(meteorobs) Ed Majden & Sentinel users. -Star Enhancment UPDATE

[stange]

Answer is posted here from Joseph.....

"The latest sentinel system (as of 2006) actually does a 256 frame stacking 
after an event.  Unfortunately, this number is firmly fixed in the sentinel 
box and cannot be changed.  You might try temporarily increasing the 
brightness to try to bring out the stars at the expense of making the event 
images too bright".

So, that leaves us at solution 2. -I had thought it was doing a 10 frame 
stack.
-YCSentinel

----- Original Message ----- 
From: "stange" <stange34 at sbcglobal.net>
To: <meteorobs at meteorobs.org>
Sent: 2008/10/26 21:48
Subject: (meteorobs) Ed Majden & other Sentinel users. -Star Enhancment


> Hello Ed & Sentinel Group.
>
> I have been pondering your long exposure shutter problem looking for a
> solution that would not cause a degradation in fireball capture definition 
> &
> contrast yet bring out the background stars better.
>
> I believe there are two solutions that would not cause excessive cost.
> Neither solution requires a camera modification (which would be difficult
> without a proprietary schematic diagram for the camera anyway).
>
> Solution 1.
> I have e-mailed Joseph as to whether we can write a change in Python
> allowing us to select & increase the number of frames stacked in the event
> "a" file after an event. I expect this will increase the reset & arming 
> time
> which would necessitate consideration of an individuals particular dark 
> sky
> site. i.e., the least amount of stacking which will get the job done. If I
> get an answer... I will post it.
>
> Solution 2.
> The supplementary system Handyavi allows up to 250 frames to be captured
> after an event. This is the "post frames" setting. I ran a quick test
> tonight, setting post frames to 90,(3 seconds). After using avi2bmp, and
> registax software, star images were dramatically improved along with any
> other ambient light. This method does require more computer experience in
> software and is something of a pain.....except when a BIG event takes 
> place.
>
> For whatever it is worth..... YCSentinel
>
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