REFRACTIVITY AND HUMIDITY PROFILING USING MICROWAVE RADIOMETER OBSERVATION AND INTERFERENCE OF RADIO DUCTS
Authors: *Ojo O.A, Oluwafisoye P.A, Akintola B.O
Refractivity and humidity profile change with time has visible effect on signal to noise ratio (SNR). Such effects can be stretching, shifting of pattern with time or over elevation angle. This study was aimed at using microwave radiometer observation and interference of radio ducts to analyze the effects of refractivity and humidity profiling, by considering the SNR. Indeed, this effect can be roughly quantified via an additional phase shift between carriers of the direct and reflected waves which would lead to a shift in the phase of the modulation pattern. The method used for implementing this research work involved getting radiometer data from the National space research and development agency (NASRDA). At varying altitude ranges, the humidity profile in millimetre (mm) was 378.0, 368.58, 357.57, 374.0, 329.0, 293.0 and 780.0 which corresponded to the radio ducts 0.21522, 0.13255, 0.16339, 0.15879, 0.12795, 0.11549 and 0.18045 in metre (m).
Affiliations: Department of Physics with Electronics, Osun State University Osogbo, Osun State, Nigeria
Keywords: Humidity, Modulation, Waves, Radiometer, Refractivity
Published date: 2017/06/30