JPS5697886A - Loran a receiver - Google Patents

Loran a receiver

Info

Publication number
JPS5697886A
JPS5697886A JP15943079A JP15943079A JPS5697886A JP S5697886 A JPS5697886 A JP S5697886A JP 15943079 A JP15943079 A JP 15943079A JP 15943079 A JP15943079 A JP 15943079A JP S5697886 A JPS5697886 A JP S5697886A
Authority
JP
Japan
Prior art keywords
station
subordinate
loran
signal
main
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
JP15943079A
Other languages
Japanese (ja)
Other versions
JPS5855466B2 (en
Inventor
Yukihiro Shiaku
Minoru Handa
Masahiko Kimura
Hisatoku Hirasawa
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 JP15943079A priority Critical patent/JPS5855466B2/en
Publication of JPS5697886A publication Critical patent/JPS5697886A/en
Publication of JPS5855466B2 publication Critical patent/JPS5855466B2/en
Expired 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)
  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To enable to acquire and trace a loran signal stably over a wide range, by automatically selecting a loran signal excellent in reception state and by using it for the reference of measurement. CONSTITUTION:In a loran A receiver, measurement-reference-station selecting circuit 16 selects a station in an excellent reception state as a measurement reference station. For this purpose, output signals of automatic gain control AGC value circuits 7 and 8 are compared mutually, and output signals of main-station and subordinate-station signal propriety integrating circuit 17 and 18 are also compared mutually; and one station, i.e. the main or subordinate station, having a large difference in AGC value exceeding a constant value and a larger signal propriety integral value is selected as the measurement reference station. In this constitution, when the subordinate station as a tracing station has the AGC value greater than the constant value as the reception position moves even if the main station is assigned to the measurement reference station and the subordinate station to the tracing station, the subordinate station is assigned to the measurement reference station and the main station to the tracing station immediately, so that the loran signal can be acquired and traced stably over a wide range.
JP15943079A 1979-12-07 1979-12-07 Loran A receiver Expired JPS5855466B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15943079A JPS5855466B2 (en) 1979-12-07 1979-12-07 Loran A receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15943079A JPS5855466B2 (en) 1979-12-07 1979-12-07 Loran A receiver

Publications (2)

Publication Number Publication Date
JPS5697886A true JPS5697886A (en) 1981-08-06
JPS5855466B2 JPS5855466B2 (en) 1983-12-09

Family

ID=15693565

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15943079A Expired JPS5855466B2 (en) 1979-12-07 1979-12-07 Loran A receiver

Country Status (1)

Country Link
JP (1) JPS5855466B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125860U (en) * 1984-02-02 1985-08-24 藤田　眞吾 No-return device in fish traps

Also Published As

Publication number Publication date
JPS5855466B2 (en) 1983-12-09

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