This page (revision-27) was last changed on 03-Aug-2023 16:53 by Peter Young

This page was created on 02-Apr-2013 16:51 by Peter Young

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Version Date Modified Size Author Changes ... Change note
27 03-Aug-2023 16:53 5 KB Peter Young to previous
26 18-Apr-2021 18:50 5 KB RichardAdacy to previous | to last CPA
25 21-Nov-2016 13:13 5 KB RichardAdacy to previous | to last CPA
24 07-Oct-2016 17:32 5 KB Peter Young to previous | to last Added section about downloading the cutout data
23 23-Mar-2016 18:53 5 KB Peter Young to previous | to last
22 23-Mar-2016 16:16 5 KB Peter Young to previous | to last
21 23-Mar-2016 16:15 5 KB Peter Young to previous | to last

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At line 16 changed one line
Go to the [JSOC exportdata webpage|http://jsoc.stanford.edu/ajax/exportdata0.html]. In the 'RecordSet' box, type:
Go to the [JSOC exportdata webpage|http://jsoc.stanford.edu/ajax/exportdata.html]. In the 'RecordSet' box, type:
At line 38 changed one line
For 'Protocol' leave it as 'FITS'. I suggest using '**NONE**' for compression as the cutout files generally don't take up much space. Type in your name and e-mail, and then click on 'Submit Export Request'. After a couple of minutes wait, click on 'Submit status request' and you should see a link to a tar file containing your data (it may take longer for large data-sets).
For 'Protocol' leave it as 'FITS'. Type in your name and e-mail, and then click on 'Submit Export Request'. ''If you're doing this for the first time, then you will have to register.'' After a couple of minutes wait, click on 'Submit status request' and you should see a link to a tar file containing your data (it may take longer for large data-sets).
At line 40 added 2 lines
Note that cutouts will be rice-compressed images (there used to be an option to download uncompressed images, but this has been removed). See below for how to read compressed images quickly.
At line 55 added 10 lines
!!Reading cutout images
A cutout image can be read with:
{{{
IDL> read_sdo, file, index, data, /use_shared_lib
}}}
The /use_shared_lib keyword is highly recommended as it greatly increases the speed at which rice-compressed images are read. It may not work on all computers though (Windows?).
At line 70 removed 2 lines
''Why not download Rice-compressed files?''\\
When read_sdo reads these files there's a small delay as each file gets uncompressed. This can be irritating if you're reading a large number of files in one go. Reading the uncompressed files is much quicker.
This page (revision-27) was last changed on 03-Aug-2023 16:53 by Peter YoungTop