Mars Reconnaissance Orbiter (MRO)
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Craters-Wirtz_Crater-Psp_001349_1310_red~0.jpgHigh-Viscosity Flows inside Wirtz Crater (possible True Colors; credits: Lunar Explorer Italia)64 visitenessun commentoMareKromium
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Deimos-HiRISE-090309.jpgDeimos in Natural Colors and HR (credits: NASA/JPL-Caltech and Univ. of Arizona)78 visiteThese color-enhanced views of Deimos, the smaller of the two moons of Mars, result from imaging on Feb. 21, 2009, by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.
Deimos has a smooth surface due to a blanket of fragmental rock or regolith, except for the most recent impact craters. It is a dark, reddish object, very similar to Mars' other moon, Phobos. For a comparison, see HiRISE images of Phobos taken on March 23, 2008.
These Deimos images combine HiRISE exposures in Near-InfraRed, Red and Blue-Green wavelengths. In the enhanced color, subtle color variations are visible -- redder in the smoothest areas and less red near the fresh impact craters and over ridges of topographic highs (relative to Deimos' center of gravity). The color variations are probably caused by exposure of surface material to the space environment, which leads to darkening and reddening. Brighter and less-red surface materials have seen less exposure to space due to recent impacts or downslope movement of regolith.
Deimos is about 12 Km (approx. 7,5 miles) in diameter. Its orbital period is 1 day, 6 hours, 17' and 54".
These two images were acquired 5 hours and 35 minutes apart.
The Sun was to the upper left in the first (left) image, and to the right in the second image. The viewing geometry is similar in the two images, but surface features appear very different due to the change in illumination.
With an image scale of about 20 mt (66 feet) per pixel, features 60 mt (197 feet) or larger can be discerned.
These images are products from observations catalogued by the HiRISE team as ESP_012065_9000 and ESP_012068_9000. Other products from these observations are available at http://hirise.lpl.arizona.edu/deimos.php .MareKromium
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Deimos-PIA02699.jpgDeimos, from MRO55 visiteCaption NASA originale:"This image showing the position of the Martian moon Deimos against a background of stars is part of a successful technology demonstration completed by NASA's MRO before arrival at Mars. The spacecraft's Optical Navigation Camera (ONC) was used in February and March 2006 to demonstrate the use of pictures from a small camera for calculating precise location of a Mars-bound spacecraft by comparing the observed positions of Mars' two moons to their predicted positions relative to background stars. While this technique was not necessary for the Mars Reconnaissance Orbiter's own navigation, the demonstration prepares the way for relying on it for navigating precise arrivals for future missions that land on Mars.
This example image from the ONC was taken on March 6, 2006, at a distance of 1,08 MKM (about 671.000 miles) from Deimos. That moon, the smaller of Mars' two, has a diameter of about 15 Km (approx. 9 miles), and orbits 23.459 Km (approx. 14.577 miles) above Mars' surface".
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Deuteronilus_Mensae-PIA12996.jpgDeuteronilus Mensae (Natural Colors; credits for the add. process, and color.: Dr Paolo C. Fienga - Lunexit Team)80 visiteThe Terrain in this image lies in the Deuteronilus Mensae Region, along the highland-lowland Dichotomy Boundary in the Northern Hemisphere of Mars.
The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter recorded this image on March 9, 2010.
The target for this HiRISE observation was a suggestion submitted through the camera team's HiWish public-suggestion program. For more information about how to submit target suggestions, see http://uahirise.org/hiwish/.
This Region contains many Mesas surrounded by Lobate Debris Aprons that are thought to be ice-rich. These Aprons have been interpreted as a variety of possible features including rock glaciers, ice-rich mass movements, or debris-covered glacial flows. Recent radar data from the Shallow Radar instrument on the Mars Reconnaissance Orbiter has shown them to be composed of nearly pure ice. This image shows an area at the edge of one of these Mesas with a Lobate Debris Apron extending from its base.
Both the Mesa top and the Surface of the Debris Apron appear covered with ice-rich mantling materials characteristic of the Martian Mid-Latitudes and thought to have been deposited around 10 million years ago during a period of high obliquity.
This image covers a swath of ground about 1 Km (about two-thirds of a mile) wide. It is a portion of HiRISE observation ESP_016959_2240, which is centered at 43,62° North Latitude and 28,62° East Longitude. The season on Mars is Northern-Hemisphere Spring. MareKromium
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Dunes-PIA13268-PCF-LXTT.jpgDunes in Richardson Crater (EDM - Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)56 visiteThis observation from NASA's Mars Reconnaissance Orbiter (MRO) is a view of the Sand Dunefield in Richardson Crater, still partually covered with seasonal frost.
This EDM is a close-up view of defrosting patterns on the Dunes. The frost is a combination of frozen CO2 and some water ice that covers the Dunes in the Winter and Spring. As the seasonal frost sublimes away, odd features such as spots, fans, and streaks form.
Small dark streaks on the dune slip-face slopes may be where recent avalanches of sand, or perhaps wind, has moved the dark sand underlying the frost, or where frost has been removed to expose the sand. Alternatively, the dark streaks may be patches of coarse-grained ice that are clear enough so that the dark material below the ice is visible.
The slip-faces indicate the general direction of sand transport.
It has been hypothesized that the Dark Spots and Fans may be "geysers" or "cold gas jets" that form when sublimation processes trap gas at the bottom of the ice. The gas is released through cracks in the ice, entraining dust from below the ice and scattering it onto the Surface to form the Dark Spots and Fans.MareKromium
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Dunes_and_DD_Tracks-PIA13538-EB-LXTT-001.jpgSouthern Dunes and DD Tracks (Possible True Colors; credits for the additional process. and color.: Elisabetta Bonora - Lunexit Team)80 visitenessun commentoMareKromium
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Dunes_and_DD_Tracks-PIA13538-PCF-LXTT-000.jpgUnnamed Southern Crater with Large Dunefield and DD Streaks (CTX Frame - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 107 visitenessun commentoMareKromium
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Dunes_and_DD_Tracks-PIA13538-PCF-LXTT-001.jpgSouthern Dunes and DD Tracks (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteUna "singolare" Anomalìa che non può e non deve passare inosservata (di qualsiasi evento o fenomeno - naturale o artificiale - Essa costituisca l'espressione visibile).MareKromium
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Dunes_and_DD_Tracks-PIA13538-PCF-LXTT-002.jpgSouthern Dunes and DD Tracks (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)83 visitenessun commentoMareKromium
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Dunes_and_DD_Tracks-PIA13538-PCF-LXTT-003.jpgSouthern Dunes and DD Tracks: the Anomaly (an Image-Mosaic by Dr Paolo C. Fienga - Lunexit Team)135 visiteChe il "Disco Nero" sia un oggetto reale o un (nuovo e bizzarro) image-artifact, molto probabilmente noi non verremo mai a saperlo; ma che la NASA, spesso e volentieri, faccia dei pasticci i quali - agli occhi degli Appassionati e a volte, anche degli Studiosi - ci fanno rabbrividire, lo sappiamo, ormai, da molto tempo.
Ma, per il momento, lasciamo perdere ogni "dietrologia" ed andiamo a vedere la questione in dettaglio: l'immagine con il "Disco Nero" (con l'Anomalìa, insomma) è il Prodotto NASA "Full-Res JPEG" da 1,1 MB, estratto dal "NASA - Planetary Photojournal" (laddove venne pubblicato in data 25 Ottobre 2010), contrassegnato dal seriale n. PIA13538 ed estratto, dice la NASA, dal Prodotto NASA "Hi-Rise" PSP_003695_1250 (un Prodotto al quale la NASA stessa fa rimando nella pagina dedicata al frame PIA13538).
Tuttavia, se si va a guardare il Prodotto Hi-Rise PSP_003695_1250, seguendo il link fornito dalla NASA (e che porta effettivamente al Prodotto Hi-Rise PSP_003695_1250) il Disco Nero non risulta visibile. Non c'è. E' "sparito".
Perchè?
Forse perchè abbiamo sbagliato qualcosa noi e, di conseguenza, abbiamo "frainteso" l'immagine?
O perchè l'Anomalia è, palesemente, un image-artifact creatosi durante la "trasformazione" del Prodotto PSP_003695_1250 in Prodotto PIA13538?
No.
L'Anomalìa "scompare" perchè, molto semplicemente, il Prodotto PIA13538 ed il Prodotto Hi-Rise PSP_003695_1250 NON SONO lo stesso prodotto!
L'angolo di Fase - che, Vi ricordiamo, è l'Angolo disegnato dal Sole, l'Oggetto Ripreso (ivi, il Suolo di Marte e l'Anomalìa) e la Sonda che lo riprende (ivi, il Mars Reconnaissance Orbiter) - è palesemente diverso, come il nostro mosaico dimostra - riteniamo - in maniera evidente ed inequivocabile.
Conclusioni: si tratta di un Cover-up venuto malissimo? Di un (mega)-pasticcio NASA? O di un semplice errore (ancorchè piuttosto grossolano)?
Questo, ovviamente, noi non lo sappiamo e non lo possiamo sapere. Però il nostro compito, che è quello di osservare, analizzare e riportare alla Vostra attenzione i dati disponibili in chiave "informativa e divulgativa", lo abbiamo svolto: bene ed al 100%.
E queste nostre considerazioni non sono "complottismo": esse sono semplice e pura Professionalità nell'adempimento delle nostre mansioni.
Una "professionalità" che anche la NASA (ma non solo), allorchè produce Informazione e Divulgazione, dovrebbe imparare ad usare: perchè i "grandi (se non "immensi") mezzi", da soli, non bastano!
Meditateci sopra e poi, se volete, scrivete qualche commento...MareKromium
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Dust_Storm-MGS-41668_PIA22519_original_marci-dgm-v04-for-home-page-5.gifThe Global Dust Storm that wiped Oppy away114 visiteCaption NASA:"This set of images from NASA’s Mars Reconnaissance Orbiter (MRO) shows a fierce, giant Dust Storm is kicking up on Mars, with Rovers on the Surface indicated as icons. The spread of the Storm can be seen in the salmon-colored overlay. These images from MRO's Mars Color Imager start from May 31, when the Dust Event was first detected, and go through June 11, 2018.
MRO creates Global Maps of Mars but roll maneuvers for targeted observations produce gaps in the coverage, which appear as black gores in the aforementioned Maps. On some days there are data drops where partial or full orbits of coverage are missing. Green and purple observed in the South Polar Region indicate saturated pixels. Latitude is indicated along the Vertical Axis. Longitude is indicated along the Horizontal Axis".MareKromium
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Dust_Storm-MGS-41669_Zurek-1-PIA22519.gifThe Global Dust Storm that wiped Oppy away (Annotated)114 visiteCaption NASA:"This set of images from NASA’s Mars Reconnaissance Orbiter (MRO) shows a fierce, giant Dust Storm is kicking up on Mars, with Rovers on the Surface indicated as icons. The spread of the Storm can be seen in the salmon-colored overlay. These images from MRO's Mars Color Imager start from May 31, when the Dust Event was first detected, and go through June 11, 2018.
MRO creates Global Maps of Mars but roll maneuvers for targeted observations produce gaps in the coverage, which appear as black gores in the aforementioned Maps. On some days there are data drops where partial or full orbits of coverage are missing. Green and purple observed in the South Polar Region indicate saturated pixels. Latitude is indicated along the Vertical Axis. Longitude is indicated along the Horizontal Axis".MareKromium
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