Propagación de pulsos transionosféricos de señales de satélites GPS

Abstract

It is known that a completely smooth stratified and deterministic ionospheric profile distorts GPS (Global Positioning System) signals in a way which lirnits geodetic measurements. In the present study we are concerned with single path propagation pulses or wave packets through a smooth horizontally stratified ionospheric plasma. We review the derivation of the ray tracing equations and obtain the group path and the pulse delay time. We use the Penn State MIO Ionospheric model, neglecting the effects of collisions, spherical stratification and irregularities. The selected model describes the step part of the ionospheric layer or the region of the maxirnum electronic density. We obtain explicit expressions, in term of the profiles and numerical results for the pulse delay time.