BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York BEGIN:DAYLIGHT DTSTART:20270314T030000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:EDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20261101T010000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:EST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20261016T215040Z UID:2CA033BB-3C6D-4A31-94A8-17666D370563 DTSTART;TZID=America/New_York:20261117T103000 DTEND;TZID=America/New_York:20261117T113000 DESCRIPTION:When ionospheric plasma becomes turbulent\, radio signals that pass through it experience scintillation. Scintillation manifests as rando m fluctuations in phase and amplitude (and potentially in other quantities like polarization angle). The effect is similar to the optical twinkling of starlight that passes through lower-atmosphere turbulence. Ionospheric scintillation has the potential to impact systems like synthetic aperture radar (SAR)\, direct-to-device (D2D) satellite communications and Global N avigation Satellite System (GNSS) observations. This talk will first prese nt an overview of the propagation physics that leads to the practical mode l of the ionosphere as a phase changing screen ("phase screen"). We will t hen explore selected deterministic and random phase screen examples to gai n some intuition for amplitude and phase scintillation impacts. Finally\, we examine some recent applications of scintillation observations to deduc ing the physical state of the ionosphere\, such as the decay of equatorial plasma bubble (EPB) turbulence. Not only does scintillation allow us to t rack when and where ionospheric irregularities develop\, careful analysis may yield more quantitative physical details of the irregularity processes .\n\nSpeaker(s): Professor Ted Beach\, \n\nBldg: Kenny Cottle Conference R oom 202\, Boston College Newton Campus\, 885 Centre St\, Newton MA)\, Newt on\, MA\, Massachusetts\, United States LOCATION:Bldg: Kenny Cottle Conference Room 202\, Boston College Newton Cam pus\, 885 Centre St\, Newton MA)\, Newton\, MA\, Massachusetts\, United St ates ORGANIZER:mclee@bu.edu SEQUENCE:74 SUMMARY:Radio Wave Scintillation Propagation Models and Applications URL;VALUE=URI:https://events.vtools.ieee.org/m/586406 X-ALT-DESC:Description: <br /><p><span style="direction: ltr\;" data-olk-co py-source="MessageBody">When ionospheric plasma becomes turbulent\, radio signals that pass through it experience scintillation. Scintillation manif ests as random fluctuations in phase and amplitude (and potentially in oth er quantities like polarization angle). The effect is similar to the optic al twinkling of starlight that passes through&nbsp\;lower-atmosphere turbu lence. Ionospheric scintillation has the potential to impact systems like synthetic aperture radar (SAR)\, direct-to-device (D2D) satellite communic ations and Global Navigation Satellite System (GNSS) observations. This ta lk will first present an overview of the propagation physics that leads to the practical model of the ionosphere as a phase changing screen ("phase screen"). We will then explore selected deterministic and random phase scr een examples to gain some intuition for amplitude and phase scintillation impacts. Finally\, we examine some recent applications of scintillation ob servations to deducing the physical state of the ionosphere\, such as the decay of equatorial plasma bubble (EPB) turbulence. Not only does scintill ation allow us to track when and where ionospheric irregularities develop\ , careful analysis may yield more quantitative physical details of the irr egularity processes.</span></p> END:VEVENT END:VCALENDAR