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    ESA > Our Activities > Operations > Mars Express VMC

    Submitted images - Mars cloud

    Ian Musgrave, Australia - Circular cloud animation
    9 September 2008

    A pair of very nice animations based on the 'mysterious' Mars cloud image set published 5 Sep 2008. Thanks to Ian Musgrave, Australia, and Gordan Ugarković, Croatia.

    Ian Musgrave, Australia

    Image submitted by Ian Musgrave, Adelaide, Australia, 6 September 2008.

    Ian writes: "G'Day All: Please find attached a stereo image and an animation made from the VMC images of 29 August 2008. The 'mysterious artefact' is a cloud - but you knew that anyway."

    Ian Musgrave, Australia - Circular cloud stereo

    "The images were converted from RAW format to BMP using ImageJ, sharpened the images individually using wavelet adjustment in Registax (a wavelet correction of 10 in the 5:1 layer, and 30 in the 6:1), then finally assembled the anaglyph in The GIMP (see this link for a tutorial)."

    "For the animation, I used the sharpened images from above, and manually aligned them using the 'difference' layer function in the GIMP, then used the GIMP animation function on the aligned layers."

    Stereo image created from:
    08-242 09.48.19 VMC Img No 6.raw
    08-242 09.58.10 VMC Img No 10.raw

    Animation created from: 08-242 09.48.19 VMC Img No 1.raw
    08-242 09.48.19 VMC Img No 5.raw
    08-242 09.48.19 VMC Img No 6.raw
    08-242 09.48.19 VMC Img No 9.raw
    08-242 09.48.19 VMC Img No 10.raw
    08-242 09.48.19 VMC Img No 13.raw
    08-242 09.48.19 VMC Img No 14.raw


    Gordan Ugarković, Croatia

    Gordan Ugarković, Croatia - Circular cloud animation

    Image submitted by Gordan Ugarković, Zagreb, Croatia, 6 September 2008.

    Gordan writes: "Attached to this mail you can find an animation from [images] taken on 29 August showing a rather large, circular cloud that emerged from the terminator and dissipated within a short period afterwards. The 10 images composing the animation are the more heavily exposed frames, which were cropped and aligned on the curious feature. The colour comes from my quick'n'rudimentary debayer tool and the images were further processed in Photoshop. Also attached is a single crop enlarged 3x which I used to guesstimate the cloud height at an excess of 100 km."

    PS: "I'm perfectly fine (would be an Honor, actually!) with you using the vmc2rgb tool, but note it doesn't do the best de-Bayer work in the world, it's rather rudimentary at the moment. I may at some point implement a better algorithm, depending on how much people use it (currently it's a whopping 19 downloads at UMSF)."

    Gordan Ugarković, Croatia - Circular cloud animation

    Blow-up image created from:
    08-242 09.48.19 VMC Img No 6.raw
    08-242 09.58.10 VMC Img No 10.raw

    Animation created from:
    08-242 09.37.34 VMC Img No 1_rgb
    08-242 09.45.51 VMC Img No 5_rgb
    08-242 09.48.19 VMC Img No 6_rgb
    08-242 09.55.42 VMC Img No 9_rgb
    08-242 09.58.10 VMC Img No 10_rgb
    08-242 10.05.33 VMC Img No 13_rgb
    08-242 10.08.01 VMC Img No 14_rgb
    08-242 10.15.23 VMC Img No 17_rgb
    08-242 10.17.51 VMC Img No 18_rgb
    08-242 10.27.42 VMC Img No 22_rgb

    Access latest image(s) in the VMC public gallery here.

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