CEDAR email: URGENT: Extended Abstract (or Summary paper) deadline is Saturday (Jan 20th) by 5.59pm Eastern (3.59pm Mountain)

[Geoff Crowley]

Dear Colleagues,



Greetings from snowy Boulder!

Time to think about warmer travel!

My apologies for this last minute invitation to Gran Canaria!



On behalf of the URSI AT-RASC, Session G02 conveners, I am delighted to bring to your attention session G02<https://www.atrasc.com/papersubmission.php#G>:: Nowcasting and Forecasting Travelling Ionospheric Disturbances for Ionospheric Weather and Mitigation Services (see session abstract below).

Please visit the conference website<https://www.atrasc.com/home.php> and submit your Extended Abstract (or Summary paper) to our session by January 20, 2024 at 4.59pm Eastern (2.59pm Mountain)



Sorry for the last moment notice!



Conveners: Geoff Crowley, David Altadill, Anna Belehaki, Sivakandan Mani



Abstract: Travelling Ionospheric Disturbances (TIDs) are plasma density fluctuations that propagate as waves through the ionosphere at a wide range of velocities and frequencies and play an important role in the exchange of momentum and energy between various regions of the upper atmosphere. TIDs are the ionospheric manifestation of internal atmospheric gravity waves (AGW) in the neutral atmosphere and are associated with auroral and geomagnetic activity and with lower atmosphere phenomena of non-space origin (e.g., severe tropospheric convection or passages of cold fronts, seismicity, volcanic activity, and artificially triggered events such as explosions). The exact physical mechanisms of TIDs formation, the trigger mechanisms, the basic properties and parameters of TIDs and their propagation direction from the source, how they dissipate with distance and how background ionospheric conditions affect their propagation, have still not been fully characterized or understood. Nevertheless, it is confirmed that TIDs constitute a threat for operational systems that use simple predictions of ionospheric characteristics and especially in ground-based and aerospace applications.

 The session invites contributions on TIDs identification and tracking experiments and methodologies, on models for nowcasting and forecasting TIDs and corresponding ionospheric weather services, descriptions of operational issues caused by TIDs, and possible mitigation technologies able to prevent degradation of the applications concerned.



Thank you.

With best regards


Geoff


Geoff Crowley

Orion Space Solutions

(an Arcfield company)

210-834-3475
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