000	02104nam  2200373zi 4500
001	9.892127
003	CaOODSP
005	20221107173100
006	m     o  d f
007	cr |n|||||||||
008	201005s1992    oncd    ob   f|0| 0 eng d
040	|aCaOODSP|beng|erda|cCaOODSP
043	|an-cn---
086	1 |aCo24-3/7-92-001E-PDF
100	1 |aChow, S.M., |eauthor.
245	10|aPropagation characteristics of radio waves in potash tunnels and its impact on radio systems / |cby S.M. Chow.
264	1|aOttawa : |bDepartment of Communications, |c1992.
300	|a1 online resource (15 pages) : |bcharts.
336	|atext|btxt|2rdacontent
337	|acomputer|bc|2rdamedia
338	|aonline resource|bcr|2rdacarrier
490	1 |aCRC report ; |vCRC-RP-92-001
500	|aDigitized edition from print [produced by Innovation, Science and Economic Development Canada].
500	|a"July 1992."
504	|aIncludes bibliographical references (page 7).
520	|a"This report shows that radio waves at about 900 MHz can propagate in the tunnels of a potash mine with low loss and low multipath distortion. These results were first derived using a theoretical model and were later confirmed by measurements. The attenuation of radio waves per unit distance in a potash tunnel within this frequency band is less than the attenuation in a coaxial cable. This result is important because many commercial systems such as cellular radio, radio LANs and personal communication systems operate in this frequency band and can be adapted to work in a potash mine, replacing the more expensive leaky feeder systems used in other types of underground mines"--Abstract.
650	0|aRadio wave propagation.
650	0|aPotash.
650	6|aOndes radioélectriques|xPropagation.
650	6|aPotasse.
710	1 |aCanada. |bDepartment of Communications, |eissuing body.
830	#0|aCRC report ;|vCRC-RP-92-001.|w(CaOODSP)9.882492
856	40|qPDF|s1.47 MB|uhttps://publications.gc.ca/collections/collection_2020/isde-ised/Co24/Co24-3-7-92-001-eng.pdf