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DTSTART:20210314T030000
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DTSTAMP:20210101T162803Z
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DTSTART;TZID=America/New_York:20201118T120000
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DESCRIPTION:his presentation covers two important aspects of HF (high frequ
 ency) communications: the modulation types most commonly used for HF commu
 nications as well as the fundamentals of HF propagation.\n\nModulation typ
 es covered in this presentation include both double-sideband AM and single
 -sideband as well as narrowband FM. For digital modes\, the use of amplitu
 de shift keying (ASK) and frequency shift keying (FSK) are also discussed.
 \n\nThe propagation portion of this webinar starts with a general introduc
 tion to HF and the main HF propagation modes (direct wave / line of sight\
 , ground or surface wave\, and skywave). Since skywave is the most unique 
 and widely used HF propagation mode\, an introduction to the ionosphere an
 d the characteristics of the different ionospheric layers is then provided
 \, followed by a discussion of unusual ionospheric events and an overview 
 of the different ways in which the state of the ionosphere can be quantifi
 ed.\n\nThe presentation concludes with a short summary and a question and 
 answer session.\n\nThis webinar is generously sponsored by the Association
  of Old Crows\, Granite State Chapter.\n\nCo-sponsored by: Association of 
 Old Crows\, Granite State Roost\n\nSpeaker(s): Paul Denisowski\, \n\nAgend
 a: \nThis presentation will begin on Wednesday\, November 18\, 2020 at 12:
 00 PM Eastern Standard Time.\n\nAudience members may arrive 15 minutes in 
 advance of this time.\n\nVirtual: https://events.vtools.ieee.org/m/247882
LOCATION:Virtual: https://events.vtools.ieee.org/m/247882
ORGANIZER:ian.armstrong@ieee.org
SEQUENCE:1
SUMMARY:Introduction to HF: Modulation and Propagation sponsored by AOC Gra
 nite State
URL;VALUE=URI:https://events.vtools.ieee.org/m/247882
X-ALT-DESC:Description: <br /><p>his presentation covers two important aspe
 cts of HF (high frequency) communications:&nbsp\;the modulation types most
  commonly used for HF communications as well as the fundamentals of HF pro
 pagation. &nbsp\;</p>\n<p>Modulation types covered in this presentation in
 clude both double-sideband AM and single-sideband as well as narrowband FM
 .&nbsp\;For digital modes\, the use of amplitude shift keying (ASK) and fr
 equency shift keying (FSK) are also discussed. &nbsp\;</p>\n<p>The propaga
 tion portion of this webinar starts with a general introduction to HF and 
 the main HF propagation modes (direct wave / line of sight\, ground or sur
 face wave\, and skywave).&nbsp\;Since skywave is the most unique and widel
 y used HF propagation mode\, an introduction to the ionosphere and the cha
 racteristics of the different ionospheric layers is then provided\, follow
 ed by a discussion of unusual ionospheric events and an overview of the di
 fferent ways in which the state of the ionosphere can be quantified. &nbsp
 \;</p>\n<p>The presentation concludes with a short summary and a question 
 and answer session.</p>\n<p>This webinar is generously sponsored by&nbsp\;
 <strong>the Association of Old Crows\, Granite State Chapter</strong>.</p>
 <br /><br />Agenda: <br /><p>This presentation will begin on Wednesday\, N
 ovember 18\, 2020 at 12:00 PM Eastern Standard Time.<br /><br />Audience m
 embers may arrive 15 minutes in advance of this time.</p>
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