JPS57186112A - Displaying method for track of moving target - Google Patents

Displaying method for track of moving target

Info

Publication number
JPS57186112A
JPS57186112A JP56070813A JP7081381A JPS57186112A JP S57186112 A JPS57186112 A JP S57186112A JP 56070813 A JP56070813 A JP 56070813A JP 7081381 A JP7081381 A JP 7081381A JP S57186112 A JPS57186112 A JP S57186112A
Authority
JP
Japan
Prior art keywords
data
track
moving target
stored
memory
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
JP56070813A
Other languages
Japanese (ja)
Inventor
Katsuyasu Kato
Toshio Usui
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 JP56070813A priority Critical patent/JPS57186112A/en
Publication of JPS57186112A publication Critical patent/JPS57186112A/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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/04—Display arrangements

Landscapes

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

Abstract

PURPOSE:To reduce the capacity of a necessary memory for displaying a smooth track by varying intervals of storage for track data in accordance with extents of variations is the speed and direction of a moving target. CONSTITUTION:Moving target data updated momentary are sampled at a predetermined period; when the extents of variations in speed and direction are greater than threshold levels, the moving target data are stored in a track data memory and on the basis of the stored data, track display is carried out. For example, data on the position of a moving target, sampled at a constant period tau0, at time ti is denoted as Pi<s>, and data on an estimated position, extrapolated from track data stored shortly before, at the time ti is denoted as Pi<p>. Only when a threshold value epsilon is greater than¦Pi<s>-Pi<p>¦, the data Pi<p> at a circle mark is stored in the track memory.
JP56070813A 1981-05-13 1981-05-13 Displaying method for track of moving target Pending JPS57186112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56070813A JPS57186112A (en) 1981-05-13 1981-05-13 Displaying method for track of moving target

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56070813A JPS57186112A (en) 1981-05-13 1981-05-13 Displaying method for track of moving target

Publications (1)

Publication Number Publication Date
JPS57186112A true JPS57186112A (en) 1982-11-16

Family

ID=13442381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56070813A Pending JPS57186112A (en) 1981-05-13 1981-05-13 Displaying method for track of moving target

Country Status (1)

Country Link
JP (1) JPS57186112A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989012237A1 (en) * 1988-06-01 1989-12-14 Furuno Electric Company, Limited Track display apparatus
JPH0371015A (en) * 1989-08-11 1991-03-26 Mitsubishi Electric Corp On-vehicle navigation device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989012237A1 (en) * 1988-06-01 1989-12-14 Furuno Electric Company, Limited Track display apparatus
GB2230913A (en) * 1988-06-01 1990-10-31 Furuno Electric Co Track display apparatus
US5065161A (en) * 1988-06-01 1991-11-12 Furuno Electric Company Limited Ship track indicating apparatus
GB2230913B (en) * 1988-06-01 1992-09-30 Furuno Electric Co Ship track indicating apparatus
JPH0371015A (en) * 1989-08-11 1991-03-26 Mitsubishi Electric Corp On-vehicle navigation device

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