Weekly "Inverted Conference" Seminar in Remote Sensing & Communication
An Extroverted Team Approach to Graduate from AFIT with a World Class Publishable Thesis!
Open forum for all, but especially for students.
This Friday 3 pm is open to students (primarily Air Force Institute of Technology, but all invited) presenting a 15 min (or so) talk on what interests them. Open to any & all students, so pass the word. This is a good place for young folks to teach something new to old folks who still like to learn, & / or forgot what it was like to be young.
Date and Time
Location
Hosts
Registration
- Date: 05 Aug 2022
- Time: 03:00 PM to 04:00 PM
- All times are (UTC-04:00) Eastern Time (US & Canada)
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Add Event to Calendar
- Contact Event Hosts
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timothy.wolfe@afit.edu
tswolfe@ieee.org
- Co-sponsored by Wright-Patt Multi-Intelligence Development Consortium (WPMDC), The DOD & DOE Communities
Speakers
Ray Wasky
Off-azimuth refraction of propagating high frequency (HF) radio waves produced by ‘tilts’ in the ionosphere
A state-of-the-art 3-dimensional high frequency (HF) propagation model is used to model the effects of ionospheric tilt, to determine the degree to which off-azimuth propagation exits in the HF band (3-30 MHz). Off-azimuth propagation, where an HF signal travels out of the great circle plane between an OTHR and its intended target region, can create errors in determining the azimuthal position of airborne and surface ship targets, especially if these errors are greater than the azimuth beamwidth of the radar. These errors can vary as a function of transmission frequency, time of day, solar cycle sunspot number, elevation angle, and range to target.
Biography:
Formerly with the Johns Hopkins University Applied Physics Laboratory, various DoD contractors, Air Force Avionics Lab at WPAFB, and active duty with the US Army Missile Command. Extensive experience in electromagnetic propagation phenomenology, propagation modeling, radar systems engineering, space weather effects, and meteorological instrumentation. Wide-ranging field experience in radar and infrared/laser signature and propagation measurements, SAR calibration, and EO/IR missile seeker testing. Bachelors in E.E., Cleveland State University; M.S.E.E., University of Dayton; Post-graduate studies in E.E., The Ohio State University. Member U.S. National Committee for the International Union for Radio Science, Commission F; Life Member, Institute of Electrical and Electronics Engineers; Associate Editor, IEEE Antennas & Propagation Magazine.
Email:
Agenda
TITLE: Off-azimuth refraction of propagating high frequency (HF) radio waves produced by ‘tilts’ in the ionosphere and the implication for HF over-the-horizon radar (OTHR) operation.
ABSTRACT: A state-of-the-art 3-dimensional high frequency (HF) propagation model is used to model the effects of ionospheric tilt, to determine the degree to which off-azimuth propagation exits in the HF band (3-30 MHz). Off-azimuth propagation, where an HF signal travels out of the great circle plane between an OTHR and its intended target region, can create errors in determining the azimuthal position of airborne and surface ship targets, especially if these errors are greater than the azimuth beamwidth of the radar. These errors can vary as a function of transmission frequency, time of day, solar cycle sunspot number, elevation angle, and range to target.
Please pass the word & invite others.
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FEEDBACK please: if you have any ideas for a better day, time, place, forum for this exchange, please let me know.