JPS57192883A - Acquiring method for loran signal - Google Patents

Acquiring method for loran signal

Info

Publication number
JPS57192883A
JPS57192883A JP7825481A JP7825481A JPS57192883A JP S57192883 A JPS57192883 A JP S57192883A JP 7825481 A JP7825481 A JP 7825481A JP 7825481 A JP7825481 A JP 7825481A JP S57192883 A JPS57192883 A JP S57192883A
Authority
JP
Japan
Prior art keywords
acquisition
master station
station signal
ram71
signal
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
JP7825481A
Other languages
Japanese (ja)
Other versions
JPS6258474B2 (en
Inventor
Hideki Tanaka
Kenji Ima
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.)
Furuno Electric Co Ltd
Original Assignee
Furuno Electric Co 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 Furuno Electric Co Ltd filed Critical Furuno Electric Co Ltd
Priority to JP7825481A priority Critical patent/JPS57192883A/en
Publication of JPS57192883A publication Critical patent/JPS57192883A/en
Publication of JPS6258474B2 publication Critical patent/JPS6258474B2/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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • G01S1/24—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being pulses or equivalent modulations on carrier waves and the transit times being compared by measuring the difference in arrival time of a significant part of the modulations, e.g. LORAN systems
    • G01S1/245—Details of receivers cooperating therewith, e.g. determining positive zero crossing of third cycle in LORAN-C

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

PURPOSE:To facilitate the acquisition of a master station signal even in a region wherein S/N is bad, by sampling the master station signal in plural times by an acquisition timing based on a current position and a plurality of acquisition timings of slave stations discriminated according to these stations, and by accumulating and averaging the signal. CONSTITUTION:A current position is set through NNSS11 for setting the current position or an input key 9 and written in a buffer area of RAM71 of a microcomputer 7, or the like. A plurality of acquisition timings of slave station signals, acquired through a sampling circuit 4 and discriminated according to the stations by the computer 7, and a chain table GRI, etc. are also written in a slave station counter area TS1 of said RAM71, and the computer 7 computes the acquisition timing of a master station signal based on the same and makes this timing memorized in a master station counter area TM of RAM71. A real time counter 8, the circuit 4, etc. being controlled by this acquisition timing, the master station signal is sampled in plural times and accumulated and averaged later by the computer 7, and thus the acquisition of the master station signal is performed easily and surely even in a region wherein S/N is bad.
JP7825481A 1981-05-23 1981-05-23 Acquiring method for loran signal Granted JPS57192883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7825481A JPS57192883A (en) 1981-05-23 1981-05-23 Acquiring method for loran signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7825481A JPS57192883A (en) 1981-05-23 1981-05-23 Acquiring method for loran signal

Publications (2)

Publication Number Publication Date
JPS57192883A true JPS57192883A (en) 1982-11-27
JPS6258474B2 JPS6258474B2 (en) 1987-12-05

Family

ID=13656852

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7825481A Granted JPS57192883A (en) 1981-05-23 1981-05-23 Acquiring method for loran signal

Country Status (1)

Country Link
JP (1) JPS57192883A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333846A1 (en) * 1987-09-28 1989-09-27 Bahr Technologies, Inc. Apparatus and method for receiving and processing loran signals

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63216089A (en) * 1987-03-05 1988-09-08 Ricoh Co Ltd Production of surface relief type hologram

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333846A1 (en) * 1987-09-28 1989-09-27 Bahr Technologies, Inc. Apparatus and method for receiving and processing loran signals
EP0333846A4 (en) * 1987-09-28 1991-01-16 Bahr Technologies, Inc. Apparatus and method for receiving and processing loran signals

Also Published As

Publication number Publication date
JPS6258474B2 (en) 1987-12-05

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