Sir,thank u for ur concern,I am trying to calculate mixing height at 14.3252/78.1643, I tried to access Nosa web ecwmf web etc but in vain,I could not get any data.mainly I am looking for radio sonde data,I have wry data in sfc and .pfc files and had run AERMOD,CALPUFF.now I want to evaluate,validate.any suggestions,please