ISA - International Standard Atmosphere
{"Image DocumentName": "ISA - International Standard Atmosphere", "Image ImageDescription": "This derivation is based on a subset of the International Standard Atmosphere (ISA) model formulated by the International Civil Aviation Organization (ICAO). The main assumptions are : hydrostatic equilibrium, perfect gas, gravity independent of altitude, and. constant lapse rate; zero altitude is measured from mean sea level. The ICAO atmospheric model has been updated from time to time and now exists in several versions including the International Standards Organization 1973 and the US Standard Atmosphere The most recent revision of the ISA at the time of writing is due to the ICAO Symbol. Value. Unit. Description. Po Pa. pressure at zero altitude. To K. temperature at zero altitude. g m/s2. acceleration due to gravity. L x K/m. lapse rate. R J/kg K. gas constant for air. Rh. 0 % dimensionless. relative humidity.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}