GB1297086A - - Google Patents

Info

Publication number
GB1297086A
GB1297086A GB1297086DA GB1297086A GB 1297086 A GB1297086 A GB 1297086A GB 1297086D A GB1297086D A GB 1297086DA GB 1297086 A GB1297086 A GB 1297086A
Authority
GB
United Kingdom
Prior art keywords
replies
radar
pulse radar
lassiter
ofsight
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.)
Expired
Application number
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 filed Critical
Publication of GB1297086A publication Critical patent/GB1297086A/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
    • 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
    • G01S13/46—Indirect determination of position data
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G01S13/876—Combination of several spaced transponders or reflectors of known location for determining the position of a receiver

Landscapes

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

Abstract

1297086 Pulse radar J W LASSITER 1 Oct 1970 46791/70 Heading H4D It is stated that ground-wave propagation at 100 MHz and above, at many times line-ofsight distance, is sufficient to enable position determination. In an embodiment a ship carries a pulse radar which triggers replies from responders at known positions some hundreds of miles away. The radar may comprise the apparatus outlined in Fig. 4, transmission being alternately on frequencies f 1 , f 2 ; one responder replies on f 1 and the other on f 2 .
GB1297086D 1970-10-01 1970-10-01 Expired GB1297086A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4679170 1970-10-01

Publications (1)

Publication Number Publication Date
GB1297086A true GB1297086A (en) 1972-11-22

Family

ID=10442615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1297086D Expired GB1297086A (en) 1970-10-01 1970-10-01

Country Status (1)

Country Link
GB (1) GB1297086A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2807979A1 (en) * 1978-02-24 1979-08-30 Standard Elektrik Lorenz Ag Transmitter to receiver range finding system - uses modulated transmission signal from which receiver derives 135 Hz test and reference pulse trains
CN101937026A (en) * 2010-07-30 2011-01-05 西安理工大学 Integration method for predicating ground wave propagation attenuation factor at high precision

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2807979A1 (en) * 1978-02-24 1979-08-30 Standard Elektrik Lorenz Ag Transmitter to receiver range finding system - uses modulated transmission signal from which receiver derives 135 Hz test and reference pulse trains
CN101937026A (en) * 2010-07-30 2011-01-05 西安理工大学 Integration method for predicating ground wave propagation attenuation factor at high precision
CN101937026B (en) * 2010-07-30 2013-04-17 西安理工大学 Method for predicating ground wave propagation attenuation factor at high precision

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee