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. Author manuscript; available in PMC: 2018 Apr 5.
Published in final edited form as: J Geophys Res Planets. 2016 Sep 8;121(9):1814–1826. doi: 10.1002/2016JE005122

Figure 2.

Figure 2

Same as in Figure 1 except for the NH maps in 2013, 2014, and 2015. The NH maps in 2014 and 2015 are built with five and six ISS raw images, respectively. The 2013 NH map was built with 14 images with relatively small spatial coverage, and the resulting map has large observational gaps.