Hi,

There are a few big EIS fits files which are not easy to be processed by "eis_prep", for example:

20/eis_l0_20070820_170353.fits.gz    122M \\
21/eis_l0_20070821_000022.fits.gz    118M \\
21/eis_l0_20070821_133226.fits.gz    117M \\

%%collapse
*[Click to show more fits files|]
##22/eis_l0_20070822_023009.fits.gz    116M \\
##23/eis_l0_20070823_191420.fits.gz    94M  \\
##24/eis_l0_20070824_001531.fits.gz    92M  \\
##24/eis_l0_20070824_105128.fits.gz    120M \\
##25/eis_l0_20070825_015152.fits.gz    99M  \\
##25/eis_l0_20070825_050529.fits.gz    95M  \\
##25/eis_l0_20070825_093750.fits.gz    89M  \\
##26/eis_l0_20070826_005803.fits.gz    97M  \\
##26/eis_l0_20070826_055213.fits.gz    92M  \\
##27/eis_l0_20070827_045520.fits.gz    97M  \\
##27/eis_l0_20070827_170835.fits.gz    81M  \\
##27/eis_l0_20070827_210723.fits.gz    79M  \\
##28/eis_l0_20070828_005937.fits.gz    72M  \\
%%

These fits files are mostly generated by study eg. "HPW001_FULLCCD_v2": doing "full-ccd" scan (with often over 80 raster positions). 

The typical error message is: "__unable to allocate memory to make array__". However, the machine that running "eis_prep" has fairly big enough memory (%%(color:#009900;)4GB%%). One way to let "eis_prep" keep running is probably to do only [DC-removal|] and [Abs calibration|], not to do [CR|] and [HP|] removal, :-(


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Questions:

#Is there any way to do 'eis_prep' with these big fits files? Or,\\
#Do we need to suggest that normally try to avoid using full-ccd scan with __too many__ raster postions?

Regards,\\

[JianSun]  [{CurrentTimePlugin}]


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Hi, Jian

This is starting to become a big problem, and I think you're asking the right questions.

However, I don't think we should stop taking large data because the current software doesn't allow us to analyse it. This just means we need to think about . We want to take the best data we can and worry about analysing it later. You never know when an instrument/satellite can fail.

This sounds like a major issue for the team meetings in October.

In the meantime, if anyone has comments, please start making them! This is something that really needs to be sorted out.

--[David R Williams|http://www.mssl.ucl.ac.uk/~drw/], 19-Sep-2007