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).
The airport is in an unincorporated area in Miami-Dade County, Florida, eight miles (13 km) northwest of Downtown Miami, in metropolitan Miami, between the cities of Miami, Hialeah, Doral, Miami Springs, the village of Virginia Gardens, and the unincorporated Fontainebleau neighborhood.