| Piú viste - Mariner, Viking & MGS's Maps & Mars in the '70s |
ZE-I-Viking1-p133b.jpgColor snap-shots from Viking 1 (2)80 visite"...Even for pictures where we have both visible and IR information, two possible types of color can be created. The character of the Sunlight reaching the Martian Surface is significantly different than that reaching Earth's surface, primarily because of scattering and absorption by suspended dust particles. In addition, a certain amount of light reflected from the yellowish brown surface finds its way back as reflected sky light.
Figures (1), (2), and (3) illustrate the range of possible color reconstructions. All three pictures are based on the same camera data. The sampling area at the Viking 1 Site is shown. Two trenches in the Sandy Flats site, the first to be dug are shown at the far left.
Figure (1) is produced by using only visible color information, making no allowance for IR leaks..." (continua)
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QC-VikingOne-The_B-Rock-PIA00386-EB00.jpgThe "B-Rock" (RAW Original CTX Frame + Newspaper version; credits: Elisabetta Bonora)80 visiteGrazie alla pazienza della nostra Amica Elisabetta Bonora, forse adesso riusciremo a chiarire un vecchio "Mistero Marziano": si tratta della "B-Rock", fotografata dal Viking Lander One, nella Pianura di Chrise.
L'inset, come potete vedere Voi stessi, sembra dimostrare - quasi inequivocabilmente - la presenza, sulla roccia in questione, di almeno tre caratteri convenzionali: la lettera "B" (la più chiara), la lettera "C" (meno chiara) ed il numero "2" (ancora meno evidente).
La notizia (eravamo nel 1976) fece rapidamente il giro del Mondo - così come accadde per la "Faccia di Marte", ossìa la "Sfinge di Cydonia Mensae" - e solleticò l'Immaginario Collettivo in maniera più che consistente ma...Il "Mistero" era veramente tale?
Ebbene, a parere di molti - e dato che ancora oggi se ne parla - evidentemente si.
Ma, a nostro parere, l'ondata di eccitazione che travolse - letteralmente - le capacità cognitive di milioni di Appassionati fu decisamente eccessiva, viste la reale natura e le effettive dimensioni del fenomeno.
Mai nessuno (infatti e che si sappia) provò a contestualizzare la possibile Anomalìa (chiedendosi, ad esempio, che cosa ci facessero due lettere ed un numero arabo su una roccia Marziana e che senso potesse mai avere un messaggio che recitava "2 B C"), ma si passò direttamente alla fase successiva: la celebrazione della "scoperta".
Fu Vera Gloria? Secondo noi, no.
La "scoperta", infatti, era solo una bufala che, a nostro parere, acquisì una dimensione planetaria grazie alla "sapiente mano" di qualcuno che ALTERO' (diremmo in maniera piuttosto grezza e palese - d'altronde eravamo nel '76, anche se i "furbetti" già iniziavano a manifestarsi in questo Campo...) il frame originale EVIDENZIANDO solo alcuni dettagli presenti sulla roccia - un giochetto del tipo "Unisci i Punti" e "Colora", come se ne trovano sulla "Settimana Enigmistica" - e grazie, soprattutto, agli occhi ed all'immaginazione di un Pubblico particolarmente vivace e recettivo, ma decisamente poco propenso alla disamina critica del materiale propostogli (teorie esplicative del medesimo incluse).
Tuttavia, per smascherare il trucco, bastava andare a guardare il frame originale (cosa che faremo adesso)...MareKromium
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QB-VikingOne-PIA08616-01.jpgViking One: the Landing Site, 30 years after the landing... (2)79 visiteCaption NASA originale:"The suite of pictures shown here describes the best MOC view of the Landing Site. These were previously released in May 2005, but the MOC team felt that 20 July 2006 is an appropriate time to review this story.
The 1st figure (1) visually tells how the Lander was found. The initial observations of the location of Viking 1, as originally determined by members of the Viking science team based on sightlines to various crater rims seen in the Lander images (black lines), did not show the detailed features we knew from the Lander pictures (2) to be in the area.
Using geodetic measurements, the late Merton Davies of the RAND Corporation, a MGS-MOC Co-Investigator, suggested that we should image areas to the East and North of where Viking 1 was thought to be. Timothy J. Parker of the JPL (Pasadena, California), using sightlines to crater rims seen in the Lander images (white lines), deduced a location very close to that suggested by Davies".
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ZE-I-Viking1-p138b.jpgColor snap-shots from Viking 1 (9)76 visitenessun commento
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ZE-I-Viking1-p140a.jpgColor snap-shots from Viking 1 (11)75 visitenessun commento
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ZI-Viking1-21g132-2-MF-LXTT.jpgAnother "Brick" in the Wall... (CTX Frame 2 - credits for the additional process.: Dr Marco Faccin - Lunexit Team)75 visitenessun commentoMareKromium
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ZE-I-Viking1-p135a.jpgColor snap-shots from Viking 1 (4)74 visitenessun commento
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ZF-I-Viking2-22a158corr-MF.jpgFrom the "Viking Archive" - Viking 2: antenna, sky and horizon (True Colors; credits: Dr M. Faccin)74 visitenessun commentoMareKromium
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ZE-I-Viking_Lander_1-MF5.jpgSunny Day over Chrise Planitia (Natural Colors; credits: Dr M. Faccin - Lunexit Team)74 visitenessun commentoMareKromium
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ZE-I-Viking1-PIA10738.jpgMars Surface near Viking Lander 1 Footpad (MULTISPECTRUM; credits: Lunexit)73 visiteCaption NASA:"This image, which has been flipped horizontally, was taken by Viking Lander 1 on August 1st, 1976, 12 Soles after the landing. Much like images that have returned from Phoenix, the soil beneath Viking 1 has been exposed due to exhaust from thruster engines during descent.
This is visible to the right of the struts of Viking's surface-sampler arm housing, seen on the left".MareKromium
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ZE-I-Viking1-p133a.jpgColor snap-shots from Viking 1 (1)70 visite"...As it has been already discussed in the past, the problems in reconstructing the (true) colors of the Martian Surface and Atmosphere are formidable.
It would be nice to present a folio of color pictures with the unqualified comment that these are the (Real) "Colors of Mars". But, after more than a year (many more, now) of analysis, it becomes clear that the situation will never become so simple.
In order to correct for the out of band spectral leaks in the color filters within the camera it is necessary to have access to both a color and an infrared (JR) picture taken at the same time. Only in that way can the IR contributions to the visible color, a result of camera filter design, be assessed.
For the many color pictures taken without an IR companion detailed calibration is not possible. Instead, the three visible channels-blue, green, and red-are balanced on the assumption that there are no out of band contributions..." (continua)
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ZE-I-Viking1-p137b.jpgColor snap-shots from Viking 1 (7)69 visite"...In the course of the Martian Year an important surface change was observed at the Viking 1 site. During the Winter months a thin layer of frost formed. This is documented by comparing two black and white pictures, the first taken early in the mission in late Martian Summer and the second taken months later in late Martian Winter.
Patches of receding frost were visible in the 2nd picture. During the height of Winter, frost probably covered the entire surface.
This picture is a color image of the frost, looking across the spacecraft. The colors purposely have been distorted slightly to enhance color contrast.
The frost persists at temperatures higher than those required for frozen Carbon Dioxide (dry ice).
It may be Water Ice or a Carbon Dioxide clathrate, a crystalline mixture of H2O and CO2".
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