This page lists several typical examples of EIS studies created for use under the new Hinode data-volume management scheme.

If you want more general guidance about operational restrictions on observing with EIS using the new antenna, then just go over to our Wiki page on Observing with EIS and the S-band Antenna.

There are now (* as of 2008 Jun 25) almost 325 pre-defined studies (including both science and so-called engineering studies) already available if you want to make observations with EIS.

The details of each study, such as line list, window size, exposure time, etc. can be accessed online at the Hinode/EIS website (MSSL). This is a very powerful tool where you can not only look up a Study by its ID number, but also immediately access all the FITS files created by that study. That way you can take a look at the real data and see whether it's appropriate to what you want to do!

Alternatively you can use the EIS planning tool, which is distributed within Solarsoft.

To run the EIS Planning Tool, first ensure that you've followed the guidelines for its set-up. To make sure that you're pointing at the official studies database (OSDB), first type

The easiest thing to do is to look up a study the website. But to look up a study in SolarSoft just to use the command

There, you can look at the details of the rasters (i.e. component parts that make up a study). Go to EisXstudy for a walk-through on how to use this interface.

On the Hinode/EIS website there two especially relevant and useful webpages:

      This page lists all studies created so far for EIS observation, and enables user to view deatils of each study. When planning your own observation with EIS, it is recommanded to choose those suitable studies from the list directly rather than to design your own studies (unless been instructed to do so by EIS team).

Warning: EIS studies with IDs below #250 should not be used under the new Hinode data-volume regime!
      Tips: on this page user can click right-side button of each study to search the associated eis fits files (i.e. generated by that study) and have a quick look of thumbnails of the fits files. This may help user to choose the right study and check how the results (eg. intensity, velocity maps) obtained by the study probably like.

      This page is a summary of EIS as-run database. It shows how frequently and when a study was run by EIS. It would be useful when you'd like to search popular studies or simply check when/whether your study has been run.

      Tips: user can view the summary based on different targets such as Active Region (AR), Quiet Sun (QS), etc, and user can sort the summary by study ID or running times.


EIS Daily Plan can be accessed from DARTS website, where you may find lots of text files. These files just list EIS daily activities along EIS Observing Timeline.

On Hinode Daily Events Page, you can check all three instruments' (EIS, SOT, XRT) daily events.

One thing you'd probably like to have a look is DR allocation table. For example, on 2008/06/21 (Sat):
This will give you a rough idea of the allocated EIS volume for a three-day plan.

Examples of EIS typical studies under the low data-volume restriction:

Active Region
  • PRY_footpoints_lite (Study 000241)
Study 000241:

ACRONYM: PRY_footpoints_lite

This is a variation on the study PRY_footpoints_v2 designed for
periods when EIS has a *low data rate*. The study has a wide range of
lines and diagnostics and is suitable as a general purpose AR study.

Study summary
TARGET:   		Active region
SLOT:     		2"
Raster Type:            Scan
FOV:      		100"x240"
Compression:            DPCM
DATE Volume:  		53.38 Mbits
Spectral Lines:         FeX,184.33;FeXII,186.75;FeXI,188.35;FeXXIV,192.01;CaXVII,192.82;FeXII,195.00;FeXIII,202.04;FeXIII,203.83;OV,248.46;HeII,256.40;FeXVI,262.98;MgVI,268.99;FeXIV,274.20;SiVII,275.35;MgV,276.58;MgVII,278.39;MgVII,280.75;FeXV,284.16

If the contacts allow a period of high data rate, please supplement
this study with PRY_footpoints_v2.

As a context raster, please use PRY_slot_context (duration: 3min).


For FITS files obtained using this study, please visit Studies Available for EIS page and click the button on the right for #241

Quite Sun
  • tr_bright_lo (Study 000251)
Study 000251:

ACRONYM: tr_bright_lo

To observe small scale QS brightenings (blinkers, explosive events,
nanoflares, bright points etc.)

A patch of QS near to disk centre

Study summary
TARGET:   		Quiet Sun
SLOT:     		2"
Raster Type:            Scan
FOV:      		20"x144"
Compression:            DPCM
DATE Volume:  		1.49 Mbits
Spectral Lines:         FeXII,186.88;OV,192.90;FeXII,195.12;HeII,256.32;SiVII,275.35;FeXV,284.16


For FITS files obtained using this study, please visit Studies Available for EIS page and click the button on the right for #251

  • FlareO_slit_AJW (Study 000286)
Study 000286:

ACRONYM: FlareO_slit_AJW

To capture activities in an active region leading to a flare.

Point at a flaring active region.   

Study summary:
TARGET:   		Flare
SLOT:     		2"
Raster Type:            Scan
FOV:      		180"x320"
Compression:            JPEG95
Data volume:            28.37 Mbits
Spectral Lines:         FeX,184.54;FeXII,186.75;OV,192.13;CaXVII,192.82;FeXII,195.12;HeII,256.32;FeXVI,262.98;FeXV,284.16


For FITS files obtained using this study, please visit Studies Available for EIS page and click the button on the right for study #286

Here is a recommendation for a low telemetry slot imaging study. As of today, the estimated data rate is 13 KBits/s. Notice that compression is Q65.

Study 000292:

ACRONYM:  IUU_SLOT_136x400_Q65
Slot imaging. Low data rate. Four 15s exposures at adjacent pointing
positions sampling a 136"x400" FOV in around 90s (there's a 5 second
delay after each exposure). 8" overlapping scan (40" Slot, 32" FMIR step size).
Spectral windows are selected for their spectral purity, diagnosed from
previous 40" observations. JPEG65 compression.

TARGET        		: Active Region (AR)
EXPOSURE TIME 		: 15s (+5s exposure delay)
SLIT          		: 40"
FOV           		: 136"x400"  
ESTIMATED DURATION	: ~15m 41s  (10 repeats)
Data rate		: 10.39 kBits/s
Data Volume (per hour)	: 37.4 MBits/h 



Here are two examples of expected performance for Active Region (on top) and Quiet Sun (bottom) targets. These are animated GIFs of just a few frames. Reload page if movies are not running. The Fe XXIII spectral window is a blend of several lines. That line in particular is only significant at very high temperatures.

--Ignacio Ugarte-Urra, 17-Nov-2008