研究目的
Investigating the illumination conditions at Titan’s surface to understand the environment for future in situ missions, specifically the Dragon?y Titan lander.
研究成果
Significant twilight illumination exists on Titan's surface, enabling imaging up to 30° beyond the terminator. Nighttime imaging is feasible for stationary landers with long exposure times but may be challenging for floating platforms. Titan's sunsets are less dramatic at visible wavelengths due to high atmospheric scattering. The study provides insights for designing future Titan missions, especially the Dragon?y lander.
研究不足
The model does not treat refraction or polarization, and neglects Rayleigh scattering and gaseous absorption within the atmosphere. The atmospheric parameters are based on Huygens measurements, which may not fully represent Titan's atmospheric variability.
1：Experimental Design and Method Selection:
Utilized the Monte Carlo radiative transfer model SRTC++ for three-dimensional spherical calculations of photon trajectories through Titan's atmosphere and surface.
2：Sample Selection and Data Sources:
Assumed a Tomasko et al. (2008b) Titan atmosphere model with modifications for single-scattering albedos at wavelengths less than
3：9 μm and longer than 9 μm. List of Experimental Equipment and Materials:
SRTC++ model, Titan atmospheric parameters from Huygens measurements.
4：Experimental Procedures and Operational Workflow:
Tracked photon trajectories and recorded intensity at the surface as a function of solar incidence angle.
5：Data Analysis Methods:
Analyzed surface illumination as a function of solar incidence angle and wavelength, comparing to Earth's Moon illumination.
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