Mosaic of PCAM images in a ring, including the inner and outer rings. (a) Site 7. The red numbers denote the locations of the images labeled from 1 to 56. The locations are the same among the three mosaics. (b) Site 6. The shadow of the PCAM at location 34 is the OE region, and abnormal bright regions at locations 7–12 were influenced by abnormal reflections at large phase angles. (c) Site 7. Locations 50 and 51 represent the OE region, while locations 19–22 are at large phase angles. (d) Site 8. There is no major OE region, with locations 25–28 slightly influenced by abnormal reflections.