Mr. Denis Bushuev Profile

Denis Bushuev

at BGU

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Proceedings Article | 9 December 2002 Paper

Analyzing performance of nanosatellite cluster: detector array receiver laser communication

Denis Bushuev, Debbie Kedar, Shlomi Arnon

Proceedings Volume 4821, (2002) https://doi.org/10.1117/12.450626

KEYWORDS: Scattering, Aerosols, Atmospheric modeling, Optical transfer functions, Turbulence, Receivers, Modulation transfer functions, Atmospheric optics, Detector arrays, Atmospheric particles

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This work presents research in the field of laser satellite communication between a cluster of nano-satellites and a ground station. The scenario under consideration is a cluster of nano-satellites, communicating by means of a laser beam with a detector array receiver, which is located on the Earth's surface and equipped with a common optical system for all incoming beams. A critical parameter, determining the successful receipt of a transmitted signal for a given configuration, is the angular separation between the satellites within the cluster. This separation must be retained to prevent critical overlapping of the spots on the detector. The maximum allowable overlapping is calculated in terms of given BER. The spatial spreading of the beams, caused by scattering from aerosols in different layers of the atmosphere, is calculated for the case of single scattering, as appropriate for the stratified model used. Turbulence influences the beam width especially for the case of short exposure. In this research a new approach is adopted to characterize the atmospheric channel using OTF (Optical Transfer Function) concepts from the field of imaging and remote sensing. We evaluate the effectiveness of this new approach inapplications where spatial spread is very important, and detector array feasibility is currently under investigation.

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