Spatial distribution of the regolith temperature in the BT crater at different local times. Panels (a)–(c) shows the Diviner-measured brightness temperatures, while panels (d)–(f) shows the corresponding numerical simulation results at approximate times of (a) 08:00, (b) 09:00, (c) 18:20, (d) 07:44, (e) 09:05, and (f) 18:08, used to verify the reliability of the simulation results. Panels (g)–(i) present the temperature differences (panels (a)–(d), (b)–(e), and (c)–(f), respectively). The contour map reflects variations in different elevation values.