Anticipated Super-Refraction Over India, Based on the Climatology of the Vertical Structure of Radio Refractivity


  • K. Chatterjee


From the monthly average values of radiorefractivity near the ground surface and at the 850-mb level (approximately 5000 ft above sea level), values of refractive index gradient have been computed between ground surface and 5000 ft above sea level for the 12 Indian radiosonde stations. These values of N gradients have been examined to estimate super-refraction of radio waves in the lower troposphere over India. Maps showing isopleths of refractive index gradient over the country during different seasons are also presented.