Three-Dimensional Velocity Analysis and Particle Size Dynamics from Multi-Site RGB-Photometry of Noctilucent Clouds
Oleg S. Ugolnikov, Olga Yu. Golubeva, Egor O. Ugolnikov
https://arxiv.org/abs/2605.21687 https://arxiv.org/pdf/2605.21687 https://arxiv.org/html/2605.21687
arXiv:2605.21687v1 Announce Type: new
Abstract: A method for measuring the altitude and particle size of noctilucent clouds, based on positioning and photometry from wide-angle three-color cameras, has been developed to determine the three velocity components, particle radius, and its derivative with respect to time for different cloud fragments. The updated method is applied to observational data of bright clouds during the summers of 2023-2025. Meridional motion of the cloud is found to be the principal factor driving the change in particle size. The effect of particle size evolution in the presence of a strong latitudinal temperature gradient is also studied.
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Mandalorian and Grogu on a Friday night.. This is one of the advantages of living in a small town 😂
With Trump’s backing
scandal-plagued Ken Paxton
has won over John Cornyn
in the Texas GOP primary for senator
– but he might lose in November against James Talarico,
a Democrat with a groundswell of popularity
Paxton comes with significant political baggage,
National Republicans worry they will have to spend significantly more with him as the nominee.
Paxton was impeached in 2023 after being accused of corruption,
and reported to the FBI…
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I wonder which version of the inerrant word of God they chose. The top 10 options (from Wikipedia):
"The Evangelical Christian Publishers Association release monthly and annual statistics regarding the popularity of different Bibles sold by their members in the United States. In 2023, the top 10 best-selling translations were the following:[19]
New International Version
King James Version
English Standard Version
New Living Translation
Christian Stan…
I wonder which version of the inerrant word of God they chose. The top 10 options (from Wikipedia):
"The Evangelical Christian Publishers Association release monthly and annual statistics regarding the popularity of different Bibles sold by their members in the United States. In 2023, the top 10 best-selling translations were the following:[19]
New International Version
King James Version
English Standard Version
New Living Translation
Christian Stan…
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