Ionospheric waves
by
Dr Alicreance Hiyadutuje
Date: February 11, 2025 from 11:00 AM West African Time (WAT)
Venue: Online via zoom (link is given below, check also https://lms.cesst.org/ )
Abstract
The law of conservation of energy state that: “energy is neither created nor destroyed”, it can only change into different forms, that is called the transformation and/or can move from one place to another, that is known as the transfer. Most of the Earth’s magnetospheric energy input comes from the Sun as solar wind, Coronal Mass Ejections known as the CMEs, and solar flares. As a result this energy input, different phenomena may take place within the magnetosphere. Waves are examples of some of the phenomena that are caused by the space and/or terrestrial weather. Types of waves are given . For example, Atmospheric waves such as planetary, tides, and Atmospheric Gravity Waves (AGWs) are defined. AGWs, Perkins Instability and other mechanisms that cause the Travelling Ionospheric Disturbances (TIDs) are described. Groups of AGWs/TIDs are discussed. At the end of the presentation, other different mechanisms that can cause TIDs are discussed. Based on the previous results, we also discuss TIDs impacts on the High Frequency (HF) communication.
Biography of Dr. Alicreance Hiyadutuje
Dr. Alicreance Hiyadutuje is a physicist specializing in ionospheric studies. He holds a Ph.D. from the University of Kwazulu Natal (UKZN). Professionally, Dr. Hiyadutuje has held various teaching positions, including teaching natural sciences and tutorial assistant and assistant lecturer in physics at different institutions. Currently, he is a Postdoctoral Researcher at the South African National Space Agency (SANSA), studying ionospheric irregularities. His research primarily centers on ionospheric disturbances during magnetic storms. Dr. Hiyadutuje's work has been recognized within the academic community, with publications in the Journal of Geophysical Research (JGR) and the Journal of Atmospheric and Solar-Terrestrial Physics (JASTP). He attended different conferences at SuperDARN, IUGG, IAGA-IASPEI, and AGU. Notably, he has explored the modulation of E-region near-range echoes by Traveling Ionospheric Disturbances also known as TIDs, as detailed in his publication "First Observations of E‐Region Near Range Echoes Partially Modulated by F‐Region Traveling Ionospheric Disturbances Observed by the Same SuperDARN HF Radar."
Join Zoom Meeting
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Date: January 28, 2025
Time: 11 – 15 hrs (WAT)
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The AfNWA-ISP 2024 call for applications for early career women in astronomy in Africa (within 5 years of PhD) is now open. This is the 4th edition of the AfNWA-ISP awards, which aim to recognize the scientific achievements and contributions to society of women in astronomy in Africa.
We strongly encourage all early career researchers in astronomy in Africa who identify themselves as women to apply.
All information is available on AfNWA (https://afnwa.org/nominations-for-the-women-in-astronomy-in-africa-award-2024/#more-598) and AfAS (https://www.africanastronomicalsociety.org/2024/12/13/nominations-for-the-women-in-astronomy-in-africa-award-2024/) websites.
The form for applications is given on this link.
The deadline for nominations is 5 January 2025.
We are excited to announce that the FAST4Future Astronomy Summer School will commence next week, running from Monday to Friday, November 25 - 29, 2024. This program offers an incredible opportunity to dive deep into fascinating courses in astronomy.
Participants are encouraged to complete their registration through our Learning Management System (LMS) at: https://lms.cesst.org/
Don’t miss this chance to expand your knowledge and engage with experts in the field!
We look forward to welcoming you next week!
FAST4Future!
More info: https://www.scuolasuperiore.unich.it/node/7244
OBJECTIVES:
With the ARTEMIS exploration program bringing a new human crew to the lunar surface in 2026 as the first phase for the construction of a permanent human base, preparatory activities for the study of landing sites by combining multi-sensor data of different resolution and scale are fundamental for defining potential in situ resource utilization (ISRU). With this project we want to propose an integrated approach for data analysis aimed at detailed geological analysis for the definition and valorization of in situ resources for the ISRU through the production of a geological cartography with standardization of the units that allows the definition of guidelines for the characterization of the new landing sites planned in the south pole of the Moon.
Currently, thanks to the availability of better spatial resolution orbital data together with remote spectral data to determine the composition of the surface material, it has been possible to review the geological interpretation of the Apollo landing sites [1-4] providing new details on the stratigraphic evolution of rock units and their correlation with samples brought to Earth. Preliminary work on geological mapping applied to the ISRU [5] highlighted the potential of the Apollo 17 site thanks to the geological diversity and the type of rocks that can allow the successful extraction of hydrogen and methane.
For this reason, the research activities will focus on the Apollo 17 site following the cartographic approach of [1-4] adding both a morphological and stratigraphic study deriving from the photographic repertoire acquired by the astronauts, and the compositional information of the rock samples and soil brought to Earth and available in the NASA Curation Office archive.
Based on the study and the geothematic maps that will be produced, analyzes will be carried out on the potential of the mapped material for the ISRU. The integrated approach of different types of data (multimission - multisensor - multispectral) for detailed and standardized geological cartography is fundamental for future studies of lunar landing sites. The data will be processed and/or calibrated and then inserted into a GIS system for the analysis and creation of digital maps. This modus operandi will constitute a model that can be replicated in other sites.
The PhD student will spend 6-months abroad working at the Institut für Planetologie, Westfälische Wilhelms-Universität in Münster (tutor C. van der Bogert) to familiarize with the lunar dataset and cartographic methods. This institute in Münster has a long experience on geological mapping of the Moon. In the final part of the project the student will work at the ASI-SSDC to upload the produced maps into the MATISSE online tool to make it accessible to the scientific community. MATISSE is the ASI-SSDC webtool dedicated to Solar System exploration missions, capable of showing the results both in classic two-dimensional visualizations, showing the data projected directly onto the three-dimensional shape of the selected target. In particular, this activity will be
integrated into the current development of the tool aimed at planetary geology, expanding the possibility of searching for data also on the basis of advanced information available from geological maps.
In summary, the activities to be carried out will be:
1. bibliographic research and review of available geological maps - 3 months
2. selection of the areas of interest to analyze in detail, data processing and project
preparation in the GIS environment of the study area – 6 months
3. period abroad to acquire knowledge of lunar geological cartography – 6 months
4. cartography of the chosen sites – 12 months
5. definition of guidelines for the classification of geological units and potential values
for the ISRU - 3 months
6. data entry in MATISSE - 3 months
7. thesis writing – 3 months
More info: https://www.scuolasuperiore.unich.it/node/7244
Bibliographic references:
[1] Iqbal W. et al. (2019) Geological mapping and chronology of lunar landing sites: Apollo 11, Icarus,
Volume 333, Pages 528-547
[2] Iqbal W. et al. (2020) Geological mapping and chronology of lunar landing sites: Apollo 12, Icarus,
Volume 352
[3] Iqbal W. et al. (2023) Geological mapping and chronology of lunar landing sites: Apollo 14, Icarus,
Volume 406
[4] Iqbal W. et al. (2024) New geological maps of Apollo 15 and Apollo 17 landing sites, LPSC, #1010
[5] van der Bogert et al. (2021) Science-rich Sites for In Situ Resource Utilization Characterization and End- to-end Demonstration Missions, Planet. Sci. J., 2 84
FAST4Future October Seminar
“Terrestrial field analogues for planetary research: some examples from the African continent”
Presenter: Prof. Fulvio Franchi
Affiliation of presenter: Dipartimento di Scienze della Terra e Geoambientali, Università di Bari – Aldo Moro (Italy)
Email of FAST4Future: info [at] cesst [dot] org Oct 22, 2024 10:00 AM Harare, Pretoria (CAT)
Join Zoom Meeting https://eu01web.zoom.us/j/66926213523?pwd=TaBmBHnNwPe7obdKWHBkUaSN4QrGqy.1
Meeting ID: 669 2621 3523
Passcode: 109735
Biography
After 9 years as Lecturer and Professor at the Botswana International University of Science and Technology (BIUST), I moved back to Italy where I am holding the position of Associate Professor at the Dipartimento di Scienze della Terra e Geoambientali, Università di Bari – Aldo Moro (Italy). I also have an Honorary Professorship at the University of the Witwatersrand (South Africa). After my PhD in Earth Science studying the astrobiological potential of Devonian carbonate mounds in the Moroccan Sahara, I have pursued a career at the crossroad between planetary science and carbonate sedimentology with a clear interest for biogeochemical pathways and astrobiology. Ever since my PhD in 2009 all my projects were deeply rooted in Africa working toward the creation of a Planetary Science community. In the past 5 years I have been awarded, as Coordinator (P.I.), two EC-funded projects, the Pan African Planetary and Space Science Network (PAPSSN) and FAST4Future (Focus on Africa Space Science for Future Development). I have successfully participated in two NERC projects and led my institution into the Europlanet 2024 Research Infrastructure funded by INFRAIA under Horizon2020. I coordinate the planetary field analogue Makgadikgadi Pans in Botswana as part of the Europlanet2024 Transnational Access and successfully organized more than 20 field trips in Angola, Botswana, Mozambique, Namibia, South Africa and Zimbabwe.
