(meteorobs) Large fireball over Arizona Dec 11 2013 - video from near Santa Fe

[Steve Witt]

Hi Jodie,

I run Node 18 in Lake Station, In. I was wondering how you generated the attached image?

Best,
Steve


 
Steve Witt
IMCA #9020
http://imca.cc/


----- Original Message -----
> From: Jodie Reynolds <spacerocks at spaceballoon.org>
> To: Jim Wooddell <nf114ec at npgcable.com>
> Cc: Meteor science and meteor observing <meteorobs at meteorobs.org>
> Sent: Wednesday, December 11, 2013 2:30 PM
> Subject: Re: (meteorobs) Large fireball over Arizona Dec 11 2013 - video	from near Santa Fe
> 
> Hello Jim,
> 
> Let me first take the opportunity to ask other camera owners a favor:
> 
> Please go toss a black plastic trash bag or a blanket or something
> over your camera some evening and record thirty seconds or so of
> nothing but that black cover.  This creates dark frames, and allows
> us to stack your video to acquire more reference objects while
> simultaneously allowing us to subtract the hot and dead pixels (some
> of these cameras have a lot).  My cameras, with the exception of the
> Sandia Sentinel camera, are pixel mapped in the camera - subtraction
> happens before it even reaches a recorder.
> 
> Bonus points for recording a minute of video a few times over a few
> separate nights with no events and no moon, then storing them with
> precise time and date.  These allow us to stack the frames and build
> a known calibration profile.
> 
> In Thomas' example:
> East/West are mirrored, and the distortion of the
> lens isn't too bad, although down in that corner like that you're
> never going to get _that_ close for such a short event.  The moon is
> a little lower than I'd expect suggesting some stretching out at the
> edges that would need to be corrected.  Without another camera that
> can see the event through the region of critical focus, I doubt
> anyone would make it very far though.
> 
> 
> 
> Here's his sky with grid marking, close enough for the data that's
> there:
> 
> http://www.spaceballoon.org/20131211_021057AZ8361_Ashcraft-Sky.png
> 
> 
> --- Jodie
> 
> Wednesday, December 11, 2013, 11:57:23 AM, you wrote:
> 
>>  Hello Thomas,
> 
>>  Can you please provide a calibrated Azimuth and Elevation for the 
>>  Beginning and End of this event, please?
> 
>>  Thanks!
> 
>>  Jim Wooddell
> 
> 
>>  On 12/11/2013 8:43 AM, Thomas Ashcraft wrote:
>>>  Dec 11 2013
>>> 
>>>  My all-sky camera caught the large fireball over southern Arizona at 
>>>  02:10:57 UT.  The fireball was over 350 miles from my observatory.
>>> 
>>>  Not sure if there might be any useful data since it is miniscule at 
>>>  the edge of my field of view.
>>> 
>>>  In the video the meteor appears at lower screen right passing near the 
>>>  bright dot which is Venus. NOTE:  The Moon is at low screen center, 
>>>  *not* to be confused with the fireball please.
>>> 
>>>  http://www.heliotown.com/FBns20131211_021057ARIZ8361_Ashcraft.mp4
>>> 
>>>  Thomas Ashcraft  -  Heliotown  -  New Mexico
> 
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> 
> 
> 
> -- 
> Best regards,
> Jodie                            mailto:spacerocks at spaceballoon.org
> 
> 
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