JPS543569A - Underwater distance measuring system - Google Patents

Underwater distance measuring system

Info

Publication number
JPS543569A
JPS543569A JP6796877A JP6796877A JPS543569A JP S543569 A JPS543569 A JP S543569A JP 6796877 A JP6796877 A JP 6796877A JP 6796877 A JP6796877 A JP 6796877A JP S543569 A JPS543569 A JP S543569A
Authority
JP
Japan
Prior art keywords
distance measuring
measuring system
underwater
underwater distance
station
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
JP6796877A
Other languages
Japanese (ja)
Inventor
Masahiko Miyata
Akihito Nomura
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6796877A priority Critical patent/JPS543569A/en
Publication of JPS543569A publication Critical patent/JPS543569A/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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To prevent the influence of acoustic noise and perform measurement of underwater distances with good S/N by controlling the transmission of the acoustic signal of a sub-station with the underwater current from the main station.
JP6796877A 1977-06-10 1977-06-10 Underwater distance measuring system Pending JPS543569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6796877A JPS543569A (en) 1977-06-10 1977-06-10 Underwater distance measuring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6796877A JPS543569A (en) 1977-06-10 1977-06-10 Underwater distance measuring system

Publications (1)

Publication Number Publication Date
JPS543569A true JPS543569A (en) 1979-01-11

Family

ID=13360275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6796877A Pending JPS543569A (en) 1977-06-10 1977-06-10 Underwater distance measuring system

Country Status (1)

Country Link
JP (1) JPS543569A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115157A (en) * 1979-02-26 1980-09-04 Ricoh Co Ltd Picture processing unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115157A (en) * 1979-02-26 1980-09-04 Ricoh Co Ltd Picture processing unit

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