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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국우주과학회 Journal of Astronomy and Space Sciences Journal of Astronomy and Space Sciences 제38권 제3호
- 발행연도
- 2021.9
- 수록면
- 165 - 173 (9page)
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초록· 키워드
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Apophis is a near-Earth object with a diameter of approximately 340 m, which will come closer to the Earth than a geostationary orbit in 2029, offering a unique opportunity for characterizing the object during the upcoming encounter. Therefore, Korea Astronomy and Space Science Institute has a plan to propose a space mission to explore the Apophis asteroid using scientific instruments such as a laser altimeter. In this study, we evaluate the performance metrics of a laser altimeter using a pseudorandom noise modulation technique for the Apophis mission, in terms of detection probability and ranging accuracy. The closed-form expression of detection probability is provided using the cross correlation between the received pulse trains and pseudo-random binary sequence. And the new ranging accuracy model using Gaussian error propagation is also derived by considering the sampling rate. The operation range is significantly limited by thermal noise rather than background noise, owing to not only the low power laser but also the avalanche photodiode in the analog mode operation. However, it is demonstrated from the numerical simulation that the laser altimeter can achieve the ranging performance required for a proximity operation mode, which employs commercially available components onboard CubeSat-scale satellites for optical communications.
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참고문헌 (21)
참고문헌 신청
J. Abshire / 1984 / Performance of OOK and Low-Order PPM Modulations in Optical Communications When Using APD-Based Receivers / IEEE Transactions on Communications 32(10):1140~1143
Xiao Ai / 2011 / High-resolution random-modulation cw lidar / Applied Optics 50(22):4478
Richard P. Binzel / 2009 / Spectral properties and composition of potentially hazardous Asteroid (99942) Apophis / Icarus 200(2):480~485
Marina Brozović / 2018 / Goldstone and Arecibo radar observations of (99942) Apophis in 2012–2013 / Icarus 300:115~128
B. Buttgen / 2007 / Pseudonoise Optical Modulation for Real-Time 3-D Imaging With Minimum Interference / IEEE Transactions on Circuits and Systems I: Regular Papers 54(10):2109~2119
Xiao Ai / 2011 / High-resolution random-modulation cw lidar / Applied Optics 50(22):4478
Richard P. Binzel / 2009 / Spectral properties and composition of potentially hazardous Asteroid (99942) Apophis / Icarus 200(2):480~485
Marina Brozović / 2018 / Goldstone and Arecibo radar observations of (99942) Apophis in 2012–2013 / Icarus 300:115~128
B. Buttgen / 2007 / Pseudonoise Optical Modulation for Real-Time 3-D Imaging With Minimum Interference / IEEE Transactions on Circuits and Systems I: Regular Papers 54(10):2109~2119
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