BigEISFitsFiles
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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

  • Click to show more fits files
    1. 22/eis_l0_20070822_023009.fits.gz 116M
    2. 23/eis_l0_20070823_191420.fits.gz 94M
    3. 24/eis_l0_20070824_001531.fits.gz 92M
    4. 24/eis_l0_20070824_105128.fits.gz 120M
    5. 25/eis_l0_20070825_015152.fits.gz 99M
    6. 25/eis_l0_20070825_050529.fits.gz 95M
    7. 25/eis_l0_20070825_093750.fits.gz 89M
    8. 26/eis_l0_20070826_005803.fits.gz 97M
    9. 26/eis_l0_20070826_055213.fits.gz 92M
    10. 27/eis_l0_20070827_045520.fits.gz 97M
    11. 27/eis_l0_20070827_170835.fits.gz 81M
    12. 27/eis_l0_20070827_210723.fits.gz 79M
    13. 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 (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, :-(

Questions:
  1. Is there any way to do 'eis_prep' with these big fits files? Or,
  2. Do we need to suggest that normally try to avoid using full-ccd scan with too many raster postions?

Regards,

JianSun 04:34:28 31-Jan-2025 GMT

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, 19-Sep-2007

Hi David,

I agree with you and Harry that we should get science data first and then work out the solution, if there is problem to analyse it.

JianSun 04:34:28 31-Jan-2025 GMT

put your CopyrightNotice in here !