| Ultimi arrivi - Mars Reconnaissance Orbiter (MRO) |
Q-pia08014-03-AEB1-full-reduced1.jpgMartian Southern Highlands (3) - HR55 visitenessun commentoMar 25, 2006
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Q-pia08014-02-AEB1-full-reduced1.jpgMartian Southern Highlands (2) - HR55 visitenessun commentoMar 25, 2006
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Q-pia08014-01-AEB1-full-reduced1.jpgMartian Southern Highlands (1) - HR62 visitenessun commentoMar 25, 2006
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PIA08014_modest.jpgThe "First Frame" from MRO (detail mgnf)83 visiteThe scene covers an area 49,8 Km (about 30,9 mi) wide and 23,6 Km (about 11,7 mi) high, of landscape typical of Mars' mid-latitude Southern Highlands. The location is 34° South Latitude, 305° East Longitude. An old, muted crater lies at the middle of the scene, with sets of channels to the left and right. Superimposed on parts of this terrain is a much younger, layered mantle of debris. The debris mantle is smooth in places but rough in other areas where it may have partially sublimated. This suggests that the debris mantle is (or was) rich in volatiles such as ices of water, CO2 or both. Also superimposed on the landscape are many small sharp-rimmed impact craters and wind-blown dunes. This image illustrates processes that may have involved water both on ancient Mars (channels and eroded craters) and much more recently in Mars' history (volatile-rich debris mantle). The radiometric and geometric processing of this image is very preliminary. In particular there are mismatches visible at full resolution along the seams between the 10 side-by-side images from separate CCDs (charge-coupled devices, which are electronic optical sensors). Mar 25, 2006
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PIA08013_modest.jpgThe "First Frame" from MRO100 visiteThis view shows a full-resolution portion of the first image of Mars taken by the High Resolution Imaging Science Experiment camera (HiRISE) on NASA's Mars Reconnaissance Orbiter. The spacecraft, launched Aug. 12, 2005, began orbiting Mars on March 10, 2006. The image is of an area in Mars' mid-latitude Southern Highlands.
HiRISE took this first test image from orbit on March 24, 2006, from an altitude of 2.489 Km (about 1.547 miles), achieving a resolution of 2,49 mt (98" - inches) per pixel, or picture element. The smallest objects of discernable shape are about 3 pixels across. An image acquired at this latitude during the Mars Reconnaissance Orbiter's main science phase, beginning in fall 2006, would be taken from an altitude of about 280 Km (approx. 174 miles) and have a resolution of 28 cm (11") per pixel.
This view covers an area about 4,5 by 2,1 Km (about 1,6 by 1,3 miles).
The quality of this test image is spectacular, with no hint to the eye of any smear or blurring. A high signal-to-noise ratio reveals fine details even in the shadows. Mar 25, 2006
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