Author Archives: Chuck

About Chuck

Retired research engineer. Recently published book "The Theory of Scintillation with Applications in Remote Sensing," John Wiley IEEE Press, 201

2022 Beacon Satellite Symposium

Posted on July 28, 2022 by Chuck

Scintillation history published in “100 Years of the International Union of Radio Science https://84pc27.p3cdn1.secureserver.net/wp-content/uploads/2022/07/ScintillationHistory.pdf Keynote talk: https://84pc27.p3cdn1.secureserver.net/wp-content/uploads/2022/07/KeynoteTalkBSS2022S.pptx

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HF Propagation Part 2

Posted on May 13, 2021 by Chuck

In HF Propagation we described the extension of the scalar forward propagation equations (FPE) to accommodate HF propagation in the ionosphere where polarization effects important. Looking ahead to comparing full-field simulations to ray trace results we introduced ray tracing. In … Continue reading →

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Ray Theory and Fourier Optics

Posted on May 8, 2021 by Chuck

Fourier optics, as introduced in the text book Fourier Optics by John Goodman, provides a framework for analyzing optical systems. Optical sources generate aperture fields, which then propagate freely until some configuration of optical elements generates a new aperture field. … Continue reading →

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HF Propagation

Posted on May 4, 2021 by Chuck

All of the analysis summarized on this website thus far has been based on the scalar wave equation, which ignores polarization. The constitutive relation is a temporally and spatially varying complex scalar function. The scalar function was introduced in The … Continue reading →

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Ionospheric Structure Modeling

Posted on May 3, 2021 by Chuck

Previous blogs have outlined the development of irregularity parameter estimation (IPE) as applied to ionospheric scintillation data and to simulations as described in Rino and Carrano and Rino, Carrano, and Yokoyama, respectively. The applications of IPE assume diagnostic measurements are … Continue reading →

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Equatorial Plasma Bubbles

Posted on August 21, 2018 by Chuck

An enduring challenge in characterizing ionospheric intermediate-scale irregularity structure is generating a three-dimensional model.  In-situ measurements provide one-dimensional scans, which must be reconciled with a higher dimensional model.  Physics-based three-dimensional realizations of the development of equatorial plasma bubbles have been … Continue reading →

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Irregularity Parameter Estimation for Intensity SDF

Posted on August 20, 2018 by Chuck

Irregularity parameter Estimation (IPE) was developed for estimating the intensity SDF from detrended intensity scintillation measurements.  As discussed in the blog, the original IPE procedure was replaced with an improved maximum likelihood estimator (MLE).  The MLE scheme was also used … Continue reading →

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Power-Law Parameter Estimation

Posted on August 20, 2018 by Chuck

The basic structure and dynamics of the ionosphere are captured by deterministic models.  At the next level, physics-based ionospheric simulations produce stochastic structure, which is characterized by a statistical model.  Statistical models characterize an ensemble of realizations that support well-defined … Continue reading →

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Two-Dimensional Phase-Screen Models

Posted on August 14, 2018 by Chuck

Simplified models that capture the essential elements of physical phenomena are used extensively.  The equivalent phase-screen model is a case in point, but the approximation is not overly constraining.  As as long as the structure encountered is statistically uniform or … Continue reading →

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Summary and 2018 Update

Posted on August 13, 2018 by Chuck

This website has been dormant since 2015.  The website was started as a platform for discussion related to my book published in 2011.  I have removed some of the blogs, which are out of date.  Blogs that clarified topics in … Continue reading →

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