倔强不能
发表于 2025-3-25 05:41:20
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Comedienne
发表于 2025-3-25 08:13:51
is made up of semi-arid regions (Kirmiz, 1962; Goodall, 1973). The largest deserts occur in North Africa and Asia, whereas the largest proportion of desert land is on the Australian continent. Degree of aridity depends mainly on the intensity and frequency of rainstorms, which usually occur erratic
挥舞
发表于 2025-3-25 15:20:19
Introduction,tudying the structure of the ionosphere and the physics of processes running there) and in various radio applications associated with radio wave propagation (since the ionosphere as a medium of propagation may cause a noticeable effect on the operation of various navigation, location, and communicat
Intractable
发表于 2025-3-25 17:05:32
Ionosphere: Structure and Basic Methods for Radio Sounding and Monitoring,ld exist in the upper atmosphere was first advanced at the end of the nineteenth century first by B. Stewart and then by A. Schuster to explain diurnal variations of the geomagnetic field. However, this hypothesis became widespread only after Heaviside and Kennely explained in 1902
旧石器时代
发表于 2025-3-25 23:26:48
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Palate
发表于 2025-3-26 02:12:42
Inverse Scattering Problems,he equation for one component of the field.,where.is the wave number, .. (.) is the efficient electron collision frequency, .(.) is electron concentration, and the “ion” contribution to the dielectric permittivity may be neglected . The relation for . has the same form both in the SI
corn732
发表于 2025-3-26 06:03:54
Diffraction Radio Tomography of Ionospheric Irregularities,ographic reconstruction, i.e., the problem of reconstructing an object from its projections. Achievements in X-ray tomography in recent decades have been responsible for the intense development of tomographic techniques for recovering the structure of nonuniform objects. Reconstruction algorithms ap
BILK
发表于 2025-3-26 10:43:11
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probate
发表于 2025-3-26 14:54:25
Further Development of Tomographic Methods,e receiving systems makes it possible to sound the ionosphere in the satellite-to-satellite direction and allows obtaining information about the ionosphere over a set of quasi-tangential rays. In particular, nowadays, most promising for ionospheric and atmospheric investigations are the systems moun
pacific
发表于 2025-3-26 18:10:01
Summary,aph; experimental results are shown to illustrate the possibilities of tomo-graphic approaches. The theoretical methods developed and the software and special equipment designed for RT investigations made an essential base for practical realization of satellite RT of the ionosphere.