Quantitative analyses of complexity and nonlinear trend of radio refractivity gradient in the troposphere

摘要: Abstract In this paper, the complexity and nonlinear trends of Radio Refractivity Gradient (RRG) in troposphere over selected locations Nigeria are analyzed discussed extensively. The RRG is an important parameter estimating path clearance propagation effects such as ducting, surface reflection multi-path on terrestrial line of-sights links. Also, radio wave signal propagating affected by unpredictability a weather condition which includes variations meteorological parameters temperature, pressure relative humidity. complex state atmosphere, medium for transmission signals tend to have very strong influence scintillation, e.t.c quality signal, amplitude phase. Variations also induce refractive index atmosphere in-turn results effect known refractivity. For effective prediction modeling propagation, one should be able characterize nature predictability computed information. Chaotic Quantifiers (CQ) Phase Plot Reconstruction (PPR), Average Mutual Information (AMI), False Nearest Neighbor (FNN), Recurrence (RP) Quantification Analyses (RQA) used assess RRG. information reveal, however, based techniques, design frequency planning microwave networks may useful optimum performances during atmospheric turbulence.