Vol. 11, no.1, 2019


Olga V. Yushkova, Vyacheslav V. Yushkov, Roman A. Rudamenko, Taisiya N. Dymova
Kotelnikov Institute of Radioengineering and Electronics of RAS, Fryazino branch, http://fire.relarn.ru
Fryazino 141190, Moscow region, Russian Federation

Received 13.03.2019, accepted 29.03.2019
Abstract. In a framework of the Russian project “Luna-Resurs”, the study of the lunar soil using bistatic radio sounding involving the Irkutsk Incoherent Scatter Radar is envisaged. Measurements are planned in the “up link” mode. According to the Fresnel approximation, the region of greatest reflection is defined as a region on the surface whose center is determined from the condition of equality of angles between the normal to the surface and directions from the base of the normal to the receiver and transmitter. The linear dimensions of the reflection region are associated with the Fresnel zones. Measurements are considered optimal if the region of greatest reflection falls within the visibility range of the orbital radar. The distance from the spacecraft to the center of the radio reflection region depends on the ballistic coordinates of the spacecraft, sometimes it equals to 500 kilometers or more, which must be taken into account when experiments are planned. The article presents the derivation of the formula, which determines the optimal time of reception of the reflected signal by the orbital radar for the bistatic location of the Moon in the “up link” mode.

Keywords: bistatic radar, coordinates, reflected spot, the Moon, spacecraft

UDC 523.34-83

RENSIT, 2019, 11(1):13-20 DOI: 10.17725/rensit.2019.11.013

Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/270/11(1)13-20e.pdf