Tootfinder

Daylight #fireball over the U.S. Southeast - and there may have been a related meteorite hit of a house: https://www.youtube.com/watch?v=H_OaYXxB7Z8. Visual reports: https://fireballs.imo.net/members/imo_view/event/2025/3455. Detections by radar and from a satellite: https://x.com/spann/status/1938367055368970461. An article: https://eos.org/research-and-developments/fireball-passes-over-southeastern-united-states. More TV reports: https://www.youtube.com/watch?v=bq7THmDUCfg and https://www.youtube.com/watch?v=IcTk-Sg1uSA and https://www.youtube.com/watch?v=5d8HbC4zjKw

I'm still weirdly surprised and delighted when I see myself referred to by my name, even though it happens fairly often now. Can't wait for when it's spoken rather than written online.

Comcast IPv6 decided to bork itself again. Nothing I've tried (restarting DHCPv6 client, power cycling the modem) works.
My router gets a v6 address, can hit the internet without issues.
Router makes a DHCPv6 request, gets a delegated /59 out of my static /56.
But when I try to use an address out of the /59 on the local network (via radvd handing out /64's) it gets nowhere, traceroutes stop at the CPE/CMTS.

For those who never had a Mac who are put off by / bemused by / disdainful of all the praise for Bill Atkinson’s work:
Don’t think of this as admiration for Apple and Apple history. Think of it as admiration for a more humane view of computing:
one where software’s job is to bring delight and foster creativity,
one where our devices are not hermetically sealed gifts from the tech gods with which we make a Faustian bargain, but rather a bucket of art supplies for us to play with, reshape, make our own. https://mastodon.social/@arroz/114643547519909731

This https://arxiv.org/abs/2504.01832 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Quantum Meets SAR: A Novel Range-Doppler Algorithm for Next-Gen Earth Observation
Synthetic Aperture Radar (SAR) plays a vital role in remote sensing due to its ability to capture high-resolution images regardless of weather conditions or daylight. However, to transform the raw SAR signals into interpretable imagery, advanced data processing techniques are essential. A widely used technique for this purpose is the Range Doppler Algorithm (RDA), which takes advantage of Fast Fourier Transform (FFT) to convert signals into the frequency domain for further processing. However, …

Performance of MAGIC stellar intensity interferometer and expansion to MAGIC CTAO-LST1 stellar intensity interferometer
Alejo Cifuentes, V. A. Acciari, F. Barnes, G. Chon, E. Colombo, J. Cortina, C. Delgado, C. D\'iaz, M. Fiori, D. Fink, T. Hassan, I. Jim\'enez Mart\'inez, I. Jorge, D. Kerszberg, E. Lyard, G. Mart\'inez, R. Mirzoyan, M. Polo, N. Produit, J. J. Rodr\'iguez-V\'azquez, P. Saha, T. Schweizer, D. Strom, R. Walter, C. W. Wunderlich, MAGIC Collaborat…

Performance of MAGIC stellar intensity interferometer and expansion to MAGIC + CTAO-LST1 stellar intensity interferometer
A new generation of optical intensity interferometers are emerging in recent years taking advantage of the existing infrastructure of Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC SII (Stellar Intensity Interferometer) in La Palma, Spain, has been operating since its first successful measurements in 2019 and its current design allows it to operate regularly. The current setup is ready to follow up on bright optical transients, as changing from regular gamma-ray observations to SII…

Fresnel reflection coefficients in the Fourier domain for a planar surface in uniform motion parallel to its interface
St\'ephane Azar, Sebastian Golat, Francisco J. Rodr\'iguez-Fortu\~no
https://arxiv.org/abs/2506.04417

Fresnel reflection coefficients in the Fourier domain for a planar surface in uniform motion parallel to its interface
The optical reflection coefficient of a dielectric medium moving uniformly in the plane spanned by its surface is rigorously calculated using classical electrodynamics and special relativity, and expressed in the Fourier domain, as a function of the incident frequency and wavevector, valid in both the far- and near-field regimes. It is found that cross-polarisation appears as a consequence of the motion, except when it is directed along the plane of incidence. As an example, using a Drude model…