Title

Pdf Models For Uplink To Space In The Presence Of Beam Wander

Keywords

Atmospheric turbulence; Pdf model; Scintillation; Strehl ratio

Abstract

In this paper we discuss several models for the probability density function (pdf) of the irradiance of a Gaussian-beam wave from ground to space. We consider cases of tracked beams and untracked beams, both of which involve a certain amount of beam wander. The various pdf models that we introduce are all compared with simulation data over a broad range of beam diameters. We find that certain well-known models fit the simulation data m one of the regimes defined by the ratio of beam radius W 0 to Fried's parameter r 0 (W 0/r 0 ≪1. W 0/r 0 ≫ 1), W 0/r 0 ≫ 1), but not generally m the other regimes. This is true for tracked beams as well as untracked beams. Two new pdf models, developed here as a modulation of either the gamma-gamma pdf or the gamma pdf. are shown to provide excellent fits to the simulation data over all three regimes defined above.

Publication Date

11-15-2007

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

6551

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.720681

Socpus ID

35948989312 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/35948989312

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