[Prev][Next][Index][Thread]

Re: (meteorobs) Radio Observation of Meteors



Ron, John and Meteorobs

The Amateur HF 10 meter band (28.0-29.7 MHz) works splendidly for meteor
burst work. The "pings" or Ionized trails sustain reflective signal paths
longer the lower the frequency.  A two second burst at 144 MHz might last 8
seconds at 28 Mhz. Of course path geometry is a big factor, but 10 meters
works very well for meteor burst work.

I'm still transcribing my recordings of the Perseid "pings" using 55.250 MHz
(visual carrier freq of TV Channel 2). AM carrier very easy to copy on any
communications receiver capable of receiving CW. Bursts are heard as "blips"
that even show doppler shift.

Regards,

Mark
N4OKX
EM-78
Louisville, KY

-----Original Message-----
From: Ron Thompson <rlthompson@thezonedot net>
To: meteorobs@jovian.com <meteorobs@jovian.com>
Date: Friday, August 20, 1999 9:19 PM
Subject: Re: (meteorobs) Radio Observation of Meteors


>John Elder wrote:
> From my experience, I would add that there are others on this list that
>are much more experienced at this than I am, meteor scatter does not
>work well on the HF bands.  For the most part it is a VHF phenomenon, up
>into the UHF range.  As I understand it, the meteor scatter automated
>counting networks are using 24 hr broadcasts from 'low VHF' TV stations,
>and FM broadcast stations for the most part.  Along with a computer and
>software to count the relections.  I believe, and stand to be corrected,
>that the ionization trail of the meteor reflects the shorter wavelength
>VHF signals much better than HF.
>
> The high powered broadcast stations work well as beacons and they are
>fairly widespread across the continent(s).
>
> A websearch should turn up the websites for the Society for Amateur
>Radio Astronomers, and others, who have members who do automated meteor
>counts via radio.
>
> I hope this helps.
>
> Reference material for meteor scatter available at almost any library -
>The ARRL Radio Amateur's Handbook, also published by the ARRL, Beyond
>Line of Sight a History of VHF Propagation from the Pages of QST, just
>for a start.
>
> I hope this helps,
>
> Ron (in Gander) VO1AV, formerly FP5EK
>
>>
>> The Lake Kickapoo, TX radar seems to work well as a beacon for meteor
echos.
>> Does anybody know where one can get a list of other powerful CW radars?
>>
>> Also, WWV broadcasts at 2.5, 5, 10, 15, and 20 MHz running about 10 kW.
>> Except at solar max (about now), the 20 MHz broadcast should not reflect
>> from the F region during the night, yet it is high enough in frequency to
be
>> nearly ideal for meteor scatter. Has anybody tried listening for this?
They
>> used to broadcast at  25 MHz, too--which would have been even better!
>
>
>>
>> Regards,
>>
>> John
>
>--
>R & L Thompson, 9 Medcalf St., Gander, NF, Canada A1V 1R9
>Tel (709) 256-1179, Fax (709) 256-8638, e-mail rlthompson@thezonedot net
>
>Amateur Radio Station call VO1AV, FP5EK, VE1KM   Grid Square GN28qw
>Location 48 57'08" N  054 36'43" W,
>Local time UTC - 2.5 hrs Summer, UTC - 3.5 hrs Winter
>
>To UNSUBSCRIBE from the 'meteorobs' email list, use the Web form at:
>http://www.tiacdot net/users/lewkaren/meteorobs/subscribe.html
>

To UNSUBSCRIBE from the 'meteorobs' email list, use the Web form at:
http://www.tiacdot net/users/lewkaren/meteorobs/subscribe.html

Follow-Ups: