There has to be a way to get some satellite observations.

Such a plant, if built or started, could not be concealed from satellite observation.

"Compared to satellite observations over the past ten years, I suppose."

No attempt was being made to hide any of this activity from satellite observation.

But satellite observations show that it is about 100 times greater at around 10 tesla.

Satellite observations that started in 1979 failed to see any warming trend.

This is a relevant quantity for comparison with satellite observations.

But, even in the days of satellite observations, it will remain hard to know exactly what is going on deep in the forest.

Maybe it was picked up by satellite observation far out in space, monitored for days or weeks.

Is this city and the surrounding countryside under satellite observation?