JPS54161293A - Clutter removal system - Google Patents

Clutter removal system

Info

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
Application number
JP7014578A
Other languages
Japanese (ja)
Inventor
Makoto Ono
Seiji Mano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7014578A priority Critical patent/JPS54161293A/en
Publication of JPS54161293A publication Critical patent/JPS54161293A/en
Pending legal-status Critical Current

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.
JP7014578A 1978-06-09 1978-06-09 Clutter removal system Pending JPS54161293A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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