>> We don't use Posture, but I've tried the equivalent sort of filters and find
>> that they tend to cause some loss of real data as well.
>
> That is indeed the case - but hey: If we record 20,000 meteors a month, it's
ok if we miss 50 because of automated filters ...

It's always a tradoff between purity and completeness.  You have to
decide what's more important.  Here's it's purity.

Malcolm

Hi Sirko,

Have gotten back to have another play with my Metrec setup.  When I
first started it up with the V4.1 installation, it was working OK but
after installing V5 for DOS, the hardware error is back.  It don't
think it is related to the upgrade - this 'on and off' behaviour has
been there before.

For whatever reason, my config.sys file is empty ... nothing at all
in it.  I assume there is only one config.sys and that it is in the
drive root directory.  Is that appropriate under a Win98
installation?

Not sure where to look next?

Thanks,
Steve Kerr.

>
>
> Steve,
>
> > I have been working on V4.1. I assume that the Readme file is
> unchanged from V5 for DOS and that I don't need to change drivers for
> the Matrox card? I will give that a try.
> the readme file is not yet adapted for V.5, but there only minor
> deviations. There are two or three new parameters, which you will
> find in the corresponding CFG file. The driver is the same.
>
> Best,
> Sirko
>
> --
> ************************************************************
> * Sirko Molau * *
> * Abenstalstr. 13b * __ *
> * D-84072 Seysdorf * " 2B v 2B " *
> * Germany * *
> * phone: +49-8752-869437 * Shakespeare *
> * email: sirko@... * *
> * www : www.molau.de * *
> ************************************************************
>
>

Thanks, I might be able to use those.

The worst problem with false alarms comes from clouds when we have a moon.
The second class comes from aircraft, which are a problem for cameras in
areas like Denver (not so much for rural cameras).

I'm looking at identifying clouds by their property of usually generating
events that are physically huge- covering hundreds or thousands of pixels,
but which are also very short- just a few frames. Aircraft I should be able
to filter by noting the way they usually generate multiple events in close
succession, with a small shift in position between them.

We don't use Posture, but I've tried the equivalent sort of filters and find
that they tend to cause some loss of real data as well.

Chris

*****************************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com


----- Original Message -----
From: "Sirko Molau" <sirko@...>
To: <metrec@yahoogroups.com>
Sent: Thursday, December 03, 2009 2:36 PM
Subject: Re: [MetRec] Meaning of a couple logged terms


Hi Chris,

> There are two values in the log file which I'd wondering the meaning of.
> The
> first is 'pixel' and the second is 'å' (the third and sixth items given
> after the meteor frame coordinates). I've always ignored these, but I'm
> exploring ways of automating false alarm detection during post processing
> (on some cameras we get 1000 false events per night) and trying to use
> these
> additional terms to produce a filter of some sort.

these are internal parameters during the detection process which reflect how
well the meteor was recorded. Pixel stands for "number of pixels above the
detection threshold (at maximum)" - the more pixels, the higher the chance
to have a real object. The second parameter (which should be a sigma, but
may be listed as another special character if you used a different char set)
tells you how many times the object was above the current detection
threshold (at maximum). 1.0 means it was just at the threshold, 2.0 means it
was twice the threshold, etc. Again, the larger the value, the more obviuos
the object.

Best,
Sirko

PS: What kind of false detections do you get? There are a number of PostProc
command line parameters that help you in these cases. A typical problem are
sky beamers with low clouds, for example. The will cause a number of false
detections in short succession as the beam crosses the fov. In this case, I
typically run first a postproc -maxcount 3 to delete typically 50-70% of the
false detections.

From: Sirko Molau

To: metrec@yahoogroups.com

Sent: Monday, November 30, 2009 8:21 PM

Subject: Re: [MetRec] hi , newby

 

Hi Matt,

 

currently MetRec does not support this grabber, as I'm using MIL Lite 7.5 for Win and 6.01 for Dos, but the Morphis is only supported from MIL 8.0 onwards.

Given that I get 8.0 somewhere for free I may test at some time to support this grabber. If I were you, however, I wouldn't wait for that day. ;-)

 

I recently sold 4 Matrox Meteor II to Javor at 65 Euro each, so currently I have none here. It usually takes a few weeks to get one at such a rate, so chances are ~50/50 that I get one more before Christmas. I'll reserve it for you if you like.

 

Best,

Sirko

 

--
************************************************************
*   Sirko Molau                 *                          *
*   Abenstalstr. 13b            *              __          *
*   D-84072 Seysdorf            *       " 2B v 2B "        *
*   Germany                     *                          *
*   phone: +49-8752-869437      *             Shakespeare  *
*   email: sirko@molau.de       *                          *
*   www  : www.molau.de         *                          *
************************************************************

----- Original Message -----

From: "mattobr" <mattobr@ntlworld.com>

To: <metrec@yahoogroups.com>

Sent: Monday, November 30, 2009 8:20 PM

Subject: [MetRec] hi , newby

hi everyone

a little introduction , i been interested in astronomy and meteors since i was a kid and now found metrec, i had a go at using tv cards and cctv software but no luck, 

i seen the software works on the matrox meteor cards , but wondering if it works on the Matrox Morphis MOR/2VD-Frame Grabber card as there some on ebay for £15 + postage

if not , anyone know where to get a meteor card at a resonable price

cheers matt





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There are two values in the log file which I'd wondering the meaning of. The
first is 'pixel' and the second is 'å' (the third and sixth items given
after the meteor frame coordinates). I've always ignored these, but I'm
exploring ways of automating false alarm detection during post processing
(on some cameras we get 1000 false events per night) and trying to use these
additional terms to produce a filter of some sort.

Chris

*****************************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

Hi Sirko,

Thanks for the reply.  It might be quite a few days before I get back to try
some of these fixes.

>
> Which version of MetRec are you using: Version 4 or the new beta version
> 5? I would suggest you to donwload the later one, which runs already
> quite stable.
>

I have been working on V4.1.   I assume that the Readme file is unchanged from
V5 for DOS and that I don't need to change drivers for the Matrox card?  I will
give that a try.

> How do you run grab: Do you boot Win98 and try to run grab in a DOS box,
> or do you restart Win98 in DOS mode? I would suggest not to boot Win98
> at all after you installed the driver, but run MetRec directly from the
> DOS prompt. The readme file tells you how to achieve this.
>

I have been restarting the machine in DOS as you suggest.

> Did you check that the is no emm386 in your config.sys?
>

Ah!  I saw that in the Readme file but didn't know enough about computers to
know to look in config.sys.  I will check this one out.


Thanks again,
Steve Kerr.

> ---------- Forwarded message ----------
> From: Denis Denisenko <denis@...>
> Date: 2009/11/26
> Subject: (meteorobs) Important! Check your Leonids images of Nov. 15-18
> To: Meteor Observing Mailing List <meteorobs@...>
>
>
> Dear meteor observers!
>
> Possible Nova in Eridanus was discovered by famous Japanese astronomer
> Koichi Itagaki on Nov. 25.536 UT (CBET 2050) at magnitude 8.1.  It was
> then retrospectively found on ASAS images dated by as early as Nov.
> 19.241 UT being yet brighter at 7.3 mag (AAVSO Special Notice #181).
> The star has 15th magnitude at quiescence.
>
> No images of possible Nova Eridani are available between Nov. 10.236 UT
> when it was fainter than 14.0 and Nov. 19.241 UT.  Looks like the real
> maximum has been missed!  Since the spectrum of the star in outburst
> shows bright Balmer emission lines with expansion velocity of 3400-3600
> km/s, this object is likely a classical Nova rather than a cataclysmic
> variable of WZ Sge type.  This means that the real outburst amplitude
> should have been 13-14 magnitudes rather than the observed 7.5, and some
> time between Nov. 10th and 19th it *could* have been as bright as mag
> 1-2!!!  But nobody knows it for sure.  Not yet!
>
> Here is where your help is needed.  Please check your photos (and
> probably even videos) from the nights of 2009 Leonid shower activity
> containing Orion and its surrounding constellations.  The Nova is
> located near the Orion-Eridanus border, about 7 deg West and 2 deg South
> of Rigel.  Precise coordinates of the star are:
>
> R.A. = 04h47m54.2s, Decl. = -10d10'43" (J2000.0)
>
> The position of star is shown with blue dashes on the following chart
> (stars to 6.5m are shown):
>
>
http://hea.iki.rssi.ru/~denis/NovaEri2009Nov18.gif<http://hea.iki.rssi.ru/%7Eden\
is/NovaEri2009Nov18.gif>
>
> If you find the images taken any time between Nov. 10 and Nov. 19
> covering the area of interest, please check them for the presence of the
> Nova Eridani 2009, or send them directly to me for the analysis and
> photometry via E-mail address below in my signature.  Also, feel free to
> send this message to other mailing list and circulate it among your
> fellow astronomers.  This is really a rare coincidence that many images
> of the sky were taken just in time during the Nova outburst because of
> the Leonid meteors activity, and reconstructing the light curve of this
> variable star would be very important.
>
> Best regards,
>
> Denis
> --
> Denis V. Denisenko
> Space Research Institute
> Profsoyuznaya st., 84/32
> 117997, Moscow, Russia
> denis@...
> _______________________________________________
> Mailing list meteorobs: meteorobs@...
> To UNSUBSCRIBE, email: owner-meteorobs@...
> http://lists.meteorobs.org/mailman/listinfo/meteorobs
>

hi everyone

a little introduction , i been interested in astronomy and meteors since i was a
kid and now found metrec, i had a go at using tv cards and cctv software but no
luck,

i seen the software works on the matrox meteor cards , but wondering if it works
on the Matrox Morphis MOR/2VD-Frame Grabber card as there some on ebay for £15 +
postage

if not , anyone know where to get a meteor card at a resonable price

cheers matt

Hi,

After many years of working towards it, I am getting close to commissioning my
Metrec setup.  One of the delays has been around a mystery error that had made
running the grab.exe impossible.  This evening, grab.exe starting working again
so I have now realised that the error comes and goes with no obvious connection
with anything else.  The error text doesn't help me much although the mention of
'device not available' is suggesting that it might be hardware related to the
Matrox card.  If anyone can help me with trying to resolve this, it would be
very much appreciated.

The text that appears after invoking the Grab.exe is ...

DOS/4GW Protected Mode Run-time Version 1.97
Copyright (C) Rational Systems, Inc. 1990-94
DOS/4GW Error (2001): exception 07h (device not available) at 150:001C2C50
TSF32: prev_tsf32 5278
SS   158  DS   158  ES  158  FS   0  GS  20
EAX 3FECDA  EBX 3FECD8  ECX  4000 EDX 42FF01
ESI 3FED2C  EDI 3FFEG0  EBP     0 ESP 427E1C
CS:IP 150:001C2C50  ID 07  COD 3FECDA  FLG 10202
CS= 150, USE32, page granular, limit FFFFFFFF, base 0, accGF9B
SS= 150, USE32, page granular, limit FFFFFFFF, base 0, accGF93
DS= 150, USE32, page granular, limit FFFFFFFF, base 0, accGF93
ES= 150, USE32, page granular, limit FFFFFFFF, base 0, accGF93
FS= 0, USE16, byte granular, limit 0, base 14, acc 0
GS= 20, USE16, byte granular, limit FFFF, base 8F50, acc93
CRO:PG:0 ET:1 TS:1 EM:0 MP:1 PE:1 CR2:F6145EBF CR3:0
Crash Address (unrelocated) =1:0002CC50

The PC is a Pentium III running Win 98SE

Any help with this would be very much appreciated.
Thanks,
Steve Kerr.

Hi.
Few days ago I had to reset BIOS. I changed time, but I forgot to change date,
so date in log file is wrong and name of the directory, where are stored bmp
pictures for each meteor, is wrong too.  Is possible to change date and name of
directory with postproc or I have to change them manually?
CS, Mitja

Hi Sebastià,

the IR tag is a bit tricky and mainly depends on the manufacturer. As it
is known the refractive index changes with the wavelenght. In optics the
results is achromatism or chromatic aberration, which means that the
focus of the different colours are not in the same point (as desired).
Many of the cameras that we use have some IR sensitivity which results
in an non-visual achromatism. It is usually seen in good visual
telescopes, impossible to be focused when using an IR-enhanced CCD.
Manufacturers give two solutions for this "problem":

- cheap:          IR night lenses, that focuses the best close to the
IR. The focus is only shifted towards IR.
- expensive:    IR day-night lenses, that focuses all the wavelenghts
from blue to almost the micron. This solution needs more lenses (or
better ones) that the previous solution (like the achromatic triplets
for the eyepieces).

Aspheric means that some of its elements have surfaces different from
the spherical ones. These elements are more expensive but can correct
many aberrations. They usually replace groups of several elements.

So, in conclusion, are IR aspherical lenses the best choice? Not sure.
We need to test it. Actually, the quality of the lenses depends on other
parameters appart from these, so it is not easy to choose the best lens.
Some time ago, a paper about it appeared in WGN, but I think many of the
lenses studied there are not easy to buy now. Maybe Sirko can help us.

Un saludo,

Paco Ocaña



Sebastià Torrell escribió:
> My experience says they are important high quality lenses instead of
> lenses focal relationship too open.
> For perhaps scenes are good, but not for point objects, as aberrations
> that do not improve the stars, yet it increased the backlight.
>
> My question is, if someone knows exactly what the tags mean IR
> Aspherical lenses and lenses?
>
> un saludo
>
>
> ------------------------------------
>
> ------------------------------------------------------------------------
> MetRec Homepage: http://www.metrec.org
> MetRec Download sites:
> http://www.metrec.org/download
> http://ftp.imo.net/pub/software/metrec
> ------------------------------------------------------------------------
> To unsubscribe from the MetRec info list, send a blank message to
> metrec-unsubscribe@..., or visit groups.yahoo.com/group/metrec
> -----------------------------------------------------------------------Yahoo!
Groups Links
>
>

ok
I allready know these group

waht I try to find is sombody that are active whit your system

and made some allsky survy


jack 47'n 71'W



> You could contact the Quebec Centre of the RASC at:  http://
> www.sracquebec.org/
>
>
> On 15-Aug-09, at 11:40 AM, Jacques Savard wrote:
>
> > I live in quebec city canada
> >
> > I have some computer experience
> >
> > and some atm also
> >
> > I plan to built a allsky whit some old webcam and vhs camcorder lens
> >
> > 4.8 mm
> >
> > do some of your meber are near me in quebec or mtl?
> >
> > jack 47'n 71'W
> >
> >
>

I live in quebec city canada

I have some computer experience

and some atm also

I plan to built a allsky whit some old webcam and vhs camcorder lens

4.8 mm

do some of your meber are near me in quebec or mtl?

jack 47'n 71'W

My experience says they are important high quality lenses instead of
lenses focal relationship too open.
For perhaps scenes are good, but not for point objects, as aberrations
that do not improve the stars, yet it increased the backlight.

My question is, if someone knows exactly what the tags mean IR
Aspherical lenses and lenses?

un saludo

Hi list,

I need some lenses for a Watec 902 / 902HS and I don´t know if it need
DC auto-iris or Video Auto-Iris. I already have a Watec 902H and it
needs Video ones, which are not as usual.

Anyone using one of these cameras? Which lens do you use?

Thanks,

Paco Ocaña