The Determination of the Rotational State and Interior Structure of Venus with VERITAS
The Determination of the Rotational State and Interior Structure of Venus with VERITAS
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DOI：
10.3847/psj/ac26c0
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发表时间：
2021-12-01
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影响因子：
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通讯作者：
Smrekar, S. E.
中科院分区：
文献类型：
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作者：
Cascioli, G.;Hensley, S.;Smrekar, S. E.
了解导致金星达到当前状态并推动其未来演化的过程是下一代轨道飞行器的主要目标。在这项工作中，我们通过 NASA 发现级任务 VERITAS 分析了金星的自旋矢量、潮汐响应和转动惯量的检索。通过模拟对机载合成孔径雷达提供的多普勒跟踪数据和连接点的系统联合分析，我们表明VERITAS将潮汐Love数k (2) 的估计精度（3 sigma）提高到4.6 x 10(-4)，潮汐相位滞后达到0.deg 05，惯性矩因子达到9.8 x 10(-4)（预期值的0.3%）值）。将这些结果应用到最近的金星内部模型中，我们表明 VERITAS 将为金星内部结构提供大大改进的约束。
Understanding the processes that led Venus to its current state and will drive its future evolution is a major objective of the next generation of orbiters. In this work we analyze the retrieval of the spin vector, the tidal response, and the moment of inertia of Venus with VERITAS, a NASA Discovery-class mission. By simulating a systematic joint analysis of Doppler tracking data and tie points provided by the onboard synthetic aperture radar, we show that VERITAS will provide accuracies (3 sigma) in the estimates of the tidal Love number k (2) to 4.6 x 10(-4), its tidal phase lag to 0.degrees 05, and the moment of inertia factor to 9.8 x 10(-4) (0.3% of the expected value). Applying these results to recent models of the Venus interior, we show that VERITAS will provide much-improved constraints on the interior structure of the planet.