Fundamentals of Numerical Modeling of the Mid-latitude Ionosphere

Mid-latitude Vertical Transmission of Geomagnetic Micropulsations through the Ionosphere

Type-1 echoes from the mid-latitude E-Region ionosphere

This paper presents more data on the properties of type-1 irregularities in the nighttime midlatitude E-region ionosphere. The measurements were made with a 50-MHz Doppler radar system operating in Crete, Greece. The type-1 echoes last from several seconds to a few minutes and are characterized by narrow Doppler spectra with peaks corresponding to wave phase velocities of 250–350 m/s. The avera...

Characterisation of Narrowband HF Channels in the Mid and Low Latitude Ionosphere

The performance of an HF digital radio system is strongly affected by the response of its various protocols to short-term (sub-hourly) variations in the ionosphere. There is a very limited choice of models of this variation. Channel simulators based on the Watterson 2-path model (ITU-R F.1487) are commonly relied upon for modem testing, system design and modelling. Limited DSTO trials in the pa...

analysis of reading comprehension needs of the students of paramedical studies: the case of the students of health information management (him)

چکیده ندارد.

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...