'Best' is a pretty meaningless term.
Best in terms of what?
Speed of transmission?
Security/reliability?
Cost?
Battery life?
I'd probably recommend cellular, but a simple laser bounced off low cloud could be the right answer.
'Best' is a pretty meaningless term.
Best in terms of what?
Speed of transmission?
Security/reliability?
Cost?
Battery life?
I'd probably recommend cellular, but a simple laser bounced off low cloud could be the right answer.