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).
Sarasota Bradenton International Airport (SRQ) located about 11 miles north, 25 minute drive. Tampa International Airport (TPA) located about 70 miles north, 1 hour, 20 minute drive. Southwest Florida International Airport (RSW) located about 84 miles south in Fort Myers, Florida. 1 hour, 40 minute drive.