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Showing content with the highest reputation since 04/19/2019 in all areas

  1. 2 points
    Rubén Looking at the GOES 15 plot today, it appears some type of 'fix' adjustment has been applied to it, just in the last day, for now it is tracking the GOES 14 sensor quite well.
  2. 1 point
    Het is erg lastig te zeggen welke erupties wanneer aangekomen zijn en welke ons gemist hebben. Alles lijkt in een grote soep veranderd te zijn bij wijze van spreken. Heb wat foto's gezien uit Noord Amerika en een hele mooie uit Nieuw Zeeland zoals in het nieuws gebruikt is. https://www.spaceweatherlive.com/en/news/view/387/20190514-strong-g3-geomagnetic-storm Het klopt dat CMEs afremmen onderweg naar de Aarde en hoe snel zulke plasma wolken afremmen is de kunst om dat te voorspellen en nog steeds erg lastig. Er word wel degelijk rekening mee gehouden in ieder geval maar om het accuraat te voorspellen is zeer lastig zeker bij zulke langzame CMEs. In ieder geval ik denk dat de CME die voor de G3 storm zorgde de CME was die afgelopen zaterdag gelanceerd was.
  3. 1 point
    I always thought it stood for Kiloparsec, but in solar weather, that makes no sense.
  4. 1 point
    14/5/2019 ..Aurora mostly behind the rain clouds but did manage to get a rainbow in shot as well
  5. 1 point
    Maximum flux of the day also added to the summary table
  6. 1 point
    Secondary GOES satellite data is now being archived daily so you'll be able to see the secondary X-ray flux there too. Max flux of the day is also added to the graph. As an extra desert we've added 4 years of secondary x-ray data to the archive... think that should be enough
  7. 1 point
  8. 1 point
  9. 1 point
    Hi Marcel, I've been following the SpaceWeatherlive website and getting its alerts for a few months now. The way we Ham Radio enthusiasts interpret the information supplied by the site is different from, for example, Aurora photographers. In general, when there's aurora around, it's bad for us as that aurora is actually the Plasma from the sun hitting the Ionosphere around the Earth which we use to bounce our short wave signals long distances off and the impact of the plasma raises the background noise level on radios, making it harder to hear long distance, weak signals. The charged Ions that come ahead of the plasma from Coronal Holes, CMEs etc. however is good news for us as the more the Ionosphere is electrically charged, the better the signals reflect. Such Ionisation normally occurs through sun spots (explosions on the sun) but as we are currently at the bottom of the 11 year long sunspot cycle, these are quite rare, so any effects such as pre-auroral enhancement are very welcome to the Amateur Radio Community, when trying to make long distance contacts on the short wave bands and spaceweatherlive provides alerts when such conditions might be occuring and hence is a valuable resource for Amateur radio. Regards Ed.
  10. 1 point
    Hi, yes, I've seen it. Thank you very much for advising and for all the answers. A hug.
  11. 1 point
    Marcel - I am basically mirroring this (with a few edits) from your Facebook page as an addendum to your request for knowledge. I do amateur radio and in the past, I used to partake very seriously indeed in High Frequency (hf) contesting picking up a couple of world records and several World #1 spots. These contests were 48 hours in duration (CQ World Wide morse and voice) and the aim was to work not only as many stations as possible but also as many different countries on each of 5 hf bands (1.8MHz to 28MHz). The 28Mhz band I needed this information the most. To achieve these results I needed bang up to minute propagation results and these results were in a separate window on another screen so I could monitor and adapt to change. I required a livestream for: SFI, SF density, sunspot counts, geomagnetic storm forecasts, SIDs etc. So I had a good idea of how stable/unstable the ionosphere was at a given time. Despite a few of these contests coinciding with the peak of the sunspot cycle and the ionosphere fairly stable, the data was still vitally important to work out when the high bands were open and and when to change frequencies. Especially 28Mhz and 21MHz which are heavily influenced by solar flux levels and I needed to maximise continental band openings. My main source of real time information came from Solarham although I also have a good grounding in propagation and have done propagation modelling in the past. From a radio communications aspect and working out band openings on hf, there is also the "grey line" to consider. The grey line are the times where day goes to night and vice versa. Affecting different ionospheric layers (mostly the D layer) but you can get band openings to specific parts of the world stronger than any other time. For example, when I wanted to work west coast USA on hf, the "window" of opportunity was only about 20 minutes and signals became pretty strong during this time and then died down to zero audibility. Knowing this information meant I could not only point a directional antenna towards the area I wanted to chat to but also work out the maximum usable frequency (MUF) I needed to use for that moment in time. Then of course following this grey line as it progresses across the earth as the day goes into darkness and alternatively comes out of darkness presenting a path for two distinct areas on the earth. When conditions are right, it is akin to pointing a narrow torchbeam onto a globe and slowly rotating it. I remember consecutive contacts (ie the loudest) going from New Zealand, Australia, Indonesia, China, Malaysia, India .... and I knew Saudi would be peaking next and it was. Hf propagation can be very interesting Yes, I did keep an eye on these details continuously and they were windowed on a second monitor so I could see if an ionospheric storm was building up and for any signs of Dellinger fading or Sudden Ionspheric Disturbance (SID) - I monitored SIDs using a VLF antenna through a computer sound card. SIDs are also useful for detecting aurora activity as it arrives due to the dampening effect on the ionosphere. This in turn can have an enhanced effect on VLF and VHF signals due to the saturation of the D and E layers you can actually hear stations from a lot further than expected. On VHF it is normally "line of site" communications but you can hear stations more than 150 miles away (another aurora indicator). Using either morse code/voice this gives rise to something known as auroral scintillation where you can actually hear a "dualling" on the signal. This sounds very different from the 1/7th second echo due to the hf signal being received via both short path and long path at the same time. Sorry, typing for England but hopefully there may be some nuggets that tie in with your train of thought Hope this helps Marcel. Steve
  12. 1 point
    Thank you for your answers and for helping me learn more about our king star. a hug.
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