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008251217e19750528oncad   obt  f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-on
0861 |aEn57-58/820-1975E-PDF
1001 |aSheppard, B. E. |q(Brian E.)|eauthor.
24514|aThe development of a prototype ambient light sensor for use in the runway visual range system / |cby Brian Sheppard = Développement du prototype d'un détecteur de la lumière ambiante pour le système de mesure de la portée visuelle de piste / par Brian Sheppard.
24631|aDéveloppement du prototype d'un détecteur de la lumière ambiante pour le système de mesure de la portée visuelle de piste
264 1|aDownsview, Ontario : |bEnvironment Canada, Atmospheric Environment Service, |c28 May 1975.
300 |a1 online resource (36 pages, 2 unnumbered pages) : |billustrations, graphs.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aTechnical memoranda, |x0708-2878 ; |vTEC 820
500 |aISSN of series supplied from ISSN Portal. Incorrect ISSN (0068-7804) printed in this publication.
500 |aDigitized edition from print [produced by Environment and Climate Change Canada].
504 |aIncludes bibliographical references (page 15).
5203 |a"This technical memorandum describes the development of a prototype ambient light sensor for use in the runway visual range (RVR) system. We review the definition and the computation of RVR. We compare the values of the ambient light related RVR parameters used in Canada with those used by other nations. The advantage of a continuous or multi-level ambient light measurement is considered. The results of laboratory and field tests of photovoltaic cells and photoresistors are compared with the basic sensor performance requirements for such continuous or multi-level light measurements. A circuit using a photoresistor as detector was constructed, calibrated and installed for evaluation at Toronto International Airport"--Abstract.
546 |aIncludes abstracts in English and French.
650 0|aVisibility|xMeasurement|xInstruments|xCalibration.
650 0|aAirports|xVisibility|zOntario|zToronto.
650 6|aVisibilité|xMesure|xInstruments|xÉtalonnage.
650 6|aVisibilité sur les aéroports|zOntario|zToronto.
655 7|aTechnical reports|2lcgft
655 7|aRapports techniques|2rvmgf
7101 |aCanada. |bAtmospheric Environment Service, |eissuing body.
830#0|aTechnical memoranda (Canada. Atmospheric Environment Service)|x0708-2878 ; |vTEC 820.|w(CaOODSP)9.934501
85640|qPDF|s1.41 MB|uhttps://publications.gc.ca/collections/collection_2025/eccc/en57/En57-58-820-1975-eng.pdf
986 |aUDC 551.508.92|a672672428