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

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

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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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AGU 2013 Poster and Supplemental Material

Tomographic reconstruction of ionospheric electron density profiles from GPS satellite measurement is being used extensively for global ionospheric monitoring.  For the most part, the reconstruction process is a constrained iterative process.  The results are sensitive to errors and initial conditions.  … Continue reading

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Phase Screen Models for Numerical Computation

To the extent that propagation disturbances can be approximated by an equivalent phase-screen, there are analytic models that allow computation of the power-spectrum of the intensity of the field as it propagates away from the phase screen.  The analysis involves … Continue reading

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Beacon Satellite Symposium 2013 Keynote Talk

The following attachment is the keynote talk presented at the Beacon Satellite Symposium, Bath England, July 8, 2013 KeynoteTalk

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Oblique Propagation

Chapter 4 of my book develops a computational framework for beacon satellite propagation.  With a reference coordinate system centered at ionospheric heights, even small propagation angles lead to very large displacements in the observation plane.  To avoid this problem, a … Continue reading

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Statistical Theory of Scintillation-Update

In Chapter 3 of my book the system of differential equations that characterize the propagation of complex two-frequency field moments in irregular media were developed. The attached note reviews this material and its connection to the original and most cited … Continue reading

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Optical Applications of Full Diffraction

Revised May 30, 2011 Earlier blogs on this topic discussed the relation of  The Theory of Scintillation with Applications to Remote Sensing, which uses the forward propagation method (FPE) , to optical methods based on the Huygens-Fresnel construction.  The revised … Continue reading

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What’s the Book About

The theory of scintillation is about electromagnetic wave propagation in structured media.  But why does a phenomenon that has been studied for nearly a century now merit a new theoretical expose?  One part of the answer is that the essential … Continue reading

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Strong Focusing–The LOGO

So what is the logo all about?  As an electromagnetic wave field propagates in a structured medium, the structure is first imparted to the phase of the evolving wave field. As the wave field continues to propagate, the wave intensity … Continue reading

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