JunoPerijove 34: Update Ganymede 3D-control network and new DEMs study

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Planetary and Space Science Pub Date : 2024-09-25 DOI:10.1016/j.pss.2024.105981

引用次数: 0

Abstract

During the Juno Perijove 34 the JunoCam acquired four RGB images of Ganymede. These images and updated SPICE kernel for spacecraft's trajectories were used to refine previous 3D-control point network (CPN). As a result, 4954 control points were measured 22,098 times with a minimum of 2 and a maximum of 16 observations per point, based on the 302 best available images from all missions (Voyagers, Galileo and Juno). After adjustment more than 86% of points have accuracy better than 3 km (>97% - better than 5 km). A new libration value for Ganymede 18ʺ is obtained. This updated CPN was used for compiling a new Ganymede global mosaic to support the planning of observations within the JUICE mission. New detailed local DEMs were obtained by stereovectorization for Enki Catena and Tros crater regions. In the Enki chain, the ratio d/D of the depth of craters to their diameter ranges from 0.049 to 0.089 and correlates with the area types (dark or light).

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JunoPerijove 34：更新 Ganymede 3D 控制网络和新的 DEMs 研究

在 Juno Perijove 34 期间，JunoCam 获得了四幅木卫三的 RGB 图像。这些图像和更新的航天器轨迹 SPICE 内核被用来完善先前的三维控制点网络（CPN）。结果，根据所有飞行任务（旅行者号、伽利略号和朱诺号）提供的 302 幅最佳图像，对 4954 个控制点进行了 22 098 次测量，每个点的观测次数最少为 2 次，最多为 16 次。经过调整后，超过 86% 的点的精确度优于 3 千米（97% 优于 5 千米）。获得了甘尼米18ʺ的新天平校准值。更新后的 CPN 被用于编制新的 Ganymede 全球镶嵌图，以支持 JUICE 任务中的观测规划。通过对 Enki Catena 和 Tros 环形山区域进行立体矢量化，获得了新的详细局部 DEM。在恩基环形山链中，环形山深度与直径之比 d/D 在 0.049 至 0.089 之间，与区域类型（深色或浅色）相关。

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来源期刊

Planetary and Space Science 地学天文-天文与天体物理

CiteScore

5.40

自引率

4.20%

发文量

126

审稿时长

15 weeks

期刊介绍： Planetary and Space Science publishes original articles as well as short communications (letters). Ground-based and space-borne instrumentation and laboratory simulation of solar system processes are included. The following fields of planetary and solar system research are covered: • Celestial mechanics, including dynamical evolution of the solar system, gravitational captures and resonances, relativistic effects, tracking and dynamics • Cosmochemistry and origin, including all aspects of the formation and initial physical and chemical evolution of the solar system • Terrestrial planets and satellites, including the physics of the interiors, geology and morphology of the surfaces, tectonics, mineralogy and dating • Outer planets and satellites, including formation and evolution, remote sensing at all wavelengths and in situ measurements • Planetary atmospheres, including formation and evolution, circulation and meteorology, boundary layers, remote sensing and laboratory simulation • Planetary magnetospheres and ionospheres, including origin of magnetic fields, magnetospheric plasma and radiation belts, and their interaction with the sun, the solar wind and satellites • Small bodies, dust and rings, including asteroids, comets and zodiacal light and their interaction with the solar radiation and the solar wind • Exobiology, including origin of life, detection of planetary ecosystems and pre-biological phenomena in the solar system and laboratory simulations • Extrasolar systems, including the detection and/or the detectability of exoplanets and planetary systems, their formation and evolution, the physical and chemical properties of the exoplanets • History of planetary and space research