APPARATUS FOR THE MEASUREMENT OF THE POINT OF VISIBILITY

APPAREIL DE MESURE DU POINT DE VISIBILITE

THIS APPARATUS, WHICH HAS BEEN STUDIED AND DEVELOPED BY THE RADAR DIVISION OF PLESSEY, MEASURES THE POINT OF VISIBILITY OF AN OBJECT AND IS INTENDED FOR THE DETERMINATION OF THE THICKNESS OF FOG AT A GIVEN POINT. THE PVM IS USEFUL FOR INSTALLATIONS AND SYSTEMS LOCATED IN EXPOSED ENVIRONMENTS SUCH AS THE EDGES OF HIGHWAYS AND MOTORWAYS, RAILWAYS, RUNWAYS, TAXIWAYS OF AIRFIELDS OR ALONG ROWS OF ILLUMINATED BUOYS MARKING OUT NAVIGABLE WATERWAYS. IT MAY ALSO BE UTILIZED AS A SENSOR IN THE INTERIOR OF AUTOMATIC METEOROLOGICAL STATIONS. IT USES THE DIRECT RELATIONSHIP WHICH EXISTS BETWEEN THE COEFFICIENT OF EXTINCTION AND THE RELATIVE INTENSITY OF DIFFUSED LIGHT FOLLOWING A PARTICULAR ANGLE.

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01296820
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:06AM