Aerospace Instrument-Making Annotation << Back STATISTICAL CHARACTERISTICS OF ATTENUATION OF OPTICAL PULSE ON THE TERRA-SPACE TRACE V.P. Busygin, A.E. Chernenko, O.I. Kovalevskaya, I.Yu. Kuzmina, Yu.V. Boichenko The field of radiation-cloud optical pulse source formed in space depends on many parameters of atmosphere and underlying surface. Records of all parameters are practically impossible because of their spatial distribution and change in time is usually random and uncontrolled. Therefore, to describe the possible variations in field conditions it is reasonable to apply statistical methods, and determine the coefficients of attenuation of radiation observed as a function of random variables. For implementing this approach, the article develops a statistical model of the atmosphere with the main meteorological elements and their complexes, determining the conditions for radiation transport on the tracks «earth-space». These models are projected on the real conditions of specific locations, taking into account their seasonal and climatic characteristics, or summarized by zoning on a fairly large territory. The basis for constructing of models based on the differential laws of the frequency of occurrence of meteorological elements and their complexes, obtained in primary processing of material airborne sensing of clouds almost over the ten year period in 32 sites of the territory of the former USSR. The volume of material allows for a statistical description of the cloud fields, starting with the one-dimensional distributions and ending with the complexes of the second and third dimension. They include the average water content of the clouds. This allows to obtain for the considered areas the distribution of the optical thickness of the clouds and the transparency coefficient of the atmosphere needed for selection of the threshold and evaluation of detection probability of optical pulses, for example, lightning strokes. Key words: optical pulse, statistical model, distribution function, cloud layer, terra-space trace, flux density, attenuation factor. Contacts: E-mail: adikbu@yandex.ru, E-mail: irkuzmina@bk.ru Pp. 31-52.