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179.694  Articles
1 of 17.970 pages  |  10  records  |  more records»
We improve the conventional multi-quasi-parabolic (MQP) model and develop two MQP models with EF-valley by applying the predicted EF-valley parameter of the newest version of the International Reference Ionosphere. On the basis of the conventional MQP mod... see more

In order to study in the field of the dynamics and continuous variations in the ionosphere, the ionospheric measurement tools such as ionosondes, incoherent scatter radars, satellites, and Global Positioning System (GPS) networks should be used. Total Ele... see more

Recently an increasing number of topside electron density profiles has been made available to the scientific communityon the Internet. These data are important for ionospheric modeling purposes, since the experimental informationon the electron density ab... see more

The single layer model of GPS ionospheric data processing is compared with the International Reference Ionosphere í 1990 and the attached Diffusive Equilibrium model of Plasmasphere (IRI-90+DEP) which proved to be a good supplement to GPS data processing.... see more

The present study discusses and compares the IRI and DGR ionospheric models using N(h) profiles obtained during a high solar activity period at South Uist ionosonde station. After inversion, N(h) profiles obtained from ionograms at South Uist have been co... see more

Although the Klobuchar model is widely used in single-frequency GPS receivers, it cannot effectively correct the ionospheric delay. The Klobuchar model sets the night ionospheric delay as a constant, i.e., it cannot reflect temporal changes at night. The ... see more

The article describes the ways to reduce the ionospheric error’s component of the time-frequency synchronization which is used in the algorithm of general coverage (AGC) single-frequency GPS-like signals which are emitted by geostationary satellites of SB... see more

Topside ionospheric parameters-total ion density (Ni) and ion temperature (Ti) have been analysed at low latitude region with changing solar activity (years 1999 to 2003). The Ni and Ti data collected from ROCSAT-1 satellite has been compared with the est... see more

Abstract - Topside ionospheric parameters- total ion density (Ni) and ion temperature (Ti) have been analysed at low latitude region with changing solar activity (years 1999 to 2003). The Ni and Ti data collected from ROCSAT-1 satellite has been compared ... see more

1 of 17.970 pages  |  10  records  |  more records»