Fwd Re: (meteorobs) IMO METEOR SUMMARY REPORT: 11/12 Aug 2004, Lew Gramer (GRALE)

[putmi]

Hi Lew and list,

For the big nights (Perseid, Geminid maximum) I am always busy with 
1 minute counts. Perhaps, this is an old usage I kept after the 
famous Leonid storms...mmm sweet memories..   This is a very 
intensive way of observing (I think some people will find this 
insane..), but it keeps you very busy the whole night long. After 
the observations, I divide the data into 5 or 10 minute periods and 
1 hour summary's.

This year during the Perseids, the minute counts went up to 6 
Perseids. This was at 21.04 UT ; during the outbursts and WITH the 
radiant still low (at +-22 degrees). At the end of the night, I had 
several counts of 5 Perseids/ minute. In 2001 with the Geminids ; I 
had minute counts of 7-8 GEM's! 

Hoping for a new 1 minute counting session during 13-14/12/04...

Kind regards,

Michel,  who is dreaming of a new 1 minute counting session during 
13-14/12/04...
 



--- In meteorobs at yahoogroups.com, "Lewis J. Gramer" <lgramer at u...> 
wrote:
> I think Rainer meant for these comments to go out to all
> 'meteorobs' readers! Thanks for the feedback, Rainer. In
> another private email, Rainer also mentions that there IS
> a set of guidelines for reporting periods during "heavy
> activity" like a Perseid peak. These are online at:
>   http://www.imo.net/visual/major03.html#peaks
> 
> PS: I'll take another look at my Excel spreadsheet today,
> and see what period times make sense for the activity! I
> also think it may be good to make TWO separate versions
> of that spreadsheet - one version for "normal" reports,
> and one for higher activity like the Perseid peak (with
> a magnitude distribution line for each period for one or
> more of the showers observed, for example)...
> 
> Clear skies,
> Lew
> 
> 
> -----Original Message-----
> From: RainerArlt [mailto:rarlt at a...]
> Sent: Wednesday, August 25, 2004 2:01 AM
> To: Lewis J. Gramer
> Subject: Re: (meteorobs) IMO METEOR SUMMARY REPORT: 11/12 Aug 
2004, Lew Gramer (GRALE)
> 
> 
> 
> On Tue, Aug 24, 2004 at 07:39:08PM -0400, Lewis J. Gramer wrote:
> > [...]
> > And the usefulness of my "NAMN-Report.xls" Excel spreadsheet was 
really
> > brought home to me on this report: notice in my original report 
I divided
> > my whole observing session into THREE EQUAL periods - each less 
than one
> > full hour of Effective Observing Time (Teff = total time minus 
breaks and
> > meteor recording "dead time"). As I mentioned in a prior report 
from this
> > week, this is NOT the normally recommended way of dividing 
sessions into
> > Periods - in either the IMO or the old AMS reporting methods.
> 
> There is no explicit rule in the IMO recommendation for period
> division. The pamphlets somwhere say periods should not be
> shorter than an hour. That's meant for a 'normal' observation,
> no high activity. For very many observers though, the 'normal'
> observation is the one of a major-shower maximum, so they get
> confused. I am tempted to take that rule out of the IMO web
> pages.
> 
> Let me remind all observers that small observing periods are
> essential in reporting about major-shower maxima. Even if a 15-
minute
> period contains a very meagre number of Perseids, there may be
> 20 other observers covering the same period, and the total
> Perseid number is fully meaningful.
> 
> It is hard to give a rule for how long periods should be.
> For any major-shower maximum, periods of 15 minutes duration
> will be appropriate in most cases. If short-lived features
> are expected, 5-minute periods are excellent.
> 
> A couple of years ago, I really received e-mail messages with
> 1-hour Leonid periods and the question "do you already know when
> exactly was the peak?" ...
> 
> Best wishes,
> Rainer
> 
> 
> --
> Rainer Arlt  --  Astrophysikalisches Institut Potsdam -- www.aip.de
> Visual Commission - International Meteor Organization -- 
www.imo.net
> rarlt at a... --  phone: +49-331-7499-354  --  fax: +49-331-7499-526
> 
> 
> 
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