| Risultati della ricerca nelle immagini - "Aureum" |
Chaotic_Terrain-Aureum_Chaos-PIA07931-PCF-LXTT-01.jpgFeatures of Aureum Chaos (Extremely Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)184 visiteNote: the THEMIS VIS camera is capable of capturing color images of the Martian Surface using 5 different color filters. 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. To make a color image, 3 of the 5 filter images (each in grayscale) are selected. Each is contrast enhanced and then converted to a red, green, or blue intensity image.
These 3 images are then combined to produce a full color, single image BUT, since the THEMIS color filters DO NOT span the full range of colors seen by the human eye, a color THEMIS image DOES NOT represent true color. Also, because each single-filter image is contrast enhanced before inclusion in the 3-color image, the apparent color variation of the scene is exaggerated. Nevertheless, the color variation that does appear is representative of some change in color, however subtle, in the actual scene. The long edges of THEMIS color images typically contain color artifacts that do not represent or imply actual Surface Variations.
Image information: VIS instrument;
Latitude 3,6° South;
Longitude 332,9° East (such as 27,1° West);
Resolution: 35 meter/pixel.MareKromium
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Chaotic_Terrain-Aureum_Chaos-PIA07932-PCF-LXTT.jpgFeatures of Aureum Chaos (Extremely Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)184 visiteNote: the THEMIS VIS camera is capable of capturing color images of the Martian Surface using 5 different color filters. 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. To make a color image, 3 of the 5 filter images (each in grayscale) are selected. Each is contrast enhanced and then converted to a red, green, or blue intensity image.
These 3 images are then combined to produce a full color, single image BUT, since the THEMIS color filters DO NOT span the full range of colors seen by the human eye, a color THEMIS image DOES NOT represent true color. Also, because each single-filter image is contrast enhanced before inclusion in the 3-color image, the apparent color variation of the scene is exaggerated. Nevertheless, the color variation that does appear is representative of some change in color, however subtle, in the actual scene. The long edges of THEMIS color images typically contain color artifacts that do not represent or imply actual Surface Variations.
Image information: VIS instrument;
Latitude 3,6° South;
Longitude 332,9° East (such as 27,1° West);
Resolution: 35 meter/pixel.MareKromium
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Chaotic_Terrain-Aureum_Chaos-PIA14987-PCF-LXTT.jpgFeatures of Aureum Chaos (Enhanced Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 174 visiteOrbit Number: 43169
Latitude: 4,036° South
Longitude: 333,407° East
Instrument: VIS
Captured: September, 7th, 2011
Mars Local Time (M.L.T.): 18:50 (Late Afternoon)
MareKromium
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ESP_017581_1765_RED_abrowse.jpgExposed Light Material in Upland Region in Aureum Chaos (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)127 visiteThe Plateau visible in this image is located within Aureum Chaos. Chaotic Terrains on Mars are blocky, fractured regions of flat-topped hills, plateaus, plains and depressions thought to have formed by the collapse of the heavily cratered uplands.
Large Outflow Channels appear to emerge from Aureum Chaos and other Chaotic Terrains leading researchers to posit that these large collapse regions were formed by the catastrophic release of ground water. Aureum Chaos is located just to the North-East of Valles Marineris adjacent to Margaritifer Terra, and it has a diameter of approximately 368 kilometers.
The steep-sided Plateau in this image has a sharp, undulating surface possibly etched out and eroded by persistent winds. These same winds may well have transported the resulting sediment to the surrounding plains helping to form the Dunes below. The Plateau slopes are steep and consist of a series of parallel bright, more resistant cliff forming layers and darker, less resistant slope material. A good way to see the differences in color between the plateau's bright layered deposits and the surrounding area is to look at some of the blocks that have fallen off the cliff onto the the dark sands below.
By studying areas of Mars such as this one, researchers hope to understand how the chaos regions formed and how their formation related to the release of ground water to form the outflow channels, if indeed the two are connected in this way.
Written by: Shawn Hart and Ginny GulickMareKromium
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ESP_021906_1765_RED_abrowse-PCF-LXTT.jpgFeatures of Aureum Chaos (Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)191 visitenessun commentoMareKromium
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ESP_024029_1765-PCF-LXTT-00.jpgFeatures of Aureum Chaos (CTX "A" - Enhanced Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 225 visiteMars Local Time: 14:15 (Early Afternoon)
Coord. (centered): 3,6° South Lat. and 332,6° East Long.
Spacecraft altitude: 270,4 Km (such as about 169,0 miles)
Original image scale range: 27,1 cm/pixel (with 1 x 1 binning) so objects ~ 81 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 5,6°
Sun-Mars-Spacecraft (or "Phase") Angle: 39,4°
Solar Incidence Angle: 34° (meaning that the Sun is about 56° above the Local Horizon)
Solar Longitude: 359,1° (Northern Winter)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Dr Paolo C. Fienga - Lunar Explorer ItaliaMareKromium
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ESP_024029_1765-PCF-LXTT-01.jpgFeatures of Aureum Chaos (CTX "B" - Enhanced Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 216 visiteMars Local Time: 14:15 (Early Afternoon)
Coord. (centered): 3,6° South Lat. and 332,6° East Long.
Spacecraft altitude: 270,4 Km (such as about 169,0 miles)
Original image scale range: 27,1 cm/pixel (with 1 x 1 binning) so objects ~ 81 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 5,6°
Sun-Mars-Spacecraft (or "Phase") Angle: 39,4°
Solar Incidence Angle: 34° (meaning that the Sun is about 56° above the Local Horizon)
Solar Longitude: 359,1° (Northern Winter)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Dr Paolo C. Fienga - Lunar Explorer ItaliaMareKromium
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PSP_002892_1760_RED_abrowse-00.jpgLayered Deposits in Aureum Chaos (CTX Frame - Absolute Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)55 visiteThis observation shows an Outcrop of a large slab of Layered Deposits in Aureum Chaos.
Chaotic Terrains on Mars are disorganized regions of Blocks and Large Mounds which appear to have been produced by the collapse of pre-existing terrain. They are often associated with giant Outflow Channels, and they may have been the source of the water that carved the Channels.
This link is an important part of understanding the history of water on Mars. One way to address this is to study the rocks left behind in the Chaotic Terrains.
The Outcrop shown in the following EDM is several kilometers across and light-toned. It has a slab-like appearance, with relatively steep edges and a flat top, although the top has many small Knobs and Spires. In places, particularly along the West edge of the main slab, it is clear that the light material is composed of many fine layers, which are eroding in a stepped fashion due to the variable resistance of the layers. The flat surface of the Outcrop is partially coated with Dark Dust, obscuring its light tone.
Along the edges, the Outcrop is breaking into boulders and eroding away, but it is strong enough that it preserves steep Slopes, particularly on the Eastern Edge.
Away from the large slab, the image consists of Hills and Mounds characteristic of Chaotic Terrain. Little detail is visible on the Mounds. The low areas have been partially covered by wind-blown Sand or Dust, forming the pervasive Ripples seen in the image. Light material can be seen under the Ripples in a few places, indicating that the light layered deposits extend farther than just the slab.MareKromium
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PSP_002892_1760_RED_abrowse-01.jpgLayered Deposits in Aureum Chaos (EDM - Absolute Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)54 visitenessun commentoMareKromium
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PSP_004026_1765-2-GB-PCF-LXTT.jpgVery strange "Dark Spot" in Aureum Chaos (Original JP2 b/w; credits for the addituional process.: Dr Gianluigi Barca - Lunexit Team)114 visitenessun commentoMareKromium
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PSP_004026_1765-3-GB-PCF-LXTT.jpgVery strange "Dark Spot" in Aureum Chaos (EDM - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)148 visiteAll'interno di questo canalone - uno dei tanti che si trovano nella Regione peri-Equatoriale conosciuta come Aureum Chaos (situata ad approx. 4° di Lat. Sud ed approx. 334° di Long. Est) -, assieme alle solite "ripples" (dunette), ho scorto una chiazza scura (che è emersa di un denso color nero, a seguito del processing Multispettrale da me abitualmente usato) la quale mi ha lasciato perplesso.
In attesa di esaminare il dettaglio in formato JP2, posso comunque dire che POTREBBE trattarsi di un'area infossata la quale si è, nel tempo, riempita di polveri sottilissime (tipo il nostro "particolato").
Polveri che, come sapete bene, se osservate a risoluzione modesta, appaiono come una (appunto) "chiazza scura" che ha, vagamente, le sembianze di un laghetto (o meglio: di una sorta di palude...).
Ritengo di poter ESCLUDERE l'eventualità per cui si tratti di una semplice ombra e mi piace considerare l'ipotesi (vista la curiosa - ma, a mio parere, davvero FORTISSIMA - somiglianza fra questa "chiazza nera" e le "chiazze nere" presenti sulla butterata Superficie della Luna Saturniana Iperione - Hyperion) per cui si possa trattare di un autentico affioramento di idrocarburi (surfacing hydrocarbons). Un "laghetto di petrolio" (o di sabbie intrise di petrolio), insomma...
Un'eventualità, quest'ultima, da me già ipotizzata (non solo per Iperione e Titano, ma anche per il Pianeta Rosso) da qualche anno e, al momento, non confermata nè smentita dalla NASA (sempre e solo per quanto attinente Marte).
Le Vostre opinioni saranno, come sempre, apprezzate.
Dr Paolo C. Fienga - Lunar Explorer ItaliaMareKromium
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PSP_004026_1765-5-GB-PCF-LXTT.jpgVery strange "Dark Spot" in Aureum Chaos (RAW Natural Colors; credits for the addituional process. and color.: Drr Gianluigi Barca and Paolo C. Fienga - Lunexit Team)101 visitenessun commentoMareKromium
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