Mutual event observations of solar system objects by SRC on Mars Express
Mutual event observations of solar system objects by SRC on Mars Express
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DOI：
10.1051/0004-6361/201731644
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发表时间：
2018-06
影响因子：
6.5
通讯作者：
R. Ziese;K. Willner
中科院分区：
文献类型：
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作者：
R. Ziese;K. Willner
上下文火卫一和火卫二这两颗火星卫星在火星快车探测器上的超分辨率通道（SRC）的几次成像活动中都被观测到。在相互事件观测期间获得了数十张图像-当火星卫星都被观测或与另一个太阳系天体一起观测时。这些观测为确定天体在其轨道上的位置提供了新的机会。目标。寻求一种方法来自动观察成像物体的位置。在一个图像序列内，所有图像中的对象的类似精确定位应该是可能的。方法.应用Phobos和Deimos的形状模型来模拟图像中身体的外观。将照明模拟与观察相匹配提供了对图像内的身体位置的可靠确定。为了提高匹配置信度，需要将几个校正应用于模拟以紧密地重建观测。结果斯特拉斯堡Données天文学中心（CDS）提供了不同物体之间884个相对位置的清单。
Context. Both Martian moons, Phobos and Deimos, have been observed during several imaging campaigns by the Super Resolution Channel (SRC) on the Mars Express probe. Several tens of images are obtained during mutual event observations – when the Martian moons are both observed or together with another solar system body. These observations provide new opportunities to determine the bodies’ positions in their orbits. Aims. A method was sought to automate the observation of the positions of the imaged bodies. Within one image sequence a similarly accurate localization of the objects in all images should be possible. Methods. Shape models of Phobos and Deimos are applied to simulate the appearance of the bodies in the images. Matching the illuminated simulation against the observation provides a reliable determination of the bodies’ location within the image. To enhance the matching confidence several corrections need to be applied to the simulation to closely reconstruct the observation. Results. A list of 884 relative positions between the different objects is provided through the Centre de Données astronomiques de Strasbourg (CDS).