True. Any sufficiently advanced technology is indistingushable from magic. --
Arthur C. Clark. But science can exlain how satellites and ground penetrating radar or evening gravimetric density changes to identiffy deep features work. And they can be demonstrated repeatably in controlled or natural conditions using the scientific method. NONE will find a chest sized object and they cost millions of dollars to construct and place; especially in orbit. They have circuits that connect to other circuits and don't rely on how you hold your tongue.
Science begins with "I don't know" and never really ends.
But you should contact the Air Force. They have to drop a surface probe first to find a bunker 200 ft underground. Could lead to a military advantage if you know of a 300 ft penetrating system that will identify man-made sized features under soil/rock.
https://apps.dtic.mil/dtic/tr/fulltext/u2/a447502.pdf