"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 9, 2018

contents of issue      DOI  10.30898/1684-1719.2018.9.2     full text in Russian (pdf)  

Errors in the determination of electron density in solving the inverse problem of occultation of the Venusian daytime ionosphere

 

A. L. Gavrik

Fryazino Branch of Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Vvedensky Sq.1, Fryazino Moscow region 141190, Russia

 

The paper is received on August 31, 2018

 

Abstract. The analysis of errors in the determination of electron density in the daytime ionosphere of Venus based on the results of radio occultation and an assessment of the prospects for obtaining more accurate information about the properties of its ionosphere from the data of completed and planned missions are presented. The study was performed on the basis of the data of the Venus-9,-10,-15,-16 satellites and the simulation of the occultation experiment. According to the radio occultation experiments of completed missions, the vF2, vF1, vE, vD regions are identified in the daytime ionosphere of Venus, indicating the stratified structure of the ionosphere due to prevailing physical processes that are analogous to the processes in the terrestrial ionosphere layers F2, F1, E, D. Electron density calculations are based on the integration of data distorted by broadband noise. The simulation of the experiment showed that the error in determining the electron density in different regions of the ionosphere is different. The main source of error in the method of radio occultation is interplanetary plasma on the radio communication path if its influence on the parameters of the radio wave significantly exceeds the fluctuations in the amplitude, phase and frequency of the radio wave caused by the limited stability of the equipment and the low energy potential of the radio link. It is established that in the region of vD there will always be a maximum effect of factors that impair the reliability of the information on the ionosphere. To study the processes responsible for dynamic changes in the atmosphere-ionosphere system, it is necessary to increase the energy potential of the radio link in the planned mission of Venera-D. As a result, improved methods of data analysis will allow obtaining new information about Venus with good accuracy.

Keywords: radio wave propagation, occultation of ionosphere, fluctuations in frequency and power of radio waves.

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For citation:
A. L. Gavrik. Errors in the determination of electron density in solving the inverse problem of occultation of the Venusian daytime ionosphere. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 9. Available at http://jre.cplire.ru/jre/sep18/2/text.pdf

DOI  10.30898/1684-1719.2018.9.2