Add sunspot/magnetogram overlays to SolarMonitor

[dpshelio]

Originally reported by: pohuigin (Bitbucket: pohuigin, GitHub: pohuigin)

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The sunspot overlay code has been running on my (p.higgins) machine at LMSAL steadily for a month or so. The code produces new images every 6 hours.

The output is viewable here:
http://www.mmmotd.solarsurfer.org/sunspot_overlays.php

The images are uploaded here:
http://lmsal.com/~higgins/max_millennium/sunspot_overlays/

There are a couple ways that the sunspot overlay images could be added to solarmonitor:

1. Simply grab the PNGs from the LMSAL directory every time solarmonitor runs and save them in the solarmonitor data directory tree (e.g., solarmonitor.org/data/2013/11/04/pngs/ssovr/*.png, for example).
2. Run the overlay code locally. The code is available here:
   https://github.com/pohuigin/max_millennium/tree/master/idl
   The batch that runs the data getting/reading/image making: mmmotd_batch.pro
   The data getting: mmmotd_find_data.pro
   The reading/processing/image making: mmmotd_sunspot_overlay.pro
3. Another option is to hack the part of the code that does the actual overlaying and put that into ARM_REGIONS.PRO on solarmonitor as another type of cut-out image to make.

In my opinion the best option is #1, because I think we should be modularising the solarmontior data product creation, not adding more for ARM_BATCH to do...

To accomplish #1, you would have to write a batch file to:
-make a new SM data directory branch for the day's overlays
-search the remote image directory at LMSAL.com/... for new images
-compare the new images to the images that have already been downloaded to SM
-If new images are found, then copy the images that are found to the local directory
-Then somehow move the new files to the live solarmonitor data directory

Also, a change to the solarmonitor front end PHP will have to be done to display these new images.
I don't know enough about how the new version of the site operates to know what change has to be made...

Also if there is a better way I could be naming the PNG files for use on solarmonitor, let me know.

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• Bitbucket: https://bitbucket.org/solarmonitor/solarmonitoridl/issue/22