FR2431136A1 - RADAR ALTIMETER WITH VARIABLE BEAM WIDTH - Google Patents

RADAR ALTIMETER WITH VARIABLE BEAM WIDTH

Info

Publication number
FR2431136A1
FR2431136A1 FR7918162A FR7918162A FR2431136A1 FR 2431136 A1 FR2431136 A1 FR 2431136A1 FR 7918162 A FR7918162 A FR 7918162A FR 7918162 A FR7918162 A FR 7918162A FR 2431136 A1 FR2431136 A1 FR 2431136A1
Authority
FR
France
Prior art keywords
beam width
radar altimeter
variable beam
altimeter
radar
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.)
Withdrawn
Application number
FR7918162A
Other languages
French (fr)
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of FR2431136A1 publication Critical patent/FR2431136A1/en
Withdrawn legal-status Critical Current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
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • 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
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • 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
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
    • G01S13/913—Radar or analogous systems specially adapted for specific applications for traffic control for landing purposes
    • 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
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/882—Radar or analogous systems specially adapted for specific applications for altimeters

Landscapes

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

Abstract

L'invention concerne les altimètres radar à impulsions. Pour éviter qu'un altimètre radar reçoive des échos parasites provenant d'éléments de l'aéronef lui-même, comme par exemple du train d'atterrissage, cet altimètre comporte un comparateur de durée, d'impulsion de porte 15, qui commute automatiquement sur une valeur faible la largeur de faisceau des antennes d'émission et de réception 5a, 10a, lorsque l'altitude est inférieure à une certaine valeur. Application aux équipements pour l'aéronautique.The invention relates to pulse radar altimeters. To prevent a radar altimeter from receiving parasitic echoes coming from elements of the aircraft itself, such as for example the landing gear, this altimeter includes a duration comparator, gate pulse 15, which switches automatically on a low value the beamwidth of the transmitting and receiving antennas 5a, 10a, when the altitude is below a certain value. Application to equipment for aeronautics.

FR7918162A 1978-07-12 1979-07-12 RADAR ALTIMETER WITH VARIABLE BEAM WIDTH Withdrawn FR2431136A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7829667 1978-07-12

Publications (1)

Publication Number Publication Date
FR2431136A1 true FR2431136A1 (en) 1980-02-08

Family

ID=10498395

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7918162A Withdrawn FR2431136A1 (en) 1978-07-12 1979-07-12 RADAR ALTIMETER WITH VARIABLE BEAM WIDTH

Country Status (3)

Country Link
DE (1) DE2928188A1 (en)
FR (1) FR2431136A1 (en)
GB (1) GB2029152A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281164B (en) * 1986-04-17 1995-06-21 Plessey Company The Radar systems for altitude determination
US7463187B2 (en) * 2006-09-27 2008-12-09 Honeywell International Inc. Method and system of improving altimeter accuracy by use of a separate peak return signal tracking

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1058579B (en) * 1958-04-23 1959-06-04 Decca Record Co Ltd Radar system with variable beam width
US3000007A (en) * 1955-05-02 1961-09-12 Decca Record Co Ltd Radar systems
FR2197246A1 (en) * 1972-08-25 1974-03-22 Westinghouse Electric Corp
FR2200983A5 (en) * 1972-09-05 1974-04-19 Messerschmitt Boelkow Blohm
US3965475A (en) * 1975-05-30 1976-06-22 The United States Of America As Represented By The United States Administrator Of The National Aeronautics And Space Administration Switchable beamwidth monopulse method and system
FR2335064A1 (en) * 1975-12-09 1977-07-08 Dassault Electronique RADAR FLAT ANTENNA

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000007A (en) * 1955-05-02 1961-09-12 Decca Record Co Ltd Radar systems
DE1058579B (en) * 1958-04-23 1959-06-04 Decca Record Co Ltd Radar system with variable beam width
FR2197246A1 (en) * 1972-08-25 1974-03-22 Westinghouse Electric Corp
FR2200983A5 (en) * 1972-09-05 1974-04-19 Messerschmitt Boelkow Blohm
US3965475A (en) * 1975-05-30 1976-06-22 The United States Of America As Represented By The United States Administrator Of The National Aeronautics And Space Administration Switchable beamwidth monopulse method and system
FR2335064A1 (en) * 1975-12-09 1977-07-08 Dassault Electronique RADAR FLAT ANTENNA

Also Published As

Publication number Publication date
DE2928188A1 (en) 1980-01-24
GB2029152A (en) 1980-03-12

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Legal Events

Date Code Title Description
ST Notification of lapse