(meteorobs) October 30th 2012 Fireball Over Southern Mid-West USA

bob bob71741 at yahoo.com
Thu Nov 1 15:25:57 EDT 2012


Jay - Here are links to two fairly current papers describing the CAMS Network and discussing the hardware, software, and methods.


http://cams.seti.org/CAMSoverviewpaper.pdf
http://www.imo.net/imc2010/talks/Gural.pdf




--- In meteorobs at yahoogroups.com, "Jay Salsburg" <jsalsburg at ...> wrote:
>
> Hello Chris
> 
> This is why I am experimenting, to nail down what is and is not acceptable.
> There needs to be White Papers on all this work and development in a
> Dedicated Web Site Clearinghouse for just such Information like you mention
> below. My main effort is to create a device for entry-level Observers so
> they can report what they see and perhaps record it, not so much for strict
> Scientific measurement for subsequent publication. I may do this later;
> upgrade the Observatory to do this, if I can afford it, but as you know, the
> Camera and Lens are expensive. Think of this low cost device for Amateur
> Astronomers who buy their first low cost Telescope, it is for the
> uninitiated, those who will spend more money later when they get Meteors and
> Astronomy in their blood. Many levels of development are yet underdone,
> there is a need for serious Software that does the job of automating
> detection and storage of the processed results in the CLOUD. If you know of
> any Software like this please share.
> 
> -----Original Message-----
> From: meteorobs-bounces at ...
> [mailto:meteorobs-bounces at ...] On Behalf Of Chris Peterson
> Sent: Thursday, November 01, 2012 12:01 AM
> To: Meteor science and meteor observing
> Subject: Re: (meteorobs) October 30th 2012 Fireball Over Southern Mid-West
> USA
> 
> I believe that the practical difference between the HAD and HAD II sensor is
> pretty insignificant for meteor work. Avoiding color sensors is critical,
> however, if the goal is to detect faint meteors and not just fireballs. At
> 30 fps, sensitivity is largely determined by readout noise, not quantum
> efficiency. At best, the HAD II offers a couple dB improvement in
> sensitivity at normal video frame rates. To achieve the maximum sensitivity
> requires longer integration times, on the order of a second or two. Many
> security cameras offer this (called sense-up, or other names), but the
> feature is not desirable for meteor work, as you lose timing information and
> the increased sky background actually results in lower sensitivity to
> meteors than you see at 30 fps.
> 
> Sensors with significantly lower readout noise may prove useful for meteor
> work, but the biggest immediate improvement comes from getting rid of the
> analog video interface completely. Not only does that interface typically
> reduce the dynamic range it's possible to capture from the sensor, but the
> digitization process introduces _significant_ geometric errors, which limit
> the accuracy of calculated centroids, both of astrometric references, and
> most seriously, of meteors. 
> Unfortunately, I'm not aware of any inexpensive low-light cameras using HAD
> sensors which incorporate digital interfaces (USB/Firewire/Ethernet). When I
> find one, though, it will quickly find its way into one of my meteor
> cameras!
> 
> Chris
> 
> *******************************
> Chris L Peterson
> Cloudbait Observatory
> http://www.cloudbait.com
> 
> On 10/31/2012 10:26 PM, Jay Salsburg wrote:
> > Hello Jim
> >
> > Thank you for your inquiry.
> >
> > I have been performing research on a camera with all new technology 
> > that I tested in my driveway and successfully observed meteors in its 
> > video. Since I do not have the money to buy every camera that seems a 
> > candidate for a Meteor Observatory, I spent many weeks investigating 
> > alternatives based on published specifications. I found a Camera for 
> > less than $200 employing the new Sony "Super HAD CCD II" Sensor that 
> > sees better than I in the dark and in Color (see link below). I will 
> > publish details of my design after testing it on a high mast if it is 
> > fit for the task of recording video of Meteors, which I should be able 
> > to do soon. I just finished creating a reliable Enclosure. There are 
> > finishing touches yet to install in and on the enclosure like heater
> resistors, a fan, Connectors, and a Mast Mount.
> >
> > http://www.sony.net/Products/SC-HP/cx_news/vol52/pdf/featuring52.pdf
> 
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