Return to KLUBNL.PL main page
| To: | <[email protected]> |
|---|---|
| Subject: | LF: Re: strange propagation effects on VLF |
| From: | "Alan Melia" <[email protected]> |
| Date: | Wed, 3 Nov 2010 20:54:34 -0000 |
| Dkim-signature: | v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=s1024; t=1288817680; bh=NW+pVXEc/EzI98/SLCPqzNXn4RNwT1Uv5n+JbrMhWDI=; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-Antivirus:X-Antivirus-Status; b=VXFgmasPEWDGXyaRLlwUiGdDMkA0tFOncDeKg7Qc+pD9ptDsFF7iE/fAUS8zNvFmAwv+FSFdn1xHJfyzW1hdabHT6zZhxJ+O/tUIdgyxCLPetWilvLeHGZMzeYDlBrVXmYS6vESAF33jDToipDiC8rqFVwogW0fef7uWPK/fUEE= |
| Domainkey-signature: | a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=DKIM-Signature:Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-Antivirus:X-Antivirus-Status; b=x3F6kU4v5KLk0F3K1R+9ndKMogFCDJfy7qHOAyMkDY+BSio6z7m+iSOg84ktA3sHj4TmEOOib38/FRMl/n3nJafFvf7icUhMIOj7VzetFLwc0Yta8ZzElARzmedzI9xZXwNRptDk6ZLe9gMibpCvaJQBbuSuZsu67w9qU/Ckr/U= ; |
| Domainkey-status: | good (testing) |
| References: | <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Hi Stefan you have just sen the effect of a solar flare (fairly mild one) giving daytime enhancement. The radiation strongly ionises the region of the D-layer below the "reflection height" that normally absorbs the waves. hence incresed level but only for the period the flre intensite is above a certain threshold. Today's was a particulalry long one (maybe an overlapping double) attachment courtesy of NOAA. Alan G3NYK ----- Original Message ----- From: "Stefan Schäfer" <[email protected]> To: <[email protected]> Sent: Wednesday, November 03, 2010 7:51 PM Subject: VLF: strange propagation effects on VLF > VLF, > > There are strange propagation effects going on on VLF in the last days. > I just observed that there was a significant _sudden_ rise/enhancement > of all the signal levels arround 12:15 UTC. This effect is observed on 3 > spectrograms, DF6NM's 4X1RF's(some minutes later) and DK7FC's grabber so > it cannot be an accident. See the pictures. > How can this be possible? It seems the autumn and winther period > provides some interesting effects there which are not completely > understood, at least by me ;-) > > 73, Stefan/DK7FC > >
|
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | LF: 501150, Lubos OK2BVG |
|---|---|
| Next by Date: | Re: LF: 501150, pa3abk |
| Previous by Thread: | VLF: Re: strange propagation effects on VLF, rn3agc |
| Next by Thread: | LF: 501150, Lubos OK2BVG |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
