Final program, Abstract booklet, Images and videos captured during ISEA-15 are now available in Update Panel.
Session 1 : Equatorial E- and F-region irregularities: Cause and effects
Conveners : Amit K. Patra, NARL, India ; Fabiano Rodrigues, UTD, USA
MSO : Jonathan J. Makela, UI, USA.
This session covers contributions related to fundamental and applied aspects of E- and F-region ionospheric irregularities occurring at equatorial and low latitudes. The session welcomes, in particular, presentations related to studies of ionospheric irregularities associated with the equatorial electrojet, valley region, 150-km echoes, and those associated with equatorial spread F events during geomagnetically quiet and/or disturbed conditions. Presentations related to experimental investigations of the conditions leading to the genesis, development and decay of ionospheric irregularities using ground- and space-based instrumentation are invited. Contributions describing current efforts associated with ongoing and upcoming rocket campaigns, cubesats and new ground-based instruments are encouraged. Finally, the session also welcomes contributions describing new results of numerical modeling efforts towards a better description of ionospheric irregularities, and presentations related to studies of the effects of the turbulent equatorial ionosphere on various applications (GNSS, IRNSS, OTH radars, remote sensing, etc.).
Session 2 : Longitudinal dependence of equatorial electrodynamics
Conveners : Larisa P. Goncharenko, MIT Haystack Observatory, USA ; Geeta Vichare, IIG, India
MSO : Endawoke Yizengaw, BC, USA.
Analysis of longitudinal differences in thermospheric and ionospheric parameters can illuminate variety of mechanisms responsible for upper atmospheric variability as well as the drivers of longitudinal differences in scintillations. Recent advances in networks of distributed instruments provide new evidence of longitudinal differences on a large variety of spatial and temporal scales. The main focus of this session is to examine new evidence of longitudinal variations in equatorial and low-latitude electrodynamics (drift/electrojet, neutral wind, and gravity waves and tides) as well as thermospheric and ionospheric parameters on time scales from hours to decades and spatial scales from few degrees to the entire globe. The observations during geomagnetic quiet as well as disturbed times are solicited. This session invites contributions that discuss space-borne and ground-based observations, and theory/modeling of the mechanisms responsible for the longitudinal dependence of equatorial and low-latitude ionosphere.
Session 3 : Mesosphere Ionosphere Thermosphere coupling at low- and mid-latitudes
Conveners : Kazuo Shiokawa, ISEE, Japan ; Sundararajan Sridharan, NARL, India
MSO : Philip J. Erickson, MIT Haystack Observatory, USA.
Coupling of the mesosphere, ionosphere, and thermosphere (MIT) is a key science issue in the Earth’s upper atmosphere. During geomagnetic quiet times, the coupling mainly occurs though wave motions of various time and spatial scales ranging from sound waves, gravity waves, tides, to planetary waves. This coupling contributes to mesospheric oscillations, thermospheric midnight temperature maximum and ionospheric variabilities, namely, electrojet strength, electron density, sporadic E, equatorial ionization anomaly, and spread F, etc. It is also interesting to see how the dynamics/electrodynamics/composition of this coupled system varies in response to the prompt penetration and disturbance dynamo electric fields caused by the storms. The ionospheric plasmas can also affect dynamics of the thermosphere through the ion drag. These coupling processes also affect the variability of MLT over long-term and show trends with respect to solar activity. In this session, we focus on these various topics related to the mesosphere-ionosphere-thermosphere coupling at low- and mid-latitudes during quiet and disturbed times. We welcome results obtained from recent satellite measurements, ground-based instruments, as well as recent global and regional modeling efforts.
Session 4 : Mid- and low-latitude effects of global atmospheric wave coupling
Conveners : Subramanian Gurubaran, IIG, India ; Erdal Yigit, GMU, USA
MSO : Duggirala Pallam Raju, PRL, India.
This session focuses on the dynamical aspects of atmosphere-ionosphere coupling at middle- and low-latitudes from the perspective of vertical/lateral coupling by global atmospheric waves. There has been growing interest in recent years to understand the role of atmospheric wave forcing in determining the state of the upper atmosphere during geomagnetic quiet conditions. The challenge so far has been to associate the variabilities observed at ionospheric heights with distant wave sources as the observational knowledge about many of these sources is limited. For this session, studies dealing with this aspect that make use of ground-based experimental campaigns, satellite observations, and numerical model simulations are solicited. Results on a multitude of wave effects on the atmosphere-ionosphere system, involving chemical, dynamical and electrodynamical processes are encouraged for submission. This session will aim to review the progress made in these areas and propose future directions.
Session 5 : Space weather effects on low- and mid-latitudes
Conveners : Anthea Coster, MIT Haystack Observatory USA ; Dibyendu Chakrabarty, PRL, India
MSO : Claudia Stolle, GFZ, Germany.
The focus of this session is on space weather effects at low and mid latitudes. Space weather phenomena include electron density gradients which can affect GNSS range solutions; the formation of severe small-scale plasma irregularities which can lead to trans-ionospheric radio wave scintillations that impact aeronautical and marine navigation; atmospheric neutral density perturbations which can impair the accuracy of satellite orbit predictions; and ionospheric currents that can induce ground-electric currents which can impact the electrical grid. Many, but not all of these effects, are generated during geomagnetic storms and substorms and their associated variability of electric fields and neutral density and winds. This session solicits contributions that address processes in the ionosphere and upper atmosphere leading to space weather effects. Works based on observations and/or modeling results as well as contributions that discuss mitigation strategies are highly welcome.
Session 6 : Results from new techniques, experiments, and campaigns
Conveners : Juha Viernen, UIT, Norway ; Raj Kumar Choudhary, SPL, India
MSO : Marco Milla, JRO, Peru ; Mamoru Yamamoto, RISH, Japan.
This is an open session for the scientific community to report observations from new instruments and new observation programs that aim to explore the equatorial mesosphere, thermosphere, and ionospheric regions. Contributions showing results that make use of newly developed observation techniques or newly established instrumentation networks are invited. We also invite contributions that show new results from ground-based, and/ or space-borne instrumentation. This instrumentation may be recently deployed, redeployed, or may have recently been upgraded. Examples of relevant instrumentation include, but are not limited to digital ionosondes, magnetometers, GNSS receivers, coherent or incoherent backscatter radars, VLF/ELF receivers, rockets, space probes, optical imagers, Fabry-Perot interferometers, etc.
Session 7 : Future trends, opportunities, and challenges in low-latitude aeronomy
Conveners : Jorge L. Chau, IAP, Germany ; Tarun Kumar Pant, SPL, India
MSO : Clezio De Nardin, INPE, Brazil ; Mamoru Yamamoto, RISH, Japan.
Low-latitude aeronomy is a mature field, however with the advent of new instruments, techniques, satellite missions, improved coupled models, etc., its understanding and corresponding utility for society can be significantly improved. This session will be devoted to ongoing and future perspectives of expected improvements in both basic as well as applied sciences. Topics of this session include: Altitude and latitude coupling as drivers for low latitude dynamics and ionospheric irregularities, extracting new information from existing and improved ground- and satellite-based techniques (e.g., radar imaging, dynamical parameters from network measurements, ICON, GOLD, COSMIC2, Swarm, among others), integrating large datasets (multiple instrument datasets, model output/dataset integration), next-generation numerical models of the coupled geospace system, and meeting the operational needs for space weather predictions. This session will be composed of invited talks. If you feel you can contribute to the session, please contact the conveners.