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

Propagation In Anisotropic Media 2

A configuration space model generates structure realizations from random collections of striations. The defining parameters can be selected to support two-component power-law models. Configuration-space realizations are ideally suited for propagation simulations generated by integrating the parabolic wave equation. A paper … Continue reading

Posted in Uncategorized | 477 Comments

Propagation in Structured Anisotropic Media

A configuration space model generates structure realizations from random collections of striations. The defining parameters can be selected to support two-component power-law models. Configuration-space realizations are ideally suited for propagation simulations generated by integrating the parabolic wave equation. A paper … Continue reading

Posted in Uncategorized | 86 Comments

Configuration Space Models

The blog on irregularity parameter estimation  (IPE) introduced a paper that used realizations of a stochastic processes with a prescribed spectral density function (SDF).  Such realizations are generated by imposing the square root of the desired SDF on a collection … Continue reading

Posted in New Results | 137 Comments

Equatorial Plasma Bubbles

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

Posted in New Results | 155 Comments

Irregularity Parameter Estimation for Intensity SDF

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

Posted in Uncategorized | 359 Comments

Power-Law Parameter Estimation

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

Posted in New Results | 93 Comments

Two-Dimensional Phase-Screen Models

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

Posted in Propagation Models | 50 Comments

Summary and 2018 Update

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

Posted in General Interest | 1,194 Comments

A Comparison of Phase Locked Loops and Frequency Hypothesis Tracking

Processing low orbiting beacon satellite data has been a challenge largely because of the limited vehicle space for a VHF, UHF, L-band antenna system. The effective antenna patterns severely limit range of uniform illumination range with a common phase center. … Continue reading

Posted in Signal Processing | Comments Off on A Comparison of Phase Locked Loops and Frequency Hypothesis Tracking

IES 2015 Paper

IES2015Rino is an oral presentation of the new material introduced in the previous post Application of Wavelet Based Analysis to C/NOFS Ionospheric Density Measurements.  

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