(meteorobs) 55.25 mhz radio echoes

[Ed Totman]

The images are in the photos section of the meteorobs
yahoo group, in the folder "radio echoes": 

http://groups.yahoo.com/group/meteorobs/

I will also send them directly to you for comment. 
Thanks Andy.

--- Andy Smith <andy at television.f9.co.uk> wrote:

> Hi Ed,
> 
> Yes, this is the place to discuss them. There are
> many radio observers
> lurking amongst the visual observers here!
> 
> Unfortunately the image links you provided only came
> up with an error page
> here:
> 
> Error
> 
> GROUP_CHECK
> gpg7.bc.scd.yahoo.com:GROUP_CHECK
> 
> Generally, the presence of a meteor echo signal
> above or below the "nominal"
> carrier frequency is usually a factor of the upper
> air windspeed/direction.
> A meteor entering the atmosphere leaves a trail of
> plasma that reflects the
> signal, and this is blown along by the wind until it
> disipates and can no
> longer sustain a reflection. If the frequency
> offsets from the "nominal" are
> constant, it could well be signals from separate
> transmitters. Until I can
> see your images I can't comment further. Feel free
> to email them to me using
> the links on my website.
> 
> Many reflection examples can be seen on my website
> at
> http://www.tvcomm.co.uk/radio. My live pages are
> currently offline whilst I
> rebuild the shack! Other observers are also listed
> at the bottom of the
> index page.
> 
> Regards,
> Andy Smith G7IZU.
> 
> 
> 
> -----Original Message-----
> From: meteorobs-bounces at meteorobs.org
> [mailto:meteorobs-bounces at meteorobs.org]On Behalf Of
> Ed Totman
> Sent: 16 October 2005 17:28
> To: meteorobs at meteorobs.org
> Subject: (meteorobs) 55.25 mhz radio echoes
> 
> 
> I captured the following images centered on the
> channel 2 tv video carrier at 55.25 mhz.  I see what
> I
> believe to be meteor echoes above and below the
> carrier, along with varying atmospheric noise.  I
> think this image shows
> 
> a) echoes from a single tv transmitter with meteors
> trails at different positions in the sky or
> b) echoes from different tv transmitters at a
> variety
> of distances from my antenna
> 
> What do you think?
> 
>
http://photos.groups.yahoo.com/group/meteorobs/vwp?.dir=/radio+echoes&.src=g
> r&.dnm=Channel+2+meteor+echoes.GIF
>
http://photos.groups.yahoo.com/group/meteorobs/vwp?.dir=/radio+echoes&.src=g
> r&.dnm=Channel+2+meteor+echoes2.GIF
> 
> Is this the correct group to discuss meteor radio
> echoes?  I don't want to waste bandwidth if no one
> is
> interested.
> 
> equipment:
> homebrew 55mhz antenna
> broadband +16db amp
> AOR AR5000
> SDR-14
> 
> 
> 
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