Software Listing of Author : "Charles Rino"

2-D Propagation code similar to parabolic wave codes but with complete boundary conditions for irregular surfaces. Induced boundary surface currents are retained. Documentation and examples are provided. Basic code structure can be extended to fully 3-Dimensional environments.

  • Platform: Matlab, Scripts

Reproduce Chapter 2 propagation examples in The Theory of Sintillation with Applications in Remote Sensing. Configured to reproduce beam propagation and simulation examples. Documentation includes graphics generated by simulation code.

  • Platform: Matlab, Scripts

Full diffraction 3-D propagation simulator for radio and light propagation in media with both random and background structure. Examples with documentation configured to demonstrate propagation in turbulent media with Earth's atmosphere as example. Examples will reproduce screen-shot logo and .avi movie version.

  • Platform: Matlab, Scripts

A function for launching a bundle of rays from a fixed point in a propagation region with a specified refractive index. Documentation with examples are provided to illustrate radion beam propagation and propagation in the Earth's atmosphere.

  • Platform: Matlab, Scripts

Emulate Babbage Difference Engine 2 at Mountain View Computer History Museum Program to emulate evaluation of 7th order polynomial with 31 digit accuracy for Difference Engine designed by Charles Babbage around 1830. Two versions of the engine were build in the 20th century by the London Science Museum. One, owned by Nythan Myhrvold, currently resides at the Mountain View Computer History Museum http://www.computerhistory.org/babbage/ The programs calculates the numbers in the each of the 8 31-digit number columns (registers) for each crank of the manually operated engine. Some background and a detailed description of how it works are included (Section 3). Just load and and run the program.

  • Platform: Matlab, Scripts

A set of programs for simulating beacon satellite propagation through the Earth's ionosphere. Standard satellite orbit parameters and an earth magnetic field model are used to define the propagation paths. PropCode3 uses these inputs to calculate a measurement field realization. Signal modulation is synthesized by scanning the field along the translation direction determined from the orbit parameters. Documentation and examples are include

  • Platform: Matlab, Scripts

A robust function that uses frequency-domain -i/frequency filtering to integrate a function. Edge-tapering is used to minimize aliasing errors.

  • Platform: Matlab, Scripts

A collection of utilities for translating GPS coordinates to related coordinate systems (Earth Centere Fixed, Topocentric, UTM) with auxiliary routins for horizon computation and ray ellipsoid intercepts.

  • Platform: Matlab, Scripts

MATLAB implementation of IGRF11 fortran code as function for calculating Earth mean magnetic field. Implementation has been modified to default to GPS reference coordinates with output B components North, East, and Vertical. Spherical harmonic coefficients are derived from downloaded Excel file. http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html Screenshot created by Demo_igrf11syn

  • Platform: Matlab, Scripts

A modified version of the SGP4 code used for standard satellite orbit computation using two-line elements (TLE). The modified code outputs satellite positions and velocity in ECF coordinates and universal time from EPOCH. Utilities are provided to calculate point-to-point angle, range rates, TCS positions, constant altitude intercepts and velocities. Outputs are collected in a structure and retained in a *.mat file for subsequent display and Beacon satellite data analysis applications. Documentation and examples are provided. Code uses GPS_CoordinateXform and IGRF utilities available from MATLAB Central.

  • Platform: Matlab, Scripts

A collection of utilities for computing the impact propagation disturbances on satellite radio transmissions. Applications include frequency and temporal coherence estimates and examples that use waveform simulations. Models for common fading distributions and waveform detection probabilities in noise and fading environments are included. Documentation and examples are included.

  • Platform: Matlab, Scripts
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