Comparison of the disk-resolved lunar data with the modeling results. Top: radiance I of the lunar disk at 3.77µm measured on July 25, 2018, with the GF-4 satellite. Bottom: radiance of the lunar disk simulated with our model. The arrows indicate the horizontal sampling profiles 25_R1–25_R4 and the vertical sampling profiles 25_C1–25_C4. The subsolar point (gray circle) and the subcamera point (black circle) are given in Table 1.