JPH0149909B2 - - Google Patents

Info

Publication number
JPH0149909B2
JPH0149909B2 JP4628481A JP4628481A JPH0149909B2 JP H0149909 B2 JPH0149909 B2 JP H0149909B2 JP 4628481 A JP4628481 A JP 4628481A JP 4628481 A JP4628481 A JP 4628481A JP H0149909 B2 JPH0149909 B2 JP H0149909B2
Authority
JP
Japan
Prior art keywords
signal
circuit
altitude
ground
frequency
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.)
Expired
Application number
JP4628481A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57161572A (en
Inventor
Tadayuki Hamada
Masahiro Sunaoka
Kenzo Sugiura
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.)
BOEICHO GIJUTSU KENKYU HONBUCHO
Original Assignee
BOEICHO GIJUTSU KENKYU HONBUCHO
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 BOEICHO GIJUTSU KENKYU HONBUCHO filed Critical BOEICHO GIJUTSU KENKYU HONBUCHO
Priority to JP4628481A priority Critical patent/JPS57161572A/ja
Publication of JPS57161572A publication Critical patent/JPS57161572A/ja
Publication of JPH0149909B2 publication Critical patent/JPH0149909B2/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
    • 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
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/04—Systems determining presence of a target

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
JP4628481A 1981-03-31 1981-03-31 Discriminating device to ground Granted JPS57161572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4628481A JPS57161572A (en) 1981-03-31 1981-03-31 Discriminating device to ground

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4628481A JPS57161572A (en) 1981-03-31 1981-03-31 Discriminating device to ground

Publications (2)

Publication Number Publication Date
JPS57161572A JPS57161572A (en) 1982-10-05
JPH0149909B2 true JPH0149909B2 (fr) 1989-10-26

Family

ID=12742918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4628481A Granted JPS57161572A (en) 1981-03-31 1981-03-31 Discriminating device to ground

Country Status (1)

Country Link
JP (1) JPS57161572A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4839656A (en) * 1984-08-16 1989-06-13 Geostar Corporation Position determination and message transfer system employing satellites and stored terrain map
EP0248885B1 (fr) * 1985-12-04 1992-08-05 HSIEH, Dean Administration transcutanee de medicaments
US8077081B2 (en) * 2008-01-29 2011-12-13 Honeywell International Inc. Ground collision instrument for aircraft and marine vehicles
CN114200962B (zh) * 2022-02-15 2022-05-17 四川腾盾科技有限公司 无人机飞行任务执行情况分析方法

Also Published As

Publication number Publication date
JPS57161572A (en) 1982-10-05

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