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Proceedings Paper

Modeling the PDF for the irradiance of an uplink beam in the presence of beam wander
Author(s): Ronald Parenti; Richard J. Sasiela; Larry C. Andrews; Ronald L. Phillips
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Paper Abstract

Recent studies of ground-to-space beam propagation have revealed significant departures from Rytov theory when the beam diameter w0 is on the order of the atmospheric coherence width r0. It has been shown that such departures from Rytov theory are primarily a consequence of beam wander and other low-order aberrations. In this paper we discuss modeling of the probability density function (PDF) for uplink beams. In particular, we show how the PDF transitions from lognormal statistics when w0/r0 << 1 to the negative exponential distribution when w0/r0 >> 1. The most interesting regime is the transition region near w0/r0 = 1, where the statistical behavior of tracked and untracked beams differs significantly.

Paper Details

Date Published: 17 May 2006
PDF: 13 pages
Proc. SPIE 6215, Atmospheric Propagation III, 621508 (17 May 2006); doi: 10.1117/12.666547
Show Author Affiliations
Ronald Parenti, Lincoln Lab., Massachusetts Institute of Technology (United States)
Richard J. Sasiela, Lincoln Lab., Massachusetts Institute of Technology (United States)
Larry C. Andrews, Univ. of Central Florida (United States)
Ronald L. Phillips, Univ. of Central Florida (United States)

Published in SPIE Proceedings Vol. 6215:
Atmospheric Propagation III
Cynthia Y. Young; G. Charmaine Gilbreath, Editor(s)

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