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Re: (meteorobs) Re: NM1999Aug9/10 meteors dull
Steve...
I just got my 6 meter transverter working again yesterday, just in time to
monitor the Perseids. I listen on the video carrier of TV channel 2
(55.240/250/260) for "pings". I was pretty amazed listening this morning
(about 0330-0430 UT) as I was hearing what amounted to 100-125 pings per
hour.
I was just listening "casually" not really counting but the activity seemed
so high that I went outside for a while to observe visually. Unfortunately I
didn't "see" any!
I admit I haven't been "pinging" for quite a while, but it sure seemed like
there was a lot of activity on 6 meters this morning.
I will be observing visually and photographically Wednesday and Thursday
nights while running 8 hour video tapes (monitoring 55.260 audio only) with
WWV time stamp. I'm in Louisville, KY EM-78.
Good viewing!
Mark
N4OKX
-----Original Message-----
From: Steve Harrison <ko0u@os.com>
To: meteorobs@jovian.com <meteorobs@jovian.com>
Date: Wednesday, August 11, 1999 12:25 AM
Subject: Re: (meteorobs) Re: NM1999Aug9/10 meteors dull
>At 06:03 PM 1999-08-10 -0400, Norman McLeod wrote:
>>At this point the Perseid max is 2.5 days away ; there still
>>ought to be more Perseids on August 10 than this. I would have expected
>>about 10/hour in a normal year. Now I'm concerned whether the max will
>>continue at 2/3 normal strength this year, as it has done throughout the
>>90's except for 1997. The peak is sharper and the hours straddling the
peak
>>have become poorer.
>
>We radio amateurs have, for a number of years, noticed that the number of
>radio-reflecting meteors appears to decrease during the few days prior to
>the Perseids peak. I'm not certain whether that's still holding true as of
>this morning; the number of reflections I heard on my daily 1130-1145 UTC
>schedule on 144 MHz appeared to be about the same today as during most days
>of last week. I did note that a few hams have seemed to think there was a
>small increase in reflections on 50 MHz several hours ago (approximately 20
>UTC); but that could just be because folks were listening for meteor
>reflections due to the approaching peak, rather than an actual increase
>over sporadic background. In any case, the "new" peak expected this year at
>23 UTC could hardly come at a worst time of the day for we radio meteor
>enthusiasts since the apparent meteor velocities will be compromised due to
>entering the atmosphere over North America in the same direction as the
>earth's rotation. I would expect this to cause very little increase in high
>frequency radio meteor reflections such as 144 MHz and perhaps a
>barely-noticeable increase in low-frequency reflections in the 50 MHz band.
>I would expect the number of FM and TV broadcast reflections to range
>somewhere in between. The higher the entering velocity, the higher the
>frequency reflected and the higher the altitude at which the trail ionizes,
>which increases the distances between a transmitter and receiver for a
>given reflection.
>
>Clear skies,
>
>SteveH, K0XP
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