Humidity Contribution Analysis To Cn~2 On Surface Layer In The Area Of Cobi

Atmospheric turbulence is a disorderly and ruleless development of atmosphere. Itdirectly influences the laser beam gualing and propagation effect in the atmosphere.The development of atmospheric turbulence is also affected by many meteorologicfactors such as temperature,humidity,atmospheric pressure and wind speed. It's wellknown that temperature has a significant effect on the movement of atmosphericturbulence and make a dominant effect. This thesis analyzes the relationships betweenthe meteorologic factors such as temperature,humidity,atmospheric pressure andwind speed and the atmospheric optical parameters such as atmospheric turbulencemeasured surface layer,atmospheric coherence length emphasizing research of theeffect of humidity on atmospheric turbulence. The main works as follows:(1) Based on scientific analysis and demonstration, we ascertain the atmosphericoptical parameters minimum deviation on different measure location and differentinterval. The maximum coherence be keeped on different atmospheric opticalparameters. An atmospheric optical parameters database has been built based on thecorresponding measure time. Relying on the discriminate criterion of atmosphericoptical parameter on surface layer and deleting some fault data, the foundation forfurther research is built;(2) On the foundation of the atmospheric optical parameter database, with adifferent view about time and humidity fluctuation, we analyze the relationship thehumidity fluctuation and the atmospheric turbulence and the atmospheric coherencelength measured on surface layer. We present the process module via atmosphericcoherence length to retrieve the atmospheric turbulence measured on surface layer andthe corresponding analysis module;(3) We set up the process module about via meteorological factors such astemperature,humidity,atmospheric pressure and wind speed to retrieve the atmosphericturbulence measured on surface layer(namely the polynomial simulating the Cn2module). On condition of different humidity, we retrieve the atmospheric turbulenceparameter on surface layer by the invariable meteorological elements and analyze theinterrelationship of the different turbulence parameters on surface layer on the theory oftemperature fluctuations method. According to the corresponding relation between themeasured atmospheric turbulence parameter on surface layer and meteorologicalelements, the meteorological element coefficient as temperature,atmospheric pressureand humidity are estimated with least square fitting method. On the condition ofdifferent humidity, the corresponding relation analysis between the turbulenceparameter simulated with updating coefficient polynomial and the turbulence parametermeasured actually has been made;(4) The turbulence model process module on the surface of ocean and ice-snow isset up. Ascertaining the related model parameter or coefficient, the demonstrationanalysis about the calculation process of the humidity structure parameter Cq is analyzedand the retrieving process module is built up. On the condition of different humidity, therelation between the measured and the retrieved atmospheric turbulence parameter isanalyzed. The relation between temperature and humidity is analyzed and the effect to the measured and the retrieved atmospheric turbulence parameter is presented. Underthe similar humidity condition, the effect of wind speed to the measured atmosphericturbulence parameter and the variety of relativity coefficient is discussed.