Downloading EIS data from the IDL command line#

Sometimes it can be convenient to download directly from the IDL command line, and two options are available.

VSO#

To search for and download EIS data for a specific date range, the following commands are used:

list=vso_search('16-feb-2011 06:15','16-feb-2011 12:30',inst='eis')
chck=vso_get(list)

There are 64 FITS files corresponding to this time range and they will be downloaded to your current working directory.

eis_vso_day#

To get all of the EIS files for a specific day from the VSO, you can do:

eis_vso_day,'16-feb-2011'

This will download the files to a temporary directory and then ingest them into the EIS file hierarchy using the routine eis_ingest. If you're not sure where the files will be downloaded to, then give the keyword /test. For information on how to organize your EIS data, please check EIS Software Note No. 18.

eis_vso_download_files#

Other way of accessing the VSO is with this routine. It is most useful when used in conjunction with eis_obs_structure. The example below shows how every raster with the name 'Atlas_30' can be downloaded:

s=eis_obs_structure(rast_acr='Atlas_30')
eis_vso_download_files,s

As with eis_vso_day, the files will automatically be downloaded into the EIS file hierarchy.

The second example shows how all narrow slit rasters containing the Fe VIII 185.21 line during the period 1-Jan-2015 to 1-Mar-2015 can be downloaded:

s=eis_obs_structure('1-jan-2015','1-mar-2015')
s2=eis_filter_obs_stric(s,wvl=185.21,/narrow)
eis_vso_download_files,s2

Oslo Data Center#

The Oslo data center can also be accessed from IDL and the initial VSO search described above is performed as follows:

o=obj_new('osdc')
o->condition,'INSTRUME: ,EIS'
o->condition,'EPOCH_START: 16-feb-2011 06:15'
o->condition,'EPOCH_END: 16-feb-2011 12:30'
o->search,out
paths = o->paths(out,/fetch)

One difference compared to the VSO is that the Oslo software makes use of the $HINODE_DATA environment variable (see EIS Software Note No. 18) to download the files into the correct level-0 directory.

Note that, if you perform a search using the web-based search tool at Oslo, at the bottom of the results page will be written the IDL commands that would have yielded the same search results.