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   AkaSci 🛰️ (akasci@fosstodon.org)'s status on Saturday, 11-May-2024 11:51:02 JST AkaSci 🛰️

   A summary of how space weather affects spacecraft and satellites.

   Single event effects (SEE) cause bit flips in memory, FPGAs, CPUs, ...

   Increased spacecraft drag and orbital decay due to the thermal expansion of the Earth’s upper atmosphere during space weather storms.

   Attitude control disruptions caused, e.g., by large storm-time magnetic field fluctuations can lead to loss of cmd & control.

   And there are lot more satellites in LEO now than in 2003 😨

   https://ccmc.gsfc.nasa.gov/RoR_WWW/SWREDI/2014/SWimpacts_YZheng_060914.pdf
   11/n

   • Embed this notice
     AkaSci 🛰️ (akasci@fosstodon.org)'s status on Saturday, 11-May-2024 11:50:58 JST AkaSci 🛰️

     in reply to

     • Nicolai von Neudeck 🤒🤕

     Here is a website in Ireland with good space weather data and aurora forecasts for Europe.

     @vonneudeck
     https://www.magie.ie/aurora/
     https://www.magie.ie/data/
     16/n

   • Embed this notice
     AkaSci 🛰️ (akasci@fosstodon.org)'s status on Saturday, 11-May-2024 11:50:59 JST AkaSci 🛰️

     in reply to

     It appears that G4 levels have been reached already, a Kp index of 7.66 is being reported by NOAA SWPC.

     Aurora forecast for the next 30 minutes for northern Europe is bright red now.

     Get those cameras ready; there is lot more to come ...

     https://www.swpc.noaa.gov/
     15/n

   • Embed this notice
     AkaSci 🛰️ (akasci@fosstodon.org)'s status on Saturday, 11-May-2024 11:51:00 JST AkaSci 🛰️

     in reply to

     If the Sun is shining where you are, you might be able snap a memorable shot like this of the Sun and the NOAA 3664 sunspot region using the filter that was used to watch the solar eclipse on April 8!

     Let's give it a shot 📷

     14/n

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     AkaSci 🛰️ (akasci@fosstodon.org)'s status on Saturday, 11-May-2024 11:51:01 JST AkaSci 🛰️

     in reply to

     Image captured by NASA’s Solar Dynamics Observatory of the strong X3.9 solar flare, that peaked at 2:54 a.m. ET today.

     "The image shows a subset of extreme UV light that highlights the extremely hot material in flares and which is colorized in gold."

     https://blogs.nasa.gov/solarcycle25/2024/05/10/strong-solar-flare-erupts-from-sun-13/
     Credit: NASA/SDO
     12/n

     Abhiseck Paira :gnu: repeated this.
   • Embed this notice
     AkaSci 🛰️ (akasci@fosstodon.org)'s status on Saturday, 11-May-2024 11:51:01 JST AkaSci 🛰️

     in reply to

     Here are some more mesmerizing pics of the Sun's agitated surface this week, captured by NASA’s Solar Dynamics Observatory.

     The spacecraft is stationed in a Geosynchronous orbit (altitude 35,786 km) at 102° West.

     Note that these magnetic eruptions and curves are huge!
     Sun diameter: 1,391,000 km
     Earth diameter: 12,760 km

     https://svs.gsfc.nasa.gov/14588
     Credit: NASA/SDO
     13/n