Global Satellite Meteorological Observation (GSMO) Theory by Stojče Dimov Ilčev

Author:Stojče Dimov Ilčev
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(4.15)

where α is multiplying factor. The transition from E2 to a lower value E1 is driven by two processes: first, the spontaneous emission of a photon and, second, the emission induced by the absorption of the incident radiation I. Thus, the transition probability P 2→1 is therefore composed of two terms: the first one is proportional to the number of molecules at state E2 while the second one is proportional to I.

(4.16)

where first relation before + is inducted emission and second relation after + is spontaneous emission, with β and γ two multiplying factors. In such a way, at equilibrium, P1→2 = P2→1, so that the number of molecules at a given energy level is constant. The incident radiation is exactly the emitted radiation and satisfies as follows:

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