Fig. 6
From: Multi-wavelength global maps of Jupiter and Saturn using Cassini imaging system data
Saturn’s global map displaying the best spatial coverage. The raw ISS images used to create this global map were captured by the ISS MT2 filter (~727 nm) on October 23, 2009. These raw images have a spatial resolution of ~149 km/pixel. The global map is composed of 11 raw images. Typically, we require 5–8 images with good spatial coverage to construct a global map. In this case, we have selected images taken around the equinox to achieve optimal global coverage. However, the ISS recorded these images around the NH Spring Equinox at a high phase angle of ~110 degrees. This high phase angle results in relatively small sun-illuminated areas per image, spanning ~30–40 degrees in longitude. Therefore, we must combine 11 images to cover the entire longitude range from 0 to 360 degrees.
