GB994082A - Improvements in devices for the calculation of coordinates of a point at the surfaceof the earth - Google Patents

Improvements in devices for the calculation of coordinates of a point at the surfaceof the earth

Info

Publication number
GB994082A
GB994082A GB4076961A GB4076961A GB994082A GB 994082 A GB994082 A GB 994082A GB 4076961 A GB4076961 A GB 4076961A GB 4076961 A GB4076961 A GB 4076961A GB 994082 A GB994082 A GB 994082A
Authority
GB
United Kingdom
Prior art keywords
pulses
satellite
clock
ship
nov
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
GB4076961A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB994082A publication Critical patent/GB994082A/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
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio 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
    • 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

Landscapes

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

Abstract

994,082. Radio navigation. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Nov. 14, 1961 [Nov. 18, 1960], No. 40769/61. Heading H4D. In a radio navigation system an artificial satellite carries a stable clock 1, Fig. 1, controlling a modulator 2 of a radio transmitter 3 to emit signals at predetermined times and the vehicle or craft (e.g. a ship) wishing to determine its own position carries a receiver 4, a clock 5 producing signals in synchronism with those of clock 1, and a phase-comparator 6. In one embodiment, transmitter 3 emits groups of four pulses, Fig. 3, separated by different time intervals to assist indentification. The received pulses are shifted by a time interval T 0 from the local clock pulses and the distance to the satellite at the instant considered is thus determined by measuring T 0 . Known tables are used for providing the instantaneous co-ordinates of the satellite. The time interval measurement is repeated on all pulses which occur when the satellite passes in sight of the ship. To eliminate ambiguity in determining the ship's position, two vertical receiving aerials spaced #/2 apart are provided.
GB4076961A 1960-11-18 1961-11-14 Improvements in devices for the calculation of coordinates of a point at the surfaceof the earth Expired GB994082A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR844299A FR1281965A (en) 1960-11-18 1960-11-18 New device allowing the calculation of the coordinates of a point on the surface of the earth

Publications (1)

Publication Number Publication Date
GB994082A true GB994082A (en) 1965-06-02

Family

ID=8742945

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4076961A Expired GB994082A (en) 1960-11-18 1961-11-14 Improvements in devices for the calculation of coordinates of a point at the surfaceof the earth

Country Status (2)

Country Link
FR (1) FR1281965A (en)
GB (1) GB994082A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014066A (en) * 1982-03-01 1991-05-07 Western Atlas International, Inc. System for simultaneously deriving position information from a plurality of satellite transmissions
US5619212A (en) * 1982-03-01 1997-04-08 Western Atlas International, Inc. System for determining position from suppressed carrier radio waves

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014066A (en) * 1982-03-01 1991-05-07 Western Atlas International, Inc. System for simultaneously deriving position information from a plurality of satellite transmissions
US5619212A (en) * 1982-03-01 1997-04-08 Western Atlas International, Inc. System for determining position from suppressed carrier radio waves
US5805200A (en) 1982-03-01 1998-09-08 Western Atlas International, Inc. System for determining position from pseudorandomly modulated radio signals

Also Published As

Publication number Publication date
FR1281965A (en) 1962-01-19

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