BE431148A - - Google Patents

Info

Publication number
BE431148A
BE431148A BE431148DA BE431148A BE 431148 A BE431148 A BE 431148A BE 431148D A BE431148D A BE 431148DA BE 431148 A BE431148 A BE 431148A
Authority
BE
Belgium
Prior art keywords
signals
indicating device
optical indicating
categories
frequency
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE431148A publication Critical patent/BE431148A/fr

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S1/00Beacons 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
    • G01S1/02Beacons 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)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Selective Calling Equipment (AREA)
BE431148D BE431148A (de)

Publications (1)

Publication Number Publication Date
BE431148A true BE431148A (de)

Family

ID=90992

Family Applications (1)

Application Number Title Priority Date Filing Date
BE431148D BE431148A (de)

Country Status (1)

Country Link
BE (1) BE431148A (de)

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