On The Possibility Of Expanding The Landing Areas Within The Venera-D Project By Selecting Launch Windows

The paper considers the problem of determining accessible landing areas on the surface of Venus and the possibility of expanding them by extending the launch windows in the period from 2026 to 2031, taking into account the constraints on the payload mass and the maximum overload level acting on the lander during descent in the Venusian atmosphere. We used the Venera-D planned mission requirements as the initial data set for our studies. The possibility of reaching the planet on the first and second half-orbits of the heliocentric Earth-Venus transfer orbits was explored. It was confirmed that through the extension of the launch window for 2031 it is possible to broaden the reachable landing areas. The cost of such expanding landing area in terms of payload is presented.