Density Altitude
From WindsportAtlanta.com: Wiki
Description
Pressure Altitude is the height above a standard datum plane (SDP), which is a theoretical level where the weight of the atmosphere is 29.92 "Hg (1,013.2 mb) as measured by a barometer
Effect
Sources and Links
https://airdensityonline.com/track-results/Road_Atlanta/ https://airdensityonline.com/track-history/Road_Atlanta/yesterday https://www.weather.gov/epz/wxcalc_densityaltitude https://en.wikipedia.org/wiki/Density_altitude https://en.wikipedia.org/wiki/Pressure_altitude