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Jan Gieseler

@jangieseler.bsky.social
110 followers 129 following 42 posts

Space physicist working at University of Turku @utu.fi on energetic charged particles measured by the heliospheric spacecraft fleet, using and providing open-source tools. gieseler.me. He/him.

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Jan Gieseler @jangieseler.bsky.social · 22/09/2026
BepiColombo measured Mercury's particle bombardment up close www.utu.fi/en/news/news...
utu.fi
BepiColombo measured Mercury's particle bombardment up close
The results help assess the impact of space storms on Mercury's surface and on Earth's atmosphere.
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Jan Gieseler @jangieseler.bsky.social · 11/09/2026
Uh, that really looks like the blueprint of an asshole company.
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Jan Gieseler @jangieseler.bsky.social · 11/09/2026
Aaaand the issue has been deleted. Weird stuff. I also got the email, and I have no idea what "apollo" should be.
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Reposted by Jan Gieseler
Nature Astronomy @natastron.nature.com · 08/09/2026
Planetary shielding and surface precipitation of solar energetic particles during BepiColombo’s close Mercury flyby ☄️
dlvr.it
Planetary shielding and surface precipitation of solar energetic particles during BepiColombo’s close Mercury flyby
Nature Astronomy, Published online: 08 September 2026; doi:10.1038/s41550-026-02914-6BepiColombo’s flyby at just 165 km from Mercury observed sustained precipitation of energetic solar protons and electrons onto the planet’s surface, with potentially long-term impact on its weathering and mineralogy.
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Jan Gieseler @jangieseler.bsky.social · 10/07/2026
22 so far and the rate is increasing again... 🥲
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Jan Gieseler @jangieseler.bsky.social · 09/07/2026
Am I the only one receiving @egu.eu's email on autumn elections over and over again? 🤔
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Jan Gieseler @jangieseler.bsky.social · 15/06/2026
DASH brings together developers, data practitioners & scientists to discuss software, algorithms & analysis methods in heliophysics. 🛰️ Co-located: IHDEA promotes common standards for data sharing & interoperability. 🌐 All levels welcome: talks, posters & collaboration! ℹ️ dash.heliophysics.net
dash.heliophysics.net
DASH Meeting 2026
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Jan Gieseler @jangieseler.bsky.social · 15/06/2026
📢 DASH/IHDEA 2026 registration & abstract submission are now open! 🗓️ Oct 5–9, 2026 | Dublin, Ireland 📝 Abstract deadline: 29 July 2026 📋 Registration closes: 4 September 2026 🔗 indico.dias.ie/event/2/ ☀️ #Heliophysics #DASH #IHDEA
Promotional banner for DASH + IHDEA 2026. The background shows a stylized Dublin skyline at dusk, featuring the Samuel Beckett Bridge, with a large artistic rendering of the Sun dominating the left side and subtle data visualization overlays throughout. A satellite is visible in the top right corner. Text reads: "DASH + IHDEA 2026 will be held in Dublin, Ireland! 5–9th October 2026, Royal Irish Academy of Music, Dublin." Logos for DIAS, DASH, and IHDEA are shown in the bottom right corner.
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Jan Gieseler @jangieseler.bsky.social · 02/06/2026
Good reminder! I've been wanting to try it for a long time. Was using marp.app for an exercise series during Covid, which made sense bc it were mostly equations. But I missed drag & drop and quickly run into limitations e.g. lacking support for columns, but I see Quarto has that. Maybe next time...
marp.app
Marp: Markdown Presentation Ecosystem
Marp (also known as the Markdown Presentation Ecosystem) provides an intuitive experience for creating beautiful slide decks. You only have to focus on writing your story in a Markdown document.
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Jan Gieseler @jangieseler.bsky.social · 02/06/2026
Well, I'd say it still somewhat is (at least the best we have). I am just avoiding Acrobat as much as possible (one might need to keep it installed for signing things, though). There are alternatives such as Sumatra PDF or Skim. And I haven't really tried out github.com/Stirling-Too...
github.com
GitHub - Stirling-Tools/Stirling-PDF: #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere
#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere - Stirling-Tools/Stirling-PDF
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Jan Gieseler @jangieseler.bsky.social · 29/05/2026
Looking for doing a PhD in #heliophysics? ☀️ Our group at @utu.fi in Turku 🇫🇮 is hiring for a multidisciplinary project that merges spacecraft data with artificial intelligence to solve open questions on the generation of solar energetic particle (SEP) events! ats.talentadore.com/apply/doctor...
ats.talentadore.com
Doctoral Researcher / Project Researcher / Research Assistant - fixed-term position in Space Physics
The Space Research Laboratory (SRL) at the Department of Physics and Astronomy in the University of Turku invites applications for a three-year Project Researcher / Doctoral Researcher / Research Assi...
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Jan Gieseler @jangieseler.bsky.social · 27/05/2026
Hi, I'm not totally sure if I'm already on the list, but just to be safe: I would like to post here!
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Adrian Price-Whelan @adrian.pw · 20/04/2026
A cool demonstration of @astropy.org + SunPy functionality with Artemis II! sunpy.org/posts/2026/a... 🔭
A coordinate-aligned view of the solar eclipse viewed by the Artemis II mission.
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Jan Gieseler @jangieseler.bsky.social · 02/04/2026
Direct link to school registration: docs.google.com/forms/d/e/1F...
docs.google.com
SPEARHEAD School 2026 – Application / Registration
The SPEARHEAD School on Cosmic Rays, Solar Energetic Particles (SEP), and Space Weather takes place at Christian-Albrechts-Universität zu Kiel (CAU), Germany, 3–8 September 2026. The school targets B...
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Jan Gieseler @jangieseler.bsky.social · 02/04/2026
➡️ The School will be followed by Workshop 3, showcasing the latest SPEARHEAD developments, including the best student presentation. 📚 Learn more: spearhead-he.eu/spearhead-sc... spearhead-he.eu/school-works...
spearhead-he.eu
SPEARHEAD School 2026 – Registrations Open! | SPEARHEAD
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Jan Gieseler @jangieseler.bsky.social · 02/04/2026
🔬 This hybrid event offers hands-on training with SPEARHEAD (spearhead-he.eu) tools and data. Expect a practical, interactive learning experience designed to strengthen skills, collaboration, and community engagement.
spearhead-he.eu
SPEARHEAD | SPEcification, Analysis & Re-calibration of High Energy pArticle Data
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Jan Gieseler @jangieseler.bsky.social · 02/04/2026
📢 SPEARHEAD School & Workshop 2026 – Registrations Open! ☀️ We are excited to announce the SPEARHEAD School, taking place 4–8 September 2026 in Kiel, Germany, hosted by bsky.app/profile/uni-...
Advertisement poster for school & workshop, showing same info as in post on top of the skyline of the city Kiel
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Reposted by Jan Gieseler
uksolarphysics.bsky.social @uksolarphysics.bsky.social · 12/02/2026
Save the date! 2026 DASH/IHDEA Meeting The 2026 DASH / IHDEA Meeting will take place 5-9 October 2026, hosted by the Dublin Institute for Advanced Studies (DIAS) in Dublin, Ireland, with virtual participation supported. The DASH (Data Analysis and Software in Heliophysics) and IHDEA (International…
uksolphys.org
Save the date! 2026 DASH/IHDEA Meeting
The 2026 DASH / IHDEA Meeting will take place 5-9 October 2026, hosted by the Dublin Institute for Advanced Studies (DIAS) in Dublin, Ireland, with virtual participation supported. The DASH (Data Analysis and Software in Heliophysics) and IHDEA (International Heliophysics Data Environment Alliance) meetings bring together scientists and software developers working on data analysis, algorithms, community software, data systems, and standards across heliophysics - from the Sun to geospace and beyond.
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Reposted by Jan Gieseler
ESA Space Science @science.esa.int · 01/09/2025
Our #SolarOrbiter has split the flood of energetic electrons flung out into space from the Sun into two groups, tracing each back to a different kind of outburst from our star 👉 www.esa.int/Science_Expl... 1/3 🔭 🧪☀️
Infographic showing how the Solar Orbiter spacecraft traces superfast electrons back to their sources on the Sun. The Sun is depicted on the left, with colored dots representing sources of energetic electrons from solar flares (blue) and coronal mass ejections (red). Curved lines illustrate magnetic field lines along which electrons travel from these events toward the Solar Orbiter spacecraft, shown on the right against a starry background. Text explains that more than 300 bursts of 'Solar Energetic Electrons' were observed between November 2020 and December 2022, allowing scientists to connect electrons detected in space with their origins on the Sun.
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Jan Gieseler @jangieseler.bsky.social · 28/08/2025
Come join us @utu.fi for a Postdoc to investigate solar energetic particles using AI! ☀️ #heliophysics #spaceweather ats.talentadore.com/apply/avaruu...
ats.talentadore.com
Postdoctoral Researcher of Data Analytics in Space Physics
The Department of Computing and the Department of Physics and Astronomy at the University of Turku are looking for a postdoctoral researcher of data analytics in space physics. The selected person wil...
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Jan Gieseler @jangieseler.bsky.social · 06/06/2025
Next week, our SPEARHEAD workshop takes place in Rome & hybrid (free registration required)! This project harness high-energy data from space missions & ground-based detectors, offering new data sets, catalogs, and tools! More information: spearhead-he.eu/2nd-spearhea... #heliophysics #spaceweather
Flyer with solar eruptions in the background and in the foreground the following: SPEcification, Analysis & Re-calibration of High Energy pArticle Data (SPEARHEAD) Workshop #2. June 10-12, 2025. Hybrid participation.
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Jan Gieseler @jangieseler.bsky.social · 02/04/2025
In case someone else from #heliophysics is wondering why CDAWeb, SSCWeb, or OMNIWeb are not working for them today: There is a planned downtime until 10am EDT.
Screenshot of a web search for CDAWeb, giving a website preview with the following text: "April 2, 2025: All SPDF services (CDAWeb, SSCWeb, OMNIWeb, etc.) will be unavailable on Wednesday 4/2/2025 8am - 10am EDT. Please plan your use of the services accordingly."
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Jan Gieseler @jangieseler.bsky.social · 04/02/2025
This is so surreal...
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Jan Gieseler @jangieseler.bsky.social · 04/02/2025
Exactly this. It's as if a lot of people think public transport is only for leisure activities...
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Jan Gieseler @jangieseler.bsky.social · 22/01/2025
👍 I think framadate.org is the perfect replacement for doodle, especially when when2meet is too complicated for some users. 😉
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Jan Gieseler @jangieseler.bsky.social · 22/01/2025
Yes, that's also nice. But I'm not looking for an alternative. Instead I want an *alternative interface* to doodle links that I receive and need to fill out. 🥸
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Jan Gieseler @jangieseler.bsky.social · 22/01/2025
And why is my university actually paying for that service...
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Jan Gieseler @jangieseler.bsky.social · 22/01/2025
I hate filling out doodle.com since it has become so zoomed-in like it wants to be used on a 2'' display... I know that there are alternatives Like when2meet.com, but that doesn't help when replying to requests. Does anyone know if there is some Userscript or alternative interface for doodle.com? 🤔
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Jan Gieseler @jangieseler.bsky.social · 22/01/2025
Given that an initial version of Sharelatex/Overleaf is open source, I'm perplexed that there is not a single competitor around. That's low-hanging fruits! Especially because Overleaf is not really irreplaceable; there is not much data or a follower-base that one wants to keep.
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Jan Gieseler @jangieseler.bsky.social · 22/01/2025
Yes, you're right! I forgot that they squeezed even more, reducing the collaborators to 10 even if you're on a paid plan... I'm a bit ambiguous. On the one hand, they simply offer a good service, so I think it's fine to charge for that. But they're overdoing it, and also in a gatekeeping way.
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Jan Gieseler @jangieseler.bsky.social · 22/01/2025
But I recently took a look at github.com/leouieda/cv and was really impressed what you can do with Tectonic and GitHub nowadays!
github.com
GitHub - leouieda/cv: A LaTeX template for academic CVs
A LaTeX template for academic CVs. Contribute to leouieda/cv development by creating an account on GitHub.
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Jan Gieseler @jangieseler.bsky.social · 22/01/2025
While I do see your point, for me the advantage of really being able to simultaneously edit the same part of a latex file with multiple persons outweighs all downsides (so far)... Not to think of instructing other people how to use GitHub for this. 😅
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Living Reviews | Solar Physics @livingrev-solphys.bsky.social · 09/01/2025
The Indian solar mission #AdityaL1 ☀️ has made their data freely accessible through the ISSDC website. More data will be available following lock in periods. Aditya-L1 Mission: www.issdc.gov.in/adityal1.html ISRO Science Data Archive: pradan1.issdc.gov.in/al1/ (via Dibyendu Nandi @ydnad0 on X)
Aditya-L1 - artist's impression
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Jan Gieseler @jangieseler.bsky.social · 09/01/2025
All versions of Solar-MACH are not working at the moment because #JPL Horizons services are unavailable, possibly due to the #LAFires. Stay safe everyone!
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Jan Gieseler @jangieseler.bsky.social · 11/12/2024
Yep, it's just lovely! And what's best, it runs everywhere I need it: in the terminal, in a Jupyter Notebook, there's even a version for streamlit.
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Jan Gieseler @jangieseler.bsky.social · 29/11/2024
As far as I know, not yet. I think it should become available something like early 2025.
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Jan Gieseler @jangieseler.bsky.social · 21/11/2024
☀️
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Jan Gieseler @jangieseler.bsky.social · 01/12/2023
Medium is the Pinterest of written texts: It clutters my search results, and I learned that it's just not worth to click on the link. On my old computer, I had a script that would completely remove those results from the Google search results - maybe it's time to dig something like that up again...
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Jan Gieseler @jangieseler.bsky.social · 17/11/2023
Repost from "that place": I. C. Jebaraj's new paper on a relativistic electron beam at an interplanetary shock provides understanding to this phenomenon comparing observations by Solar Orbiter to modelling. arxiv.org/abs/2311.05765
arxiv.org
Relativistic electron beams accelerated by an interplanetary shock
Collisionless shock waves have long been considered amongst the most prolific particle accelerators in the universe. Shocks alter the plasma they propagate through and often exhibit complex...
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Reposted by Jan Gieseler
Jennifer Lynn Bartlett @bartlettastro.bsky.social · 10/11/2023
#Astronomers, please tell #NASA #Astrophysics Data Service what you think! 🔭🧪 Something bugging you? Something new you want? Something you like? If so, complete this survey! We value your perspective! (forms.gle/f3cpiBV1k2eP...) #SciXplorer
forms.gle
Science Community Outreach Survey
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Jan Gieseler @jangieseler.bsky.social · 03/11/2023
A little update to solar-mach.github.io You can now use single letters to indicate the different spacecraft. Might be faster to recognize them this way, instead of giving them numbers that need to be looked up in the legend! 🙂
Scientific plot showing a top-view of the inner heliosphere
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Jan Gieseler @jangieseler.bsky.social · 25/10/2023
I was in the process of writing you a reply when I finally recognized your name and that you're in the same building. 🙈😅 But yeah, not being able to have external people is a huge downside.
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Jan Gieseler @jangieseler.bsky.social · 25/10/2023
We're using a Mattermost (open-source) instance that is run by our university. The only downside is that the server is university-only, so we can't have external collaborators on it...
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Jan Gieseler @jangieseler.bsky.social · 23/10/2023
Nice, and it's not even geo-blocked by ORF! 😊
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Reposted by Jan Gieseler
Mathew Owens @mathewjowens.bsky.social · 10/10/2023
There's a slow ebb of space-physics folk moving over to this site. I'm going to try and collection new arrivals into a single thread (as there's no lists?), so that we can find each other.
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Jan Gieseler @jangieseler.bsky.social · 22/09/2023
Honestly, I'm not sure. But as it lacks some of the pro features and my uni is paying for the standard Overleaf cloud version, I assume it's the free community edition.
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Jan Gieseler @jangieseler.bsky.social · 22/09/2023
Not sure. Our self-hosted version allows collaboration, but it lacks track changes and requires a university account. So I think one could set it up in a useful way for collaborative work.
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Jan Gieseler @jangieseler.bsky.social · 22/09/2023
Of course, I would prefer a totally community-driven, completely free project, but as long as institutions prefer to buy software & services instead of hiring people to do the job...
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Jan Gieseler @jangieseler.bsky.social · 22/09/2023
Not sure if this is (at least at the moment) a good example for greediness. Overleaf is (mostly) open-source & you can run your own server of it (lacking some features). And in comparison to "those" publishers, they really provide a service and charge a not-insane price for it.
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