Radiophysical observations of ionosphere disturbances generated by heavy class launch vehicle start

Space vehicles launched at the near-earth orbits are able to cause the disturbances of the near-earth space areas. For purposes of such ionosphere disturbances detection the method of the estimation generalized parameter of ionosphere the relative scattering cross section was developed. It is considered the heavy rocket launch from launch site Baikonur of 25 December 2006. Presented results on investigation of the ionosphere responses to the start of this heavy class launch vehicle with the Kharkiv IS radar observations. Measured dependences of ionosphere plasma scattering cross section and statistical processing results during this event were adduced. Anthropogenic actions related with the human influence into the weather, climate and near-earth space have become comparable with influence of natural processes. Space vehicles launched at the near-earth orbits are also able to cause the disturbances of the near-earth space areas. The artificial disturbances are usually originated due to the energy entry by the rocket propellant combustion at the time of rocket launches and space vehicle orbit corrections, due to the emissions of different matters during space vehicles operation at the orbits and their displacement in the space [1]. The aim of this paper is the account of the results on investigation of the ionosphere responses to the launches of heavy rocket with the Kharkiv IS radar observations. The ionosphere parameters measurements in height region 100-1500 km the most exact and information incoherent scatter method allows to obtain the most fully data about space weather: electron and ion temperature, drift velocity, molecular composition, electron density [2]. In the process of the ionosphere sounding the power spectrum (or autocorrelation function) is directly measured by incoherent scattering facility. To measure the electron density and temperature with error no more than 10-20% it is necessary to accumulate the signal during 10-15 min depending on conditions. Such temporal resolution in the most of cases is unfit for registration of the anthropogenic ionosphere disturbances. For purposes of anthropogenic ionosphere disturbances detection the method of the estimation generalized parameter of ionosphere the relative scattering cross section was developed. For a homogeneous ionosphere this parameter is determined by expression