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).
Nearest major airport to Florida Keys: The closest major airport to Florida Keys is Key West International Airport (EYW / KEYW). This airport is in Key West, Florida and is 49 miles from the center of Florida Keys. If you're looking for domestic flights to EYW, check the airlines that fly to EYW.