#Nasa images full

Note that the long edges of THEMIS color images typically contain color artifacts that do not represent surface variation. Nevertheless, the color variation that does appear is representative of some change in color, however subtle, in the actual scene. Also, because each single-filter image is contrast enhanced before inclusion in the three-color image, the apparent color variation of the scene is exaggerated.

#Nasa images full

Because the THEMIS color filters don't span the full range of colors seen by the human eye, a color THEMIS image does not represent true color. These three images are then combined to produce a full color, single image. Each is contrast enhanced and then converted to a red, green, or blue intensity image. To make a color image, three of the five filter images (each in grayscale) are selected. In this mode of operation, the spatial resolution and coverage of the image must be reduced to accommodate the additional data volume produced from using multiple filters. The THEMIS VIS camera is capable of capturing color images of the Martian surface using five different color filters. The Arsia Mons summit caldera is larger than many volcanoes on Earth. These calderas are produced by massive volcanic explosions and collapse. A large volcanic crater known as a caldera is located at the summit of all of the Tharsis volcanoes. From its base on the sea floor, Mauna Loa measures only 6.3 miles high and 75 miles in diameter. For comparison, the largest volcano on Earth is Mauna Loa.

It is 270 miles (450km) in diameter, almost 12 miles (20km) high, and the summit caldera is 72 miles (120km) wide. This VIS image shows part of the eastern flank of Arsia Mons, west of the aligned fracture system.Īrsia Mons is the southernmost of the Tharsis volcanoes. This alignment may indicate a large fracture/vent system was responsible for the eruptions that formed all three volcanoes. There are collapse features on all three volcanoes, on the southwestern and northeastern flanks. The three large aligned Tharsis volcanoes are Arsia Mons, Pavonis Mons and Ascreaus Mons (from south to north). Today's false color image shows part of the flank of Arsia Mons. These false color images may reveal subtle variations of the surface not easily identified in a single band image. The data from different filters can be combined in multiple ways to create a false color image. The THEMIS VIS camera contains 5 filters.