Abstract: The aerostat powered by solar energy is a feasible method for longduration exploration of the surface of Venus. To address the lack of a model for calculating the intensity of solar radiation on the surface of Venus and the power generated by solar cells for the design of the Venus Floater, empirical formulas for the atmospheric transmittance at the Venusian surface at various altitudes are derived from polynomial fitting based on the downward solar radiation flux data measured at different altitudes by the Pioneer Venus Multiprobe. Drawing on the power generation calculation models of photovoltaic cells on Earth, a model for calculating the solar radiation flux on the surface of Venus and the power generation of photovoltaic cells has been established. This model enables rapid and precise simulation of solar irradiance at different altitudes in Venus's complex atmospheric environment. The model is then used to simulate the intensity of solar radiation at altitudes from 0 to 70km in the 0° latitude region of Venus and the solar cell power generation of the Venus Explorer (VE) at altitudes of 0km and 20km on the surface of Venus. The impact of various factors, including date, geographical latitude, flight altitude, and flight attitude, on the power generation of photovoltaic cells is analyzed, which can guide the design of energy systems and the layout of photovoltaic cells for Venus surface aerostats.

Key words: Venus, solar irradiance, solar cell power generation, polynomial fitting, simulation analysis