The analytical approximation of the spatial frequency filtration of radiation fields for the space spectrophotometry problems

Pioneering remote sensing in the USSR. 1. Radiation transfer in the optical wavelength region of the electromagnetic spectrum

“…The first complex international experiment Kursk-1985 was carried out in July 1985 with a campaign of simultaneous observations from Salyut-7, artificial satellites, aircraft and helicopter's campaign (Kondratyev et al 1985, 1986, 1990, 1992, Curran et al 1990, Kozoderov et al 1998. The stages of planning, development and achievements of the various optical experiments from space were published in many monographs, proceedings and thematic books.…”

“…The relevant results were included in their separate monographs (Sobolev 1972, Minin 1988 scattering of radiation for any spherically symmetrical layer, while its multiple scattering was taken into account partly in a diffuse approximation for any plane layer. Oleg Ivanovich Smokty, one of the successors of Kondratyev and Sobolev, has been a leading scientist since the 1960s on theoretical and computational studies on mathematical modelling or computer science as this discipline is called now (Smokty 1967a,b,c, 1969, 1986, Smokty and Fabrikov 1989. These studies were conducted under Kondratyev's leadership.…”

“…He had already published monographs concerning radiation heat exchange (Kondratyev 1954(Kondratyev , 1956). Kondratyev was one of the pioneering organizers of space research, becoming involved in the first space and ground-based experiments associated with space exploration; this included the design and construction of observation systems for remote sensing and satellite meteorology (Kondratyev 1963, 1966, 1971, 1990, Kondratyev et al 1964, 1967, 1972a,g, 1975b, 1976, 1981, 1985, 1986, 1990, 1992…”