Term RMS refers to the mathematical Root Mean Square which is an average of peaks and valleys of a materials surface profile. Ra stands for roughness average. Ra is a average of only peaks; therefore, to get an Ra, multiple your 3.2 to 6.3 by 2 to get 6.4 to 12.4 Ra. AF Kenton.
Closest Airport to Siesta Key, FL. The closest airport is Sarasota Bradenton International Airport (SRQ). Distance from Sarasota Bradenton International Airport to Siesta Key is 10,4 kilometers (6,5 miles).
Major airports near Miami, Florida: The nearest major airport is Miami International Airport (MIA / KMIA). This airport has international and domestic flights and is 7 miles from the center of Miami, FL. Another major airport is Fort Lauderdale-Hollywood International Airport (FLL / KFLL), which has international and domestic flights from Fort Lauderdale, Florida and is 25 miles from Miami, FL.