JPS54161293A - Clutter removal system - Google Patents
Clutter removal systemInfo
- Publication number
- JPS54161293A JPS54161293A JP7014578A JP7014578A JPS54161293A JP S54161293 A JPS54161293 A JP S54161293A JP 7014578 A JP7014578 A JP 7014578A JP 7014578 A JP7014578 A JP 7014578A JP S54161293 A JPS54161293 A JP S54161293A
- Authority
- JP
- Japan
- Prior art keywords
- power
- deltatheta
- width
- rain
- antenna
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/95—Radar or analogous systems specially adapted for specific applications for meteorological use
-
- 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
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
PURPOSE:To make it possible to remove a clutter by selecting the optimum combination of the beam width and pulse width of an antenna, as to a pulse radar which receives scattering power from rain from skies and the ground surface and then observes its state. CONSTITUTION:Rader antenna 1 emits a beam at angle thetaO. When the pulse width of the radar is denoted by (tau) and the velocity of light by (c), the hatching part encircled by Ctau/2 and beam width DELTAtheta is rain observation region 3. Although almost all radiation power is contained in beam width DELTAtheta of the radar antenna 1, part of power is radiated in all directions except DELTAtheta, which is side-lobe radiation. Therefore, the range gate system receives scattering power from AB and A'B' of ground 2 contained in the width of a distance a half (ctau) even by a side lobe and if this reception level is higher than scattering power, the rain observation becomes impossible. Namely, ratio (eta) of rain scattering reception power to ground clutter power should be less than a certain value. For the purpose, the combination of beam width DELTAtheta and pulse width (tau) should be set to the best one.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7014578A JPS54161293A (en) | 1978-06-09 | 1978-06-09 | Clutter removal system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7014578A JPS54161293A (en) | 1978-06-09 | 1978-06-09 | Clutter removal system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54161293A true JPS54161293A (en) | 1979-12-20 |
Family
ID=13423106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7014578A Pending JPS54161293A (en) | 1978-06-09 | 1978-06-09 | Clutter removal system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54161293A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1986006499A1 (en) * | 1985-04-22 | 1986-11-06 | Toyo Communication Equipment Co., Ltd. | Nearby airplane detecting system |
JPH02118482A (en) * | 1988-10-28 | 1990-05-02 | Japan Radio Co Ltd | Radar type wave height measuring instrument |
JPH0476482A (en) * | 1990-07-18 | 1992-03-11 | Nec Corp | Synthetic aperture radar device |
-
1978
- 1978-06-09 JP JP7014578A patent/JPS54161293A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1986006499A1 (en) * | 1985-04-22 | 1986-11-06 | Toyo Communication Equipment Co., Ltd. | Nearby airplane detecting system |
JPH02118482A (en) * | 1988-10-28 | 1990-05-02 | Japan Radio Co Ltd | Radar type wave height measuring instrument |
JPH0476482A (en) * | 1990-07-18 | 1992-03-11 | Nec Corp | Synthetic aperture radar device |
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