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Analysis staff releases a 76 m-per-pixel international colour picture dataset and map of Mars

August 16, 2024
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Analysis staff releases a 76 m-per-pixel international colour picture dataset and map of Mars
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A 76m per pixel global color image dataset and map of Mars by Tianwen-1 has been released
A real colour Mars international picture map in Robinson projection is created with Tianwen-1 MoRIC picture information, the decision of the unique information is ~76 m per pixel, and the horizontal accuracy is 68 m. Credit score: Science China Press

Distant-sensing photos of Mars include wealthy details about its floor morphology, topography, and geological construction. These information are basic for scientific analysis and exploration missions of Mars. Previous to China’s first Mars exploration mission, information from six superior optical imaging techniques of various missions within the Martian orbit was used to generate Mars international/near-global picture datasets with spatial resolutions higher than 1 km.

Nonetheless, when it comes to international colour photos, the most effective model of Mars Viking Colorized International Mosaic has a decision of roughly 232 m/pixel. There’s a lack of worldwide colour photos of Mars on the hundred-meter scale and better decision.

New information obtained by the Tianwen-1 mission has laid the inspiration for the event of a high-resolution international color-image map of Mars with excessive positioning accuracy. As of July 25, 2022, Tianwen-1 Average Decision Imaging Digital camera (MoRIC) had accomplished imaging over 284 orbits throughout its remote-sensing mission interval, buying 14,757 photos with spatial resolutions between 57 and 197 m.

The collected photos achieved international protection of the Martian floor. At nearly the identical time, a complete of 325 strips of information within the seen and near-infrared bands had been obtained by the Tianwen-1 Mars Mineralogical Spectrometer, with spatial resolutions various from 265–800 m.

Utilizing the above-mentioned information, Professor Li Chunlai at Nationwide Astronomical Observatory of the Chinese language Academy of Sciences and Professor Zhang Rongqiao at Lunar Exploration and Area Engineering Middle led the Tianwen-1 science staff and collaborators to conduct analysis on picture information processing and international mapping of Mars. The analysis is published within the journal Science Bulletin.

  • A 76m per pixel global color image dataset and map of Mars by Tianwen-1 has been released
    The optical digital camera (MoRIC) and imaging spectrometer (MMS) onboard the Tianwen-1 orbiter had been used to acquire remote-sensing photos of the whole Martian floor. Credit score: Science China Press
  • A 76m per pixel global color image dataset and map of Mars by Tianwen-1 has been released
    (a) Degree 2C information product because the enter, (b) picture corrected by atmospheric correction, (c) picture corrected by photometric correction, and (d) picture corrected after colour correction. Credit score: Science China Press

This research used the bundle adjustment know-how to optimize the unique orbit measurement information by treating Mars as a unified adjustment community, decreasing the place deviation between particular person MoRIC photos to underneath 1 pixel, and attaining pixel-level “seamless” international picture mosaicking.

Brightness and colour consistency of the worldwide photos was ensured via colour correction and international colour uniformity. The true colours of the Martian floor had been measured utilizing the MMS onboard the Tianwen-1 orbiter, and a true-color reference for the Martian floor was established for true colour restoration.

By means of this research, a world colour picture dataset and map of Mars (Tianwen-1 Mars International Colour Orthomosaic 76 m v1), with a decision of 76 m and a horizontal accuracy of 68 m was produced and launched.

The Tianwen-1 Mars International Colour Orthomosaic information merchandise fill the hole within the high-precision positioning of Mars international color-image information merchandise at a scale of tens of meters. It’s at the moment the very best decision international true-color picture map of Mars, and considerably improves the decision and colour authenticity of generally used international Mars photos.

This mapping product can function a brand new Mars international base map, offering a higher-quality geographic reference for worldwide friends to conduct Mars picture mapping at scales of tens of meters, meters, and submeters, in addition to supporting subsequent Mars exploration missions and scientific analysis.

Extra data:
Jianjun Liu et al, A 76-m per pixel international colour picture dataset and map of Mars by Tianwen-1, Science Bulletin (2024). DOI: 10.1016/j.scib.2024.04.045

Offered by
Science China Press


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Analysis staff releases a 76 m-per-pixel international colour picture dataset and map of Mars (2024, August 15)
retrieved 15 August 2024
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