Bruce Murray Space Image LibraryPhoenix landing site monitoring from HiRISE: January 6, 2010 Phoenix landing site monitoring from HiRISE: January 6, 2010 As spring comes to Mars, the area is illuminated by a Sun that is a reasonable 30 degrees above the horizon; still, not all of the seasonal carbon dioxide frost has yet sublimated. It is especially concentrated in the topographic lows between the polygonal patterns in the polar soil. NASA / JPL-Caltech / UA / annotations by Emily LakdawallaImage scale is 25 cm/pixel. North is to the left. From HiRISE image ESP_016160_2485.