| Piú viste - Mariner, Viking & MGS's Maps & Mars in the '70s |
ZE-I-Viking1-PIA10738.jpgMars Surface near Viking Lander 1 Footpad (MULTISPECTRUM; credits: Lunexit)95 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)91 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-VikingLander_1-MF2.jpgSmall "Trench" in Chrise Planitia (Natural Colors; credits: Dr M. Faccin - Lunexit Team)91 visitenessun commentoMareKromium
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ZE-I-Viking1-Oppy-2.jpgMartian Clouds, from Viking 1 until "Oppy" (an Image-Mosaic by Dr M. Faccin)90 visitenessun commentoMareKromium
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ZE-I-Viking1-p135b.jpgColor snap-shots from Viking 1 (5)89 visitenessun commento
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O-Mariner9-02.jpgMars from Mariner 9: Olympus, alias Nix Olimpica89 visitenessun commento
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O-Mariner9-01.jpgMars from Mariner 9: Craterland...88 visitenessun commento
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ZH-Viking_Lander_2-MF2.jpgThe Rocky Landscape of Utopia Planitia (Natural - but slightly enhanced - Colors; credits: Dr M. Faccin - Lunexit Team)88 visitenessun commentoMareKromium
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ZE-I-Viking2-p141b.jpgFrom the "Viking Archive" - Viking 2: Sunrise (2)87 visitenessun commento
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ZD-VikingLander1-MF1.jpgChrise Planitia (Natural Colors - Sx - and Natural but enhanced Colors - Dx; credits: Dr M. Faccin - Lunexit Team)87 visitenessun commentoMareKromium
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ZE-I-Viking1-p133c.jpgColor snap-shots from Viking 1 (3)86 visite"...The scene has a reddish or orangeish cast. Figure (2) is constructed by incorporating data from an accompanying IR picture and using the spacecraft's test charts, in this way accounting for out of band contributions and atmospheric colorations.
The scene is shown as it might appear "on Earth". For example, if you could pick up one of the boulders and transport it to your back yard, this is the color you would observe. Note that, relative to figure (1), the reddish tint is subdued, replaced with a brown hue.
Figure (3) shows the scene as it would appear "on Mars". The yellowish cast of Sunlight filtering through the atmospheric dust imparts a similar yellowish hue to the entire scene".
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N-Mariner4-69.jpgGlobal Sand&Dust-storm from Mariner 486 visitenessun commento
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