Pascal.P

[Tout cela est intéressant @ToutInteressant]

En 1983, à Moscou, Jean-Pierre Petit publie la solution à l'instabilité de Velikhov. Velikhov comprend aussitôt : « Il a trouvé la solution, on va pouvoir développer nos missiles hypersoniques. » La France, elle, n'a rien compris.

Des décennies plus tard, un envoyé de l'armée française vient le voir : en MHD, les ingénieurs militaires français sont « complètement à la ramasse ». Son verdict : c'est irrattrapable.

Le modèle Janus et ses masses négatives, ses démêlés avec Thibault Damour, l'Ukraine, le dollar : à 86 ans, l'ancien directeur de recherche au CNRS se livre sans masque sur quarante ans de science à contre-courant. 👉 https://t.co/cI2dEGQBmC

[ICEYE @iceye_global]

On a night in October, a truck-mounted jammer sits at a site in Kaliningrad, its antenna boom raised toward the Baltic.

ICEYE’s SAR satellites saw it anyway: radar needs no daylight.

Kaliningrad has become one of Europe’s most active sources of electronic interference. Jamming from the exclave degrades GPS and communications across the Baltic Sea.

A single image shows a jammer in place. Persistent monitoring shows when it is ready to transmit: a raised antenna is a strong indicator of activity, and tracking that over time reveals when systems go operational and how that lines up with reported interference.

To find out more, download the Baltic Sea Overwatch report: https://t.co/D8Dkc273Cq

[Ze Clint @ZeClint]

Quand un streameur a fait math sup math spe école d’ingé bah ça se voit et ça donne tout de suite une analyse qui vaut son pesant de cacahuètes !

Tout y est ! C’est simple de relever la France quand on a compris ce qui cloche ! Alors faisons le !

[tt_125 @tt12514]

Drone detector

[EnduroSat @EnduroSat]

Power is the ceiling on next-gen space applications. In-orbit 3D printing breaks it.

Proud to partner with @_OrbitalMatter - first rigid beam 3D printed in the vacuum of space, on an EnduroSat platform.

Next: 5 kW array in 2028, toward 100 kW+

#spaceiscloserthanyouthink

[Outer Space Today @outerspacetoday]

JUST IN: The U.S. Space Force is considering a new military role for satellites operating unusually close to Earth, including the ability to rapidly replace spacecraft following nuclear attacks or major orbital debris events.

Space Force Deputy Chief Science Officer Gillian Bussey warned that China gaining this capability before the U.S. could create an unacceptable strategic imbalance.

The military is also evaluating VLEO satellites for higher-resolution surveillance, faster communications and potential Golden Dome applications.

[Payload 🚀 @payloadspace]

OPINION: Russia has what it needs to build a jammer, or a spoofer, that can degrade or falsify ICEYE’s SAR imagery of Ukraine, significantly weakening the country’s (and allies’) capability to perform intelligence, surveillance, target acquisition, and reconnaissance.

Russia will most likely use the data collected during this close proximity mission to build and field such a capability within the next 12 months.

Shield Space CTO Dan Molland authored Payload's latest opinion piece, arguing that Russia's maneuver against an ICEYE satellite last month was likely part of an effort to deny ICEYE's overhead advantage in the Ukraine war. Read the full Op-ed on Payload, link below.

[Modern War Institute Editor @MWI_editor]

MWI Book Club: Project Maven https://t.co/l3dRhb0QmZ

[COMSPOC_OPS @COMSPOC_OPS]

Early today, COSMOS 2613's orbital plane came as close to ICEYE-X37's as it will get, 0.05° apart. At that point our predictive rendezvous job put the cost of matching X37's orbit at about 6.9 m/s. Since no maneuver followed, the planes are now slowly drifting apart.

On the other hand, COSMOS 2611 is still closing on X37, with their planes 0.03° apart today. With the current propagation, we estimate their planes come closest around 13 Nov, about 0.02° apart, and matching the plane would take about 2.6 m/s at that point.

[Modern War Institute Editor @MWI_editor]

War for the Mind: Narrative Intelligence, AI, and the Fight in the Cognitive Domain https://t.co/FM7UnFIfGO

[Atoms Not Bits @AtomsNotBits]

BREAKING: A startup emerges from stealth with electronic warfare buoys designed to jam hostile naval drones and sensor-cloaking technology to hide critical undersea cables and pipelines.

The company, @CaladhTech, is backed by YC and founded by a former DARPA maritime technology expert.

[COMSPOC_OPS @COMSPOC_OPS]

Could there be another ICEYE RPO?

On 17 Oct COSMOS 2612 passed 59 m from ICEYE-X36. Two of its launch mates, COSMOS 2611 and COSMOS 2613, now sit in a similar setup with ICEYE-X37, which launched with X36 on 4 Mar 2024.

On distance alone there is little to see. COSMOS 2611 is about 11,800 km from ICEYE-X37 and COSMOS 2613 about 13,500 km, both well around the orbit from it. The orbits are where it gets interesting.

Our predictive rendezvous job has tracked 2611 against X37. Their planes are now 0.035° apart and still closing, reaching 0.021° on 10 Nov. Matching orbits takes 0.5 m/s to adjust altitude and 2.6 m/s to tilt the plane.

The same job flagged COSMOS 2613 against X37 on 2 Nov. Their planes come closest early on 5 Nov UTC, 0.051° apart. Matching orbits takes 1.7 m/s to adjust altitude and 6.7 m/s to tilt the plane.

Those costs assume the planes are lined up, so they apply around 5 Nov for 2613 and from 10 Nov on for 2611. In perspective, COSMOS 2612 spent a little over 30 m/s on its recent approach to X36, between 12 and 20 Oct.

#Space

[Jānis Bērziņš @JanisBerzins]

New book, open access: Countering Hybrid Warfare in Ukraine and NATO (Routledge).

Ukrainian practitioners on adapting to Russian hybrid pressure since 2014, plus case studies across Europe. Edited with Neil Chuka and Viacheslav Semenenko.

Download: https://t.co/00JinlgARi

[The Defence Blog @Defence_blog]

NATO tested turning regular 5G cell towers into sensors that can spot drones and other objects moving through a city. The trial ran for two weeks in Latvia.

https://t.co/jAAX84GPre

[SpaceNews @SpaceNews_Inc]

Google runs AI model on satellite chip, advancing orbital data center ambitions https://t.co/TFkQ0O5ZIZ

[Payload 🚀 @payloadspace]

.@Argotec_Space, an Italian smallsat manufacturer, has raised €50M ($55.8M) to ramp up how many satellites it can build each year.

Since its founding in 2008, Argotec has already built up some flight heritage, including two microsatellites that flew with the NASA DART and Artemis I missions. The company focuses on building small sats up to 350kg.

Payload editor @jacqfeldscher shares what the company plans to do with the new capital. Link in the comments.

[QuantumAnalysis @Qtumanalysis]

A US SPY AGENCY IS QUIETLY BUILDING A MAP IN ORBIT FOR WHEN GPS GOES DARK

QUANTUM IS HOW.

In March, a SpaceX rocket carried a small satellite for the National Geospatial-Intelligence Agency, the US intelligence agency that maps the planet for the military. On board was a diamond quantum magnetometer, built by SBQuantum and Spire.

Its job is to measure Earth’s magnetic field from space.

That sounds boring until you know what depends on it. NGA maintains the World Magnetic Model, which militaries, aircraft, and the compass in your phone use to work out which way is north.

Today that model leans on a European satellite mission that gives periodic snapshots. NGA called this “the first-ever effort to collect reliable geomagnetic data using CubeSat technology,” and the quantum sensor measures continuously.

The Pentagon is building navigation that works without GPS by reading Earth’s magnetic field, and it has already flown planes that way. That only works if the magnetic map is accurate.

So a spy agency is using quantum sensors to build the map the military will navigate by when GPS goes dark.

$INFQ $IONQ $QBTS $RGTI

[Кукуруза как у томакруза 🌽 @KYKYPY3A_B]

Сегодня обновились данные NORAD и подтвердилась необычная ситуация с 1 из 3 уже похороненных спутников Рассвет — он ожил и начал резкий подъём с 221км до 295км всего за 9 дней. Ещё полторы недели назад он должен был войти в атмосферу примерно завтра.

Это очень необычная ситуация, тк проблемные аппараты либо не выживают сами, либо их сводят даже после восстановления контроля из-за рисков. Подробностей пока нет, но пока можно сказать, что из 32 выведенных аппаратов сойдут 2, а не 3.

[John Hardie @JohnH105]

“Defence startup Destinus has built more than 1,750 Ruta cruise missiles in Europe and now produces ‌more cruise missiles in a month than Europe did in a year before Russia's full-scale invasion of Ukraine, it told Reuters.

The Dutch-headquartered company said monthly output of its Ruta missile had reached nearly 300 units.

Chief Executive Mikhail Kokorich said he expects Destinus from next year to be able to meet demand across Europe, including Ukraine, for turbojet engines in the roughly 1.5-kilonewton thrust class used in cruise missiles.

He ⁠said the company was already producing such engines in series and supplying them both for its own missiles and to other manufacturers…

The company told Reuters it had begun production of the larger Ruta Block 2 missile, ‌which ⁠is designed to carry a 250-kg payload and travel more than 700 km.

Unlike the current Block 1 version, the missile is designed to be stored, transported and launched from the same container, simplifying logistics for larger stockpiles…

Kokorich also contrasted Destinus' China-free supply chain with wartime production in Ukraine, saying access to Chinese suppliers would make manufacturing ‘cheaper, faster, easier’ but that Destinus used no Chinese components.”

https://t.co/2lCQsSKtVm

[afec7032 🇷🇺 @afec7032]

Rassvet №23 satellite, which was already marked as "decayed" on some resources like Celestrak, was finally found after more than a week without tracking data

After descending to ~221 km, the satellite suddenly started climbing up, and is now at ~295 km.