What does RIO stand for?
RIO stands for "Relative Ionospheric Opacity"
How to abbreviate "Relative Ionospheric Opacity"?
"Relative Ionospheric Opacity" can be abbreviated as RIO
What is the meaning of RIO abbreviation?
The meaning of RIO abbreviation is "Relative Ionospheric Opacity"
What does RIO mean?
RIO as abbreviation means "Relative Ionospheric Opacity"
