差演算処理部４から出力される時間
差に基づいて蓄積している降雨強度のうち、対応する過
去の降雨強度を選択してこれを時間差補正済みの降雨強
度として降雨強度決定部６に供給する。The time difference correction processing unit 5 takes in the rainfall intensity output from the rainfall intensity calculation processing unit 2, linearly interpolates it if necessary, and then accumulates it for a fixed time, and further, the time difference calculation processing unit. Among the rainfall intensities accumulated on the basis of the time difference output from 4, the corresponding past rainfall intensity is selected and supplied to the rainfall intensity determination unit 6 as the time difference corrected rainfall intensity.
【００１７】降雨強度決定部６は前記降雨強度演算処理
部５から出力される降雨強度を取り込むとともに、一定
時間平均化して各観測地点の降雨強度を決定する。The rainfall intensity determination unit 6 takes in the rainfall intensity output from the rainfall intensity calculation processing unit 5 and averages it for a certain period of time to determine the rainfall intensity at each observation point.
【００１８】このようにこの実施例においては、レーダ
ビームによって得られた降雨量を高さ補正して観測メッ
シュ毎の降雨量を計測するようにしているので、図２に
示す如くレーダビームによって得られた降雨量を時間的
にずらして地上側の雨量と一致させることができる。As described above, in this embodiment, the rainfall amount obtained by the radar beam is height-corrected to measure the rainfall amount for each observation mesh. Therefore, as shown in FIG. The amount of rainfall can be shifted in time to match the amount of rainfall on the ground side.
【００１９】これによって、空中線の仰角が大きくな
り、レーダ雨量計の観測範囲が広域になり、さらに雨の
降り方が局所的になり、降雨強度が激しく変化するとき
でも、レーダビームによる降雨量の計測精度が低下しな
いようにすることができ、これによって降雨量の計測精
度を大幅に向上させることができる。As a result, the elevation angle of the aerial ray becomes large, the observation range of the radar rain gauge becomes wide, and the way of rainfall is localized, and even when the rainfall intensity changes drastically, It is possible to prevent the measurement accuracy from deteriorating, which can significantly improve the measurement accuracy of the rainfall amount.
【００２０】また、上述した実施例においては、高度演
算処理部３によって空中線装置の取付け高度および仰角
と、地球の径との関係式に基づいてレーダ雨量計を中心
としたレーダ雨量計の観測メッシュ毎にレーダビームの
中心高度を演算してこれを時間差演算処理部４に供給す
るようにしているが、この処理において、観測メッシュ
毎に地上側の標高を考慮するようにし、これによって標
高差がある地域での計測精度を向上させるようにしても
良い。Further, in the above-mentioned embodiment, the observation mesh of the radar rain gauge centering on the radar rain gauge is based on the relational expression between the installation altitude and elevation angle of the antenna device and the diameter of the earth by the altitude calculation processing unit 3. The central altitude of the radar beam is calculated for each time, and this is supplied to the time difference calculation processing unit 4. In this processing, the altitude on the ground side is considered for each observation mesh, and the altitude difference is You may make it improve the measurement precision in a certain area.
【００２１】また、上述した実施例においては、時間差
演算処理部４によって前記高度演算処理部３から出力さ
れるレーダビームの中心高度と、降雨の平均的な落下速
度（例えば、４〜６ｍ／ｓ）とに基づいて観測メッシュ
点の降雨が落下して地上に達するまでの時間を求め、こ
れを時間差として時間差補正処理部５に供給するように
しているが、このような平均的な落下速度に代わりに、
その都度、最適な降雨速度を使用して観測メッシュ点の
降雨が落下して地上に達するまでの時間を求めるように
しても良い。In the above-described embodiment, the central altitude of the radar beam output from the altitude calculation processing unit 3 by the time difference calculation processing unit 4 and the average falling velocity of rainfall (for example, 4 to 6 m / s). ) And the time it takes for the rainfall at the observation mesh points to fall and reach the ground, and supplies this to the time difference correction processing unit 5 as a time difference. instead of,
In each case, the optimum rainfall rate may be used to obtain the time required for the rainfall at the observation mesh points to fall and reach the ground.
【００２２】また、上述した実施例においては、時間差
補正処理部５によって前記降雨強度演算処理部２から出
力される降雨強度を取り込むとともに、必要に応じてこ
れを直線補間した後、一定時間分だけ蓄積し、さらに前
記時間差演算処理部４から出力される時間差に基づいて
蓄積している降雨強度のうち、対応する過去の降雨強度
を選択してこれを時間差補正済みの降雨強度として降雨
強度決定部６に供給するようにしているが、このような
直線補間に代えて降雨の推移に合った曲線で降雨強度を
補間するようにしても良い。Further, in the above-described embodiment, the time difference correction processing unit 5 fetches the rainfall intensity output from the rainfall intensity calculation processing unit 2 and linearly interpolates the rainfall intensity as required, and then, only for a predetermined time. Among the rainfall intensities that have been accumulated and further accumulated based on the time difference output from the time difference calculation processing unit 4, the corresponding past rainfall intensity is selected, and this is used as the rain intensity after time difference correction, However, instead of such linear interpolation, the rainfall intensity may be interpolated with a curve that matches the transition of rainfall.
【００２３】[0023]
【発明の効果】以上説明したように本発明によれば、空
中線の仰角が大きくなり、レーダ雨量計の観測範囲が広
域になり、さらに雨の降り方が局所的になり、降雨強度
が激しく変化するときでも、レーダビームによる降雨量
の計測精度が低下しないようにすることができ、これに
よって降雨量の計測精度を大幅に向上させることができ
る。As described above, according to the present invention, the elevation angle of the aerial line becomes large, the observation range of the radar rain gauge becomes wide, and the way of rain is local, and the rainfall intensity changes drastically. Even when doing so, it is possible to prevent the measurement accuracy of the rainfall amount by the radar beam from deteriorating, and thus it is possible to greatly improve the measurement accuracy of the rainfall amount.
【図１】本発明によるレーダ雨量計の一実施例を示すブ
ロック図である。FIG. 1 is a block diagram showing an embodiment of a radar rain gauge according to the present invention.
【図２】図１に示すレーダ雨量計の動作例を示す表図で
ある。FIG. 2 is a table showing an operation example of the radar rain gauge shown in FIG.
【図３】従来から知られているレーダ雨量計の一例を示
すブロック図である。FIG. 3 is a block diagram showing an example of a conventionally known radar rain gauge.
１ 電波受信処理部（降雨量計測部） ２ 降雨強度演算処理部（降雨量計測部） ３ 高度演算処理部（時間差演算部） ４ 時間差演算処理部（時間差演算部） ５ 時間差補正処理部（時間差補正部） ６ 降雨強度決定部 1 Radio wave reception processing unit (rainfall amount measuring unit) 2 Rain intensity calculation processing unit (rainfall amount measuring unit) 3 Altitude calculation processing unit (time difference calculation unit) 4 Time difference calculation processing unit (time difference calculation unit) 5 Time difference correction processing unit (time difference Correction unit) 6 Rain intensity determination unit
Claims (1)
観測地点の降雨量を計測する降雨量計測部と、 前記レーダビームによる降雨量の観測地点にある降雨が
落下して地上に達するまでの時間を演算する時間差演算
部と、 前記降雨量計測部によって得られた降雨量を前記時間差
演算部によって得られた時間差で補正して地上における
降雨量に変換する時間差補正部と、 を備えたことを特徴とするレーダ雨量計。1. A rainfall amount measuring unit for measuring rainfall amount at an observation point on the basis of the intensity of a reflected wave of a radar beam; and a rainfall amount measuring unit for measuring rainfall amount at the observation point by the radar beam until it reaches the ground. A time difference calculation unit for calculating time; and a time difference correction unit for correcting the rainfall amount obtained by the rainfall amount measurement unit with the time difference obtained by the time difference calculation unit and converting it into rainfall amount on the ground. Radar rain gauge characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5003938A JPH06214024A (en) | 1993-01-13 | 1993-01-13 | Radar rain gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5003938A JPH06214024A (en) | 1993-01-13 | 1993-01-13 | Radar rain gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06214024A true JPH06214024A (en) | 1994-08-05 |
Family
ID=11571075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5003938A Pending JPH06214024A (en) | 1993-01-13 | 1993-01-13 | Radar rain gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06214024A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384205A (en) * | 1992-10-26 | 1995-01-24 | Daido Metal Company Ltd. | Multi-layer slide bearing having Al-Sn alloy layer with high fatigue strength and conformability |
| KR101469860B1 (en) * | 2013-10-07 | 2014-12-08 | 부경대학교 산학협력단 | Method for gaining information about the convection precipitation in use of the weather radar |
-
1993
- 1993-01-13 JP JP5003938A patent/JPH06214024A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384205A (en) * | 1992-10-26 | 1995-01-24 | Daido Metal Company Ltd. | Multi-layer slide bearing having Al-Sn alloy layer with high fatigue strength and conformability |
| KR101469860B1 (en) * | 2013-10-07 | 2014-12-08 | 부경대학교 산학협력단 | Method for gaining information about the convection precipitation in use of the weather radar |
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