Abstract: The atmospheric refractive index structure constant near ground in gobi region was measured by using the large aperture scintillometer and the micro-thermal meter at the same time. The results show that there was a good correlation between the values of atmospheric refractive index structure constant by two kinds of instruments with the Pearson correlation coefficient up to 0.68. The measuring result by the large aperture scintillometer can show the diurnal variation character near ground in gobi region, and it was consistent with that by the micro-thermal meter. However, the measured values by the large aperture scintillometer were almost bigger in magnitude than by the micro-thermal meter because of different measurement factors.

Key words: atmospheric optics, atmospheric refractive index structure constant, large aperture scintillometer(LAS), micro-thermal meter