الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
Particulate matter (aerosol) can be distinguished on the ”bases of its size and also with respect to its chemical composition. These properties have great effect on the light scattering, visibility and climate.
In the present thesis, the technique used for determination
the aerosol size distribution is the measurement of the
jf extinction coefficient in a slant path at different
wavelengths predetermined by eigenanalysis technique. Measurements are inverted to obtain the aerosol size v distribution.
The practical part in this thesis can be divided into two main sections:
Pirst section; V/e determined the information content for each measurement at certain wavelenth, and determined the required measurements number. V/e found;
(1) At least, four measurements on the visible range of light and infrared range ire needed to determine the aerosol size distribution for radius range from 0.01 to
(2) Five measurements are needed to know the distribution of larger particle radii, with extension of measurement further in infrared range. It is found that the fifth Measurement contribute by less than 1% of the information .content. Therefore, four measurements is sufficient to l-retrieve 995» of the information content.