The satellite-to-ground communications are influenced by ionospheric plasma which varies depending on solar and geomagnetic activities as well as regions and local times. With the expansion of use of the space, continuous monitoring of the ionospheric plasma has become an important issue. In Global Positioning System (GPS), the ionospheric delay, which is proportional to ionospheric total elect...

This is a general review of the existing climatological models of ionospheric radio scintillation for high and equatorial latitudes. Trans-ionospheric communication of radio waves from transmitter to user is affected by the ionosphere which is highly variable and dynamic in both time and space. Scintillation is the term given to irregular amplitude and phase fluctuations of the received signals...

High frequency (HF) radiation from the HAARP and SURA ionospheric heaters transmitted through the underdense ionosphere and received by the WIND satellite show the presence of strong spatial structure in the radiation pattern. A simple model based on the combination of ionospheric irregularities and interference effects has been developed to account for the observations. The analysis demonstrat...

We describe a method for removing ionospheric effects from single-frequency radio data a posteriori. This method is based on a theoretical climatological model developed by the USAF, which returns ne(~r, t) along the line of sight to the source. Together with a model of B⊕, ionospheric delay and Faraday rotation values ensue. If contemporaneous ionospheric data — GPS TEC observations or ionoson...

A method for resolving GPS carrier-phase ambiguities exactly at hundreds of kilometers from the nearest reference site has been tested under a variety of operating conditions, with help from a computed tomography model of the ionosphere. The objective is decimeter-level (root mean square) wide area kinematic positioning in real time using broadcast orbits, and subdecimeter-level positioning usi...