JPS5571960A - Direction finder - Google Patents

Direction finder

Info

Publication number
JPS5571960A
JPS5571960A JP14581178A JP14581178A JPS5571960A JP S5571960 A JPS5571960 A JP S5571960A JP 14581178 A JP14581178 A JP 14581178A JP 14581178 A JP14581178 A JP 14581178A JP S5571960 A JPS5571960 A JP S5571960A
Authority
JP
Japan
Prior art keywords
measuring
measured
measuring time
circuit
radio wave
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.)
Granted
Application number
JP14581178A
Other languages
Japanese (ja)
Other versions
JPS5723231B2 (en
Inventor
Shigeru Aono
Toru Kato
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.)
Technical Research and Development Institute of Japan Defence Agency
Original Assignee
Technical Research and Development Institute of Japan Defence Agency
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 Technical Research and Development Institute of Japan Defence Agency filed Critical Technical Research and Development Institute of Japan Defence Agency
Priority to JP14581178A priority Critical patent/JPS5571960A/en
Publication of JPS5571960A publication Critical patent/JPS5571960A/en
Publication of JPS5723231B2 publication Critical patent/JPS5723231B2/ja
Granted 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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/04—Details
    • G01S3/10—Means for reducing or compensating for quadrantal, site, or like errors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

09 PURPOSE:To measure efficiently the direction of a target by automatically controlling measuring time responsive to the intensity of coming radio wave, averaging the measuring data within the measured time, and then indicating the direction to thereby reduce the measuring error. CONSTITUTION:A direction finding antenna group 1 is switched in beam or element unit by an antenna switching circuit 2 to apply the switching output to a direction finding circuit 4 to thereby measure the direction of the target. The intensity of input electric field of the coming radio wave is measured by an electric field intensity measuring circuit 6, and a measuring time controller 7 calculates the measuring time responsive to the signal to noise ratio of the coming radio wave to obtain the intrinsic error of the instrument less than predetermined value by the measuring time controller 7. An averaging instrument 8 averages the measured data D outputted from the direction finding circuit 4 during the time thus calculated to average the measured data D after completing the measuring time to thus indicate the direction of the target via a direction indicator 5 by the measured output E obtained thus.
JP14581178A 1978-11-25 1978-11-25 Direction finder Granted JPS5571960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14581178A JPS5571960A (en) 1978-11-25 1978-11-25 Direction finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14581178A JPS5571960A (en) 1978-11-25 1978-11-25 Direction finder

Publications (2)

Publication Number Publication Date
JPS5571960A true JPS5571960A (en) 1980-05-30
JPS5723231B2 JPS5723231B2 (en) 1982-05-18

Family

ID=15393678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14581178A Granted JPS5571960A (en) 1978-11-25 1978-11-25 Direction finder

Country Status (1)

Country Link
JP (1) JPS5571960A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018159744A1 (en) * 2017-03-02 2018-09-07 日本電気株式会社 Measurement time specification device, sensing device, measurement time specification method, and computer-readable recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53145669A (en) * 1977-05-24 1978-12-19 Nec Corp Azimuth signal processing system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53145669A (en) * 1977-05-24 1978-12-19 Nec Corp Azimuth signal processing system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018159744A1 (en) * 2017-03-02 2018-09-07 日本電気株式会社 Measurement time specification device, sensing device, measurement time specification method, and computer-readable recording medium
JPWO2018159744A1 (en) * 2017-03-02 2020-01-09 日本電気株式会社 Measurement time identification device, detection device, measurement time identification method and program
US11448565B2 (en) 2017-03-02 2022-09-20 Nec Corporation Measurement time determination device, measurement time determination method, and computer-readable recording medium

Also Published As

Publication number Publication date
JPS5723231B2 (en) 1982-05-18

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