| Ultimi arrivi - Mars through Mars Express (ESA - Original Raw Frames & Orbital Panoramas) |
Craters-Terby_Crater.jpgTerby Crater (Natural Colors + MULTISPECTRUM; credits: ESA & Lunexit)57 visiteThe High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express Orbiter imaged the Terby Crater on Mars on 13 April 2007 during orbit 4199.
The Region is of great scientific interest as sediments there hold information on the role of water in the history of the Planet. Eye-catching finger-shaped plateaux extend in the North-South direction. They rise up to 2000 mt above the surrounding terrain. The relatively old crater was filled with sediments in the past, which formed plateaux on erosion.
The flanks of the plateaux clearly exhibit layering of different-coloured material. Differences in colour usually indicate changes in the composition of the material and such layering is called ‘bedding’. Bedding structures are typical of sedimentary rock, which has been deposited either by wind or water. Different rock layers erode differently, forming terraces.
The valleys exhibit gullies, or channels cut in the ground by running liquid, mainly in the Northern part of the image.
These gullies and the rock-bedding structure indicate that the region has been affected by water.
MareKromiumApr 05, 2008
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Craters-Unnamed_Double_Crater_in_Terra_Tyrrhena.jpgDouble Impact Crater in Terra Tyrrhena (Natural Colors + MULTISPECTRUM; credits: ESA & Lunexit)57 visiteThe High Resolution Stereo Camera (HRSC), ESA’s Mars Express obtained images of the Tyrrhena Terra Impact Region on Mars.
On 10 May 2007, the spacecraft was in orbit number 4294 when it snapped pictures of the Region located at 18° South Lat. and 99° East Long. with a ground resolution of approximately 15 metres per pixel.
The Western part of the scene is dominated by a 35 Km-wide and approx. 1000 mt-deep impact crater with an extremely cliffy and chiseled edge. Another, 18 Km-long and approx. 750 mt-deep impact crater, in all likelihood a ‘double impact crater’, is located South of the large crater.
These 'double impact craters' develop when two objects, part of a binary, hit the surface almost simultaneously.MareKromiumApr 05, 2008
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Volcanoes-Olympus_Mons-PCF-LXTT.jpgOlympus Mons and Surroundings (Absolute Natural Colors; credits for the additional process. and color: Dr Paolo C. Fienga - Lunexit Team)57 visiteUna nostra elaborazione Multispettrale del maestoso Vulcano Olympus, ottenuta da un frame HR proveniente dalla Sonda ESA "Mars Express".
Caption ESA:"This is a mosaic of Olympus Mons, the highest volcano on Mars, which towers 26 Km above the surrounding plains. The image covers an area of approx. 600.000 sq/km.
The High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express Orbiter imaged the Region over 18 orbits.
This image is an ortho-image mosaic, where the projecting rays are perpendicular to the plane of projection.
This corrects any deformations introduced by an imaging camera and therefore such an image can be fitted directly on to a map.
From the observations, 16 HRSC orbit strips, with around 35 Gigabytes of data were used to generate a Digital Terrain Model (DTM) mosaic and an ortho-image mosaic. The DTM mosaic has a resolution of 150 mt/pixel. The resolution of individual nadir images (taken by pointing the camera vertically down to the surface) is in the range of 12 to 40 mt/pixel. Individual terrain models with a resolution of up to 50 mt were derived for every HRSC image strip.
The HR DTMs and ortho-images are derived through a complex process. Matching surface features were used to 'stitch' the images strips together, and complex geometrical calculations were used to produce the 3D coordinates of all measured points in the area".MareKromiumFeb 06, 2008
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South_Polar_Regions-h0231_0000_nd3-01.jpgFrame Mars Express n. h0231_0000_nd3 (natural colors - elab. Lunexit)53 visiteFeb 06, 2007
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NP-h1169_0000_p12-00.jpgFrame Mars Express RAW n. h1169_0000_p1266 visiteMareKromiumFeb 02, 2007
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NP-S-h0241_0009_nd3-00.jpgFrame Mars Express RAW n. h0241_0009_nd356 visiteMareKromiumFeb 02, 2007
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L-h0513_0009_nd2-00.jpgFrame Mars Express RAW n. h0513_0009_nd281 visiteMareKromiumFeb 02, 2007
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NP-h1169_0000_nd2-00.jpgFrame Mars Express RAW n. h1169_0000_nd280 visiteMareKromiumFeb 02, 2007
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B-h0032_0000_bl3-00.jpgFrame Mars Express RAW n. h0032_0000_bl354 visiteFeb 01, 2007
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B-h0032_0000_ir3-00.jpgFrame Mars Express RAW n. h0032_0000_ir357 visiteFeb 01, 2007
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A-h0751_0000_re2.jpgFrame Mars Express RAW n. h0751_0000_re254 visiteFeb 01, 2007
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A-h0751_0000_bl2.jpgFrame Mars Express RAW n. h0751_0000_bl255 visiteFeb 01, 2007
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