From Newsgroup: sci.geo.satellite-nav

https://groups.google.com/g/sci.geo.satellite-nav
Google Groups no longer supports new Usenet posts or subscriptions.
Historical content remains viewable.

An updated web-searchable no-login web-search archive that reports a unique
URL will need to be located that allows people to search before posting to
the s.g.s-n. newsgroup & which allows unique references to recent articles.
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You can probably safely remove your Google Groups filters now.
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