위성-지상간 광통신용 지상단말기의 위성 지향을 위한 PAA 도출 및 제어 알고리즘 = Point Ahead Angle(PAA) Estimation and a Control Algorithm for Satellite-Pointing of the Ground Terminal in Satellite-to-Ground Optical Communication

다국어 초록 (Multilingual Abstract)

Free-space optical communication technology enables the high-speed data transmission and excellent anti-jammingsecurity. We conduct research on satellite-to-ground free-space optical communication links for high-speedtransmission of large-capacity surveillance and reconnaissance data. Since the satellite continues to move along itsorbit while the optical signal is transmitted between the satellite and the ground, the pointing angle of the beamfrom the ground terminal needs to be corrected by Point Ahead Angle(PAA) so that the transmitted light reachesthe expected location of the satellite. In this paper, we present the algorithm for PAA estimation and control.

참고문헌 (Reference)

1 K. Park, "Ultra-low orbit satellites for surveillance and reconnaissance" 9 : 20-23, 2023

2 B. D. Tapley, "Statistical Orbit Determination" Academic Press 2004

3 B. R. Townsend, "Space Based Satellite Tracking and Characterization Utilizing Non-Imaging Passive Sensors" Air Force Institute of Technology 2008

4 D. Hobbs, "Precise Orbit Determination for Low Earth Orbit Satellites" 4 : 1-7, 2006

5 R. Fletcher, "Practical methods of optimization" John Wiley & Sons, Inc 1987

6 임형철 ; 임홍서 ; 문홍규 ; 박필호 ; 이우경 ; 윤재혁, "Orbit Determination Of GPS and KOREASAT 2 Satellite Using Angle-Only Data and Requirements for Optical Tracking System" 21 : 221-232, 2004

7 N. Qian, "On the momentum term in gradient descent learning algorithms" 12 (12): 145-151, 1999

8 A. Bjorck, "Numerical Methods for Least Squares Problems" SIAM 1996

9 "NORAD/elements/"

10 P. L. Thompson, "NASA’s LCOT(low-cost optical terminal)FSOS(free-space optical subsystem) : concept, design, build, and test" 12413 : 2023

11 G. H. Spencer, "General Ray-Tracing Procedure" 52 : 672-678, 1962

12 R. R. Bate, "Fundamentals of Astrodynamics: Second Edition" Dover Publication 2020

13 D. A. Vallado, "Fundamentals of Astrodynamics and Applications-Fifth Edition" Oregon 2022

14 J. C. Juarez, "Free-Space Optical Communications for Next-generation Military Networks" 44 (44): 46-51, 2006

15 S. Kumar, "Emerging Military Applications of Free Space Optical Communication Technology: A Detailed Review" 2161 (2161): 012011-, 2022

16 D. Ly, "Correcting TLEs at epoch : Application to the GPS constellation" 7 (7): 302-306, 2020

17 M. D. Zeiler, "ADADELTA : An Adaptive Learning Rate Method"

18 K. Anbarasi, "A review on channel models in free space optical communication systems" 97 : 161-171, 2017