[News] Statistics in subwindows (SubWinStat)

[Ewout M. Helmich]

Hi everyone,

Here (attachment) is a short memo with regards to the current status of 
the subwindows statistics and its use in
Groningen. It is probably time for us to start producing these 
statistics for all relevant images.

Regards,
Ewout
-------------- next part --------------
This is a memo meant to summarize the status of subwindow statistics
implementation and use.


Status:
-------

- The SubWinStat functionality in BaseFrame has been ready for use for quite
a while now, but it has not been used in Groningen until now.

- In Groningen SubWinStat objects have been made for all OmegaCAM raw frames.


How to calculate:
-----------------

Calculating subwindow statistics is as easy as adding 2 lines for each
relevant BaseFrame in each relevant DBRecipe (including Ingest.py):

<BaseFrame>.make_subwinstat()
<BaseFrame>.commit_subwinstat()

The order of processing in the recipe is then:

<BaseFrame>.make()
<BaseFrame>.make_subwinstat()
<BaseFrame>.verify()
<BaseFrame>.compare()
<BaseFrame>.store()
<BaseFrame>.commit()
<BaseFrame>.commit_subwinstat()


Where to calculate:
-------------------

Here is a list of classes/recipes where subwindow statistics may be useful:

---------------------------------
class               -- recipe
---------------------------------
Raw<something>Frame -- Ingest.py
BiasFrame           -- Bias.py
HotPixelMap         -- HotPixels.py
ColdPixelMap        -- ColdPixels.py
DomeFlatFrame       -- DomeFlat.py
TwilightFlatFrame   -- TwilightFlat.py
NightSkyFlatFrame   -- NightSkyFlat.py
FringeFrame         -- FringeFlat.py
MasterFlatFrame     -- MasterFlat.py
QuickCheckFrame     -- astro/recipes/Quick_Check.py
IlluminationCorrectionFrame -- IlluminationCorrection.py

RawScienceFrame (?) -- Ingest.py
ScienceFrame (?)    -- Science.py/Reduce.py

There are a few questionable places in the image pipeline where we could
calculate subwindow statistics. For example the pixelmaps there and the
individual weight, as well as the raw, reduced and calibrated science images.


Using subwindow statistics for trendanalysis:
---------------------------------------------

This is an open point.