(meteorobs) Long path meteor -spiraling- *Magnified*

[Thomas Ashcraft]

Follow-up to the post regarding possible rotation visible of the meteor 
when magnified:

It was suggested off-list that the apparent rotation was due to 
interlacing and software processing artifacts.  As a test, I processed 
and magnified a video of a similar meteor from my archives and I now 
think the "rotation" is indeed a product of the software processing as 
it also shows rotation.  Here is a quick test movie and I did not add 
text or labels:
http://www.heliotown.com/Meteorrotationtest_Ashcraft.mp4

Thomas in New Mexico


On 12/1/11 7:41 PM, Thomas Ashcraft wrote:
>> UPDATE:
>>
>> On 12/1/11 8:23 AM, Thomas Ashcraft wrote:
>>> Dec 01, 2011  2:35:54 am MST.
>>>
>>> There was a very long path meteor over north-central New Mexico last
>>> night.  Visible flight time lasted ~ 13 seconds.
>>>
>>> All-sky camera view with stereo forward scatter:   Movie.  1 MB  .mp4
>>> format.
>>>
>>> http://www.heliotown.com/FBs20111201_093554ut_Ashcraft.mp4
>>>
>> Update to previous post:
>>
>> For further analysis I magnified this meteor in Final Cut Express (movie
>> making software for Macs) and slowed it down and it is interesting to
>> see this particular meteor clearly spiraling.
>>
>> Here is a longer movie that includes the magnification.  4 MB  .mp4 format
>> http://www.heliotown.com/FBmagDec012011_093554ut_Ashcraft.mp4
>>
>> Thomas Ashcraft near Santa Fe
> Further update:
>
> Someone suggested that the apparent spiraling of the meteor may be
> interlacing artifacts and could also be frame grabber artifacts.
>
> Any further analysis is welcome. Thank you.
>
> Thomas in New Mexico
>
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