CEDAR email: URGENT: URSI Canary Islands Mtg: Deadline Extended to Feb 1st- Abstract (or Summary paper) deadline is next Thursday (Feb 1st) by 5.59pm Eastern (3.59pm Mountain)

[Liying Qian]

*From Geoff Crowley:*

Dear Colleagues,
I wanted to let you all know that the abstract submission deadline for the
URSI meeting in the Canary Islands has been extended to February 1st.

The Extended Abstract (or Summary paper) submission site is at:
https://www.atrasc.com/papersubmission.php

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* February
1st, 2024 at 4.59pm Eastern (2.59pm Mountain)*





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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