N4OGW said:
"What is usually used is the 'Slingram method'."
Thanks for mentioning this, Tor. Quite a bit of research seems to have
been done on the method. A good search term for HF devices is
HFEMI sensor
Here's an article about correcting errors in a configuration that uses a
VNA:
https://tinyurl.com/4naansm3
Several articles mention the detection of unexploded ordinance. An
unexpected bonus when you measure the ground constants of your back yard.
Brian
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