Re: RAZoom Fri. April 5th 19:30 BST Solar Eclipse Effects on VLF Radio Propagation
Mark - Nice plots! The eclipse effects are very pronounced and what I was expecting to see last October but didn't. I'm setup with four virtual receivers (SDRduo) on the LF Comm frequencies and one
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WReeve
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#1555
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Re: RAZoom Fri. April 5th 19:30 BST Solar Eclipse Effects on VLF Radio Propagation
Hello, ??? ??? If anyone does record effects from the eclipse, then do please send them in for inclusion in our monthly summary, Radio Sky News. Thanks, John.
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John Cook
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#1554
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Re: RAZoom Fri. April 5th 19:30 BST Solar Eclipse Effects on VLF Radio Propagation
Mike, Honestly I don't know. We could see soon, in April 8th? Judging from Kiruna magnetometer historical data there was magnetic field disturbance on that day:
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Zilvinas, LY2SS
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#1553
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Re: RAZoom Fri. April 5th 19:30 BST Solar Eclipse Effects on VLF Radio Propagation
I've attached a slide from the talk I gave some time back about SIDs and TIDs that shows my observations of the 20th March 2015 eclipse. The eclipse was over 80% on the two paths in the slide and
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Mark Edwards
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#1552
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Re: RAZoom Fri. April 5th 19:30 BST Solar Eclipse Effects on VLF Radio Propagation
Hi ?ilvis, That is an interesting group of measurements. ?I understand there will reduction in electrons during an eclipse. ?So, are the electron currents at satellite altitudes affecting the
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Mike German
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#1551
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Re: RAZoom Fri. April 5th 19:30 BST Solar Eclipse Effects on VLF Radio Propagation
Thanks for the interesting lecture! My 2cents: there was a total eclipse in July 2009 and then I thought what is happening with Earth magnetic field during the event. So I made an screenshot from NOAA
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Zilvinas, LY2SS
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#1550
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Re: RAZoom Fri. April 5th 19:30 BST Solar Eclipse Effects on VLF Radio Propagation
The link has been mailed out.? Let me know if you have not received it....... -- ???? Paul Hearn? ??? paul@... ??? ?RA Section Director? ???
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Paul Hearn
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#1549
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Re: Python Data procession and Visualisation - a set of tutorials.
Sorry, just saw the 19:00 BST tutorial starts. OK for my time zone. Thanks
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A. C.
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#1548
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Re: Python Data procession and Visualisation - a set of tutorials.
Interested depending on the Mon. time of the tutorials. Thanks
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A. C.
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#1547
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Re: Python Data procession and Visualisation - a set of tutorials.
--------------------------------------------------------------------- Data processing and visualisation of muon data using the Raspberry Pi
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Paul Hearn
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#1546
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Meteor echo of the day
Today's screenshots are from Martin near Salisbury. The left hand screenshot is from Martin's own receiver system while the others are from the live stream. They show a tail echo lasting ten seconds
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Brian
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#1545
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RAZoom Fri. April 5th 19:30 BST Solar Eclipse Effects on VLF Radio Propagation
We are pleased to welcome back Whit Reeve, a long time supporter of these seminars. 'October 14, 2023 Solar Eclipse ~ Effects on VLF Radio Propagation ~ Observed in Alaska USA' ~ Whitham D. Reeve.
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Paul Hearn
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#1544
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LRO Latest map of Milky Way at 1420.405MHz (hydrogen)
Latest map of Milky Way in hydrogen line with Ptarmigan Triffid Military Dipole Array: https://astronomy.me.uk/latest-milky-way-map-from-lro-1-4-2024 Andy
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Andrew Thornett
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#1543
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Re: Meteor echos of the day
There was another set of weird echos earlier.
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Tony Abbey
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#1542
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Meteor echos of the day
Here are several interesting echoes. Starting with the echo bottom left. This was seen by NW Hampshire with horizontal polarisation and by Armagh but not by NW Hampshire with vertical polarisation or
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Brian
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#1540
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Meteor echo of the day
Although fairly quiet an average of two or more echoes per minute have been seen most mornings lately. In today's screenshot the NW Hampshire H Pol receiver sees two echoes only one of which is seen
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Brian
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#1539
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Meteor echo of the day
Here are two meteor echoes seen by NW Hampshire along with the full bandwidth horizontal lines which are lightning strikes from a local Thunderstorm unseen by the other receivers. Note that the
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Brian
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#1538
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Meteor echoes of the day
An early start enabled me to capture some interesting echoes this morning while working on other things. You can capture your own observations at https://ukmeteorbeacon.org/beaconclient/ This
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Brian
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#1537
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Meteor echo of the day.
Today's screenshot shows what are most likely the same echo viewed from three different locations. The vertical scales are not precisely aligned due to processing delays, a problem which can be
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Brian
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#1536
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Re: Echoes of the day
There is also a difference in the electric field strength between a circular polarisation (CP) and linear incident radiation of a factor of two.? For the same transmitted power a meteoroid trail
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Mike German
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#1535
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