Abstract: Influences of the variations of the background solar wind parameters, Alfvenic Mach number M1, plasma β1 value and magnetic field angle 61, on the state and spatial distribution of the magnetic field fluctuations in the Earth's magnetosheath are discussed using the exact solution of MHD shock wave j...
Abstract: In this paper, Doppler shift of radio wave echoes reflected from a spatially slowly, varying ionosphere is discussed. It shows that a moving reflection surface does not necessarily imply a moving medium. The idea which shows the height of equivalent reflection mirror is not necessarily in deviation ...
Abstract: In this paper, based on correlative analysis between observed SPAevents for VLFsignals and the flux density of solar X-ray bursts, a quantitative relation between the flux of the solar X-ray bursts and height variations of the ionosphere at the time of SPAevents is found. From this relation it is po...
Abstract: Meteorological rocket explorations have been successfully conducted for years in our country. Unique data of wind, temperature, density and pressure in middle atmosphere have been obtained. Acomparison of the measured data with the draft of CIRA 1986 is given. The results show that the temperature d...
Abstract: This paper presents a new idea by modelling the high chromosphere of source material of solar energetic particles. Based on the temperature as determined by the data of overabundance of heavy ions relative to local galactic abundances in solar energetic particle events, the high chromosphere is sugg...
Abstract: In this paper, 761 events of LFsky-wave sudden phase anomaly (SPA) during solar flares observed at Wuchang Ionospheric Observatory (30°32'40.6"N, 114°21'21.32"E) are analysed. The characteristic of SPAand a quentitative relation between X-ray fluxes and SPAphenomena of LFsky-wave are further investi...
Abstract: Based on the data of whistle observations at Hefei (37.73°N, 117.15°E, Geograph.; Geomagnetic latitude 20.60°N), the raising factor, absorption coefficient and lifetime of ducts of whistles around sunset are analized and calculated.
Abstract: This paper presents the reduction results of ionosonde data and NNSS measured data at Manzhouli (38.07 mag. lat.) during 1983. The average behaviors and some anomalies of storm-time variations of the ionosphere above Manzhouli are obtained by analysing the critical frequency f0F2 and TEC NT deduced ...
Abstract: In this paper, a phase detection integral method is presented. An attempt is made to analyse the frequency spectra of the backscattering echo using the simple simulation method and to evel ate the coherent accumulative time of the ionospheric backscattering channel.
Abstract: In this paper, a method to determine the radial track of a moving object in HFbackscat-ter study is given. In the method, the minimum time delay curve, the time delay of the signal and the Doppler frequency shift of the moving object are sufficient. There is no need to know the ionospheric character...
Abstract: Data of solar wind speed and geomagnetic disturbances in the 20th solar cycle are statistically compared. There seems to be a similarity of the corotating periodic structure deduced from both sets of data. An autocorrelation analysis of geomagnetic index C9 of 1900-1979 shows that in a fairly long p...
Abstract: Planetary-scale oscillation of the equatorial anomaly is drawn from the ionospheric data in Japan and India. The periods of the oscillations are usually between 2 days and 5 days. The period of 15-20 day oscillation is also observed.
