Abstract

The allowable path-deviation time of aircraft in a free-space optical communication system has been estimated from various trajectories, using different values of aircraft speeds and turn rates. We assumed the existence of a link between the aircraft and a ground base station. First, the transmitter beam’s divergence angle was calculated through two different approaches, one based on a simple optical-link equation, and the other based on an attenuation coefficient. From the calculations, the discrepancy between the two approaches was negligible when the link distance was approximately 110 km, and was under 5% when the link distance ranged from 80 to 140 km. Subsequently, the allowable path-deviation time of the aircraft within the tracking-error tolerance of the system was estimated, using different aircraft speeds, turn rates, and link distances. The results indicated that the allowable path-deviation time was primarily determined by the aircraft’s speed and turn rate. For example, the allowable path-deviation time was estimated to be ~3.5 s for an aircraft speed of 166.68 km/h, a turn rate of 90°/min, and a link distance of 100 km. Furthermore, for a constant aircraft speed and turn rate, the path-deviation time was observed to be almost unchanged when the link distance ranged from 80 to 140 km.

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Other (11)

Fawaz W., Abou-Rjeily C., and Assi C.UAV-aided cooperation for FSO communication systemsIEEE Commun. Mag.2018567075

C. Chen, A. Grier, M. Malfa, E. Booen, H. Harding, C. Xia, M. Hunwardsen, J. Demers, K. Kudinov, G. Mak, B. Smith, A. Sahasrabudhe, F. Patawaran, T. Wang, A. Wang, C. Zhao, D. Leang, J. Gin, M. Lewis, D. Nguyen, and K. QuirkHigh-speed optical links for UAV applicationsProc. SPIE2017100961009615-11009615-9

B. Moision, B. Erkmen, E. Keyes, T. Belt, O. Bowen, D. Brinkley, P. Csonka, M. Eglington, A. Kazmierski, N. Kim, J. Moody, T. Tu, and W. VermeerDemonstration of free-space optical communication for long-range data links between balloons on Project LoonProc. SPIE2017100960Z100960Z-1100961Z-14

H. HemmatiNear-earth Laser CommunicationsCRC PressBoca Raton, FL, USA2009Chapter 3.

S. Karp and L. B. StottsFundamentals of Electro-Optic Systems DesignCambridge University PressCambridge, UK2013Chapter 10

H. Henniger and O. WilfertAn introduction to free-space optical communicationRadioengineering201019203212

S. G. Lambert and W. L. CaseyLaser Communications in SpaceArtech HouseNorwood, MA, USA1995Chapter 3

V. V. Mai and H. KimAdaptive beam control techniques for airborne free-space optical communication systemsAppl. Opt.20185774627471

A. A. Farid and S. HranilovicOutage capacity optimization for free-space optical links with pointing errorsJ. Lightwave Technol.20072517021710

G. T. Djordjevic, M. I. Petkovic, M. Spasic, and D. S. AnticOutage capacity of FSO link with pointing errors and link blockageOpt. Express201524252619

Moll F., Horwath J., Shrestha A., Brechtelsbauer M., Fuchs C., Navajas L. A. M., Souto A. M. L., and Gonzalez D. D.Demonstration of high-rate laser communications from a fast airborne platformJ. Sel. Areas Commun.20153319851995

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