When designing aircraft for agriculture, all calculations are carried out for the International Standard Atmosphere (ISA) conditions, which makes it possible to compare the results of calculations and flight tests of several aircraft conducted in different climatic zones by recalculating the test results to the parameters of the International Standard Atmosphere, “placing” all aircraft in the same conditions - ISA conditions. Historically, the materials for the development of international standards in the field of ISA were developed in the USSR and formed the basis of international standards ISO, which in turn became the basis of documents ICAO 7488/3 of the International Civil Aviation Organisation (ICAO) and subsequently became state documents on standardisation identical to international standards ISO. The above works were carried out within the framework of the international technical subcommittee on standardisation ISO/TC 20/SC 6 “standard atmosphere”, formed in 1980 as part of the international standardisation body ISO/TC 20/SC 6 “standard atmosphere”. Standardisation is the basis for the unity of measurements. In the Russian Federation, the technical committee on standardisation TC 484 “Standard Atmosphere” was established. The developed model of the International Standard Atmosphere allows us to compare the results of calculations and flight tests of several aircrafts conducted in different climatic zones by recalculating the test results to the parameters of the International Standard Atmosphere, “placing” all aircrafts in the same conditions - ISA conditions. With the development of aviation and space technology, the list of atmospheric parameters subject to normalisation and standardisation is expanding.
