Analytical method for determining the location of ionospheric and atmospheric layers from radio occultation data

Radio Wave Propagation Phenomena from GPS Occultation Data Analysis

“…In particular, this effect can be caused by the displacement of the centre of spherical symmetry O of an ionospheric part of the ray GTL from the point O (Figure 2). In this case according to the derivation made previously [37] the inequality (37) is also valid after changing the distances …”

“…The radio occultation (RO) method employs the highly-stable radio waves transmitted at two GPS frequencies 1 f  1575.42 MHz and 2 f  1227.60 MHz by the GPS satellites and recorded at a GPS receiver onboard low Earth orbiting (LEO) satellite to remote sense the Earth's ionosphere and neutral atmosphere [4,5,10,11,17,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]46,47,[52][53][54][55][56][59][60][61]. When applied to ionospheric investigations the RO method may be considered as a global tool and can be compared with the global Earth-and space-based radio tomography [42,43].…”

“…A relationship between the derivatives of the phase, eikonal, Doppler frequency on time and intensity of radio waves propagating through the near Earth's space has been detected from both theoretical considerations and experimental analysis of the RO radio-holograms [4,5,31,[36][37][38]47]. The introduced eikonal acceleration technique can de used for locating layers in the ionosphere and atmosphere.…”

“…Parameters m and dps /dt may be evaluated from the orbital data. The first formula (36) has been derived under condition [37]:…”

Numerical Estimation of the Complex Refractive Indexes by the Altitude Depending on Wave Frequency in the Ionized Region of the Earth Atmosphere for Microwaves Information and Power Transmissions

“…), and plasma concentration in the ionosphere region of atmosphere [7][8][9][10][11]. Up to recently, there are a lot of works studying many aspects of ionosphere region such as distribution of electron density, analytical methods, application of the locality principle to radio occultation studies of ionospheric and atmospheric layers from radio occultation data [12,13]. Some other works investigated the measurements from the low-orbit satellite GPS/MET in the atmosphere at 2-35 km altitudes, and these results have been used to obtain global distributions of mesoscale variances of the radio wave refraction index [15,16] and investigate the refractive index effects at low frequency, 12 MHz [17].…”