Search academic texts

Information × Registration Number 0219U003670, 0117U004868 , R & D reports Title The development of the global semi-empirical model of the electron density of the ionosphere at the current time popup.stage_title Head Rozumenko Viktor, Registration Date 07-02-2019 Organization Kharkov National University named after V.N. Karazin popup.description2 The stage aim: to verify the empirical real time ionosphere model, Ukraine 2013, based on observation data; comprehensive study of ionospheric disturbances generated by precipitation of energetic particles in the magnetospheric cusp, earthquakes, volcano eruptions, the fall of large meteorites; to develop empirical model of disturbance source. Comprehensive study of prediction errors of the TID temporal quasi-half periods generated by the local source of energy and momentum releases were carried out by using data collected from ten ionosonde spaced apart in the range of 1000 km - 4000 km. It was established that the forecast errors of the temporal quasi half-periods are about 6%; the errors do not depend upon the explosion energy (in the range 1 Mt TNT - 58 Mt TNT), the latitude and height of source locations, and other heliogeophysical conditions during measurements. A new ground-based method for diagnosing temporal quasi periods of acoustic-gravity waves (AGW) based on the registration of geomagnetic pulsation is developed. This method can be used for studying neutral atmosphere heterogeneity and for establishing relations between the AGW and TID parameters: spatial and temporal periods, life time, and time delay between propagating AGW and TID, etc. Application of this approach allows us do not use any predefined relations between the AGW and TID parameters. The data of ionosphere sounding collected by using ionosphere sounding from the board of low-orbital satellites obtained at V. N. Karazin Khariv National University for a long period under different heliogeophysical conditions, have shown that relative TID amplitudes are proportional to length of the TID spatial half-periods. This empirical dependence was analyzed under various levels of solar and magnetic activities. The results of the work can be used by geophysicists to monitor the ionospheric perturbations, as well as for further study of the AGW TID relation. Product Description popup.authors Дорохов В.Л. Загвоздкіна Н.Н. Милованов Ю.Б. Милованова Л.І. Набока А.М. Сомов В.Г. Федоренко Ю.П. popup.nrat_date 2020-04-02 Close