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Again, most ground is covered by vegetation, so you can't see through that either.


Yes, we can. We can't see through trees, but anything shorter than 10 feet in height we can get directly through, and even in cases of slightly taller vegetation we can correct by eliminating various absorption and emission lines in filters.

What we really can't see through is smoke and cloud.

Note: I maintain the Google Earth-based datasets for the USGS ASTER and LANDSAT7/8-based surficial mineralogy program. That includes actually going out to various locations and verifying signal readings. I've done this since 2016 as an unpaid volunteer (its pays me due to the minerals I'll find.)




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