Date: Mon, 02 Oct 2006 08:56:56 -0600
From: Thomas Ashcraft <ashcraft
References: <451FCB5A.1010004
	<Pine.LNX.4.60.0610011805580.3736
	<01e701c6e5d2$47589b80$6701a8c0


Thank you all for your information and computation references!

Rodney, I am not monitoring at VLF frequencies but rather I receive SIDs 
as a byproduct of my decametric and VHF observation frequencies. During 
daylight, 18 and 20 MHz seem to show SIDs quite well and when I see my 
chart line dropping I can usually trust that as a flare in progress.  
GOES satellites are great instruments for sure but our simple radio 
circuits at earth's surface do pretty good as well I have noted over the 
years.

Thanks again.

Thomas Ashcraft in New Mexico




Rodney Howe wrote:
> Thomas,
>
> Which station are you tuned too?  Jim Creek at 24.8kHz, La Moure at 
> 25.2kHz? Jim Creek may be shut down. La Moure is working fine. 
> Orientation from you to the receiver may have much to do with how 
> strong the SID appears.
>
> http://www.vlf.it/trond2/list.html
>
> What kind of receiver did you build?  Any on this list?
>
>
>
> produced a superflare, much of which arrived at the earth as long hard 
> ionosphere had a prompt response, December 27, 2004, 21:30:26 UT.  It 
> took almost 45 minutes for the event to complete:
>
> http://var.astro.cz/oejv/issues/oejv0022.pdf
>
> rodney
>
> <godetj
> To: "Thomas Ashcraft" <ashcraft
> Sent: Sunday, October 01, 2006 12:03 PM
>
>
>>   Hello Thomas and the list !
>>
>> easier to reply : X ray are photons, electromagnetic radiation, as 
>> light (about 300,000 km/s in vacuum).
>>
>>   Now, the delay between the time when a GOES satellite receives a 
>> burst of X photons and the moment when we see the effect of this 
>> burst on the D layer of the ionosphere by a modification of the VLF 
>> propagation varies. It depends of many factors, as the intensity of 
>> the time of the day, the date of the year the location and the solar 
>> cycle (therefore the previous state of ionisation), and so on... The 
>> burst as seen by GOES satellites (the time necessary for the physical 
>> modifications of the atomes of the D layer) and often will last more 
>> time (the time necessary, for these atomes to return to the previous 
>> state).
>>
>> (Centre de Physique du Globe, IRM, Belgium), the delay is often from 
>> 1 to 5 minutes, sometime less, sometime more, the effect may last one 
>> hour more than the burst...
>>
>>   Best regards, and sorry for my poor English !
>>
>>
>>
>>
>> On Sun, 1 Oct 2006, Thomas Ashcraft wrote:
>>
>>>
>>> Question:
>>>
>>>
>>> Does anyone know the time differential between when GOES satellites 
>>> ionosphere? I wonder what the general parameters are in seconds or 
>>> if there is a range of time (depending upon what variables?) Do 
>>> solar ejection?
>>>
>>>
>>> How much sooner will GOES detect the output before it is detected by 
>>> a supersensitive earthbound SID receiver?
>>>
>>> Thanks for any info.
>>>
>>> Thomas Ashcraft
>>>
>>> _______________________________________________