RETRIEVAL AND ANALYSIS OF ATMOSPHERIC REFRACTIVE INDEX USING A UV ROTATIONAL RAMAN LIDAR OBSERVATION

The atmospheric refractive index is an important factor affecting the measurement accuracy in the field of photoelectric detection. By using the atmospheric temperature profile measured by the ultraviolet rotational Raman lidar to invert the atmospheric refractive index profile, the results show that the vertical profile of the refractive index inverted by the ultraviolet rotational Raman lidar is in good agreement with the results inverted by the radiosonde, with a relative error of 2.4% within 10km. Under the standard atmospheric condition, the refractive index changes by -1.03 when the temperature increases by 1 K; the refractive index changes by 2.98 when the pressure increases by 1kPa; the refractive index of the atmosphere changes only -0.41, with a relative change of -0.14% when the water vapor pressure increases by 1kPa. The analysis results of this paper provide a theoretical basis for selecting the appropriate inversion formula for the atmospheric refractive index.