JUICE任务Ganymede激光高度计(GALA)性能模型仿真

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2016-03-10 DOI:10.2322/TASTJ.17.150

H. Araki, K. Ishibashi, N. Namiki, H. Noda, Masanori Kobayashi, K. Enya, M. Ozaki, T. Mizuno, Yoshifumi Saito, K. Touhara, S. Oshigami, S. Kashima, J. Kimura, S. Kobayashi, G. Steinbruegge, A. Stark, C. Althaus, S. Togno, K. Lingenauber, H. Hussmann

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引用次数: 3

摘要

为了明确GALA各模块之间的接口条件要求，我们在Bepi-Colombo激光高度计(BELA)模型的基础上建立了GALA的性能模型。性能模型量化了链路预算、距离精度、反照率测量精度和误检概率(PFD)。在性能模型中，考虑了来自Ganymede表面散射太阳光的背景噪声、APD的表面和大体积暗电流、APD- tia的本底噪声、散粒噪声和散斑噪声。还考虑了木卫三表面的黑体发射，但与其他噪声相比，它对信噪比的影响可以忽略不计。在验证模型评估后，应包括EMI噪声。

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Performance Model Simulation of Ganymede Laser Altimeter (GALA) for the JUICE Mission

In order to clarify the requirement on the interface conditions between modules of GALA, we developed the performance model of GALA based on the model of BELA (Bepi-Colombo Laser Altimeter). The performance model quantifies the link budget, range accuracy, albedo measurement accuracy, and probability of false detection (PFD). In the performance model, background noise from scattered sunlight from the Ganymede surface, surface and bulk dark currents of APD, noise floor of APD-TIA, shot noise, and speckle noise are taken into consideration. Black-body emission from the Ganymede surface is also taken into account while its influence to SNR is negligible compared with other noises. EMI noise shall be included after the evaluation of the verification model.

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TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN

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