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Benvenuti in queste pagine dedicate a scienza, storia ed arte. Amelia Carolina Sparavigna, Torino

Showing posts with label dunes. Show all posts
Showing posts with label dunes. Show all posts

Thursday, August 22, 2013

Moving sand dunes on Mars

Moving Sand Dunes on Mars, by Amelia Carolina Sparavigna, Department of Applied Science and Technology, Politecnico di Torino, Torino, Italy

Abstract: It was recently announced that the sand dunes on Mars can move. This important result was obtained by means of the High Resolution Imaging Science Experiment (HiRISE), the camera onboard the Mars Reconnaissance Orbiter. The images, recorded three years apart, of the dunes in the Nili Patera caldera show that they move. Here we compare an image HiRISE of 2007 with an image of 1999 recorded by the Mars Global Surveyor. Therefore, with the help of Gimp, the GNU image processing software to enhance the images, we can see and measure the motion of the dunes during a longer period of time.

A dune on Mars which is moving. In the Nili Patera caldera.
199 on the left, 2007 on the right


More details and article at:


Sunday, August 11, 2013

Moving sand dunes on the Google Earth

"Moving dunes on the Google Earth" is my paper on arXiv, published 4 January 2013. It shows how using GH time series you can see the motion of dunes. Here an example.


To see a movie, please visit Moving sand dunes ... post