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N. America AM Ground Conductivity Map

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Marcus
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Location: Sarnia, Ontario

N. America AM Ground Conductivity Map

Post by Marcus » Wed Feb 23, 2022 11:40 pm

A good portion of S.W. Ontario is actually a 20. The Canadian shield up north is only about a 2. I like how they included Canada, Mexico, Alaska, and Hawaii instead just focusing on the lower 48 states.

http://www.mediafire.com/file/yjzhtba2u ... p.zip/file



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Ben Zonia
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Re: N. America AM Ground Conductivity Map

Post by Ben Zonia » Thu Feb 24, 2022 12:17 am

Lake St. Clair is 40 on that map.

Inland, in many areas of Michigan, it is much less than M-3. On Long Island, which is 0.5 on M-3, measured radials are way below 0.1, the lowest conductivity on the graph. The radials were near Patchougue, near where Billy Joel grew up, halfway out Long Island.


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k8jd
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Re: N. America AM Ground Conductivity Map

Post by k8jd » Thu Feb 24, 2022 3:23 pm

[*] would like to see the map but my computer can't download it :(



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Ben Zonia
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Re: N. America AM Ground Conductivity Map

Post by Ben Zonia » Fri Feb 25, 2022 12:01 am

Look at the conductivity data for WLIM 1580 Patchogue, NY, on Long Island. M-3 says 0.5 for Long Island. Almost all the readings for WLIM are BELOW the 0.1 mS/m curve in the ground wave chart, and substantially. 0.05 mS/m would fit the data better.

https://licensing.fcc.gov/cdbs/CDBS_Att ... &exhcnum=2


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