(meteorobs) O.T. -Interpreting Sentinels Exposure files(a).

[stange]

I asked J.Chavez about the exposure files in Sentinel Python24 which I could 
not descerne the purpose of, and had previously thought they were supposed 
to be a composite of the meteor travel which was not working correctly. What 
he has told me, and I checked it out, is:

1. When Sentinel takes a meteor capture pictures, we see it as a short movie 
as it looked traveling across the sky when we use the arrow keys or replay 
key.

2. If we use the composite key each time after playing or replaying a 
capture we get a composite of a different sort. It is a composite or frame 
stacking of the meteors travel. This is not a saved file unless we choose to 
save it.

To the point:

3. We can get a 10 stack of frames to create an enhanced star field anytime 
when we select "stack images" in the "Test column". But that does us little 
good for seeing the background stars during the time of the meteor.

4. What Sentinel does, is when a meteor is detected, it creates the (v) data 
& Text files in the "Events" folder, but it also goes further and creates a 
10 frame stack of the star field at the time of the meteor. That is what the 
(a) files are in the "Exposures" folder. These are 10 co-added frames 
stacked into a single image. And sometimes called composites too which can 
confuse the two.....distinct operations of Sentinel.

If you already knew all of this, my apologies. -YCSentinel