Vegetation is an indispensable feature of most outdoor wireless channel environments. The interaction between radio waves and vegetation has been researched for several decades. Because of the complex structure of the foliage, composed of randomly oriented trunks, branches, twigs and leaves, the involved physical process in the propagation of the radiowave through vegetation is complex. Accurat...

The occurrences of precipitation, also commonly referred as rain, in the form of "convective" and "stratiform" have been identified to exist worldwide. In this study, the radar return echoes or known as reflectivity values acquired from radar scans have been exploited in the process of classifying the type of rain endured. The investigation use radar data from Malaysian Meteorology Department (...

In this data article, analysis of surface refractivity and water vapour density in Southeast, Nigeria were reported. The meteorological data were collected for the period of 39 years between 1973 and 2012 from National Oceanic and Atmospheric Administration (NOAA) Climatology Centre. Five locations considered in the study area includes: Enugu, Onitsha, Abakaliki, Aba and Ihiala. Descriptive sta...

During ERS-1 and ERS-2 missions, the application of synthetic aperture radar interferometry (InSAR) become known as a very important method for topographic mapping and high accuracy surface displacement measurements. Further investigations, however, showed that expected accuracy couldn’t be achieved. It appeared that radiowave propagation through the atmosphere causes significant distortion to ...

Off-shore petroleum exploration nowadays routinely uses the marine controlled-source (MCSEM) survey, which consists of a set of sea-bottom receivers and a moving electrical bipole transmitter. We show that the MCSEM survey with its dense system of transmitters and receivers, is extremely well suited for application of the holography/migration method. The combined EM signal in the receivers form...

We present a comprehensive analysis of natural modes of a planar metamaterial layer (metalayer) formed by arrayed pairs of metallic dogbone-shaped conductors separated by a thin dielectric layer. The in-plane modes are classified based on the symmetric and anti-symmetric current distributions in the pairs. Of particular interest are the anti-symmetric modes, since the anti-symmetric current is ...

Among the open-literature on pulse-position-modulation (PPM) radiowave wireless communications, this work is first to advance a semi-‘blind’/‘blind’ spatial-rake receiver with interference-rejection capability. This proposed adaptive ‘smart antennas’ detector uses the signal-of-interest’s (SOI) earlier decoded information-symbols to segment earlier collected data into two data-groups: one data-...