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.
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!
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.
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.
One thing you'd probably like to have a look is DR allocation table. For example, on 2008/06/21 (Sat):
- PRY_footpoints_lite (Study 000241)
Study 000241: ACRONYM: PRY_footpoints_lite Objective: -------------------- 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 EXPOSURE TIME: 30s SLOT: 2" Raster Type: Scan FOV: 100"x240" ESTIMATED CADENCE: 28m16s 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 USAGE: -------------------- 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). WARNING: None
- tr_bright_lo (Study 000251)
Study 000251: ACRONYM: tr_bright_lo Objective: -------------------- To observe small scale QS brightenings (blinkers, explosive events, nanoflares, bright points etc.) Pointing: -------------------- A patch of QS near to disk centre Study summary -------------------- TARGET: Quiet Sun EXPOSURE TIME: 30s SLOT: 2" Raster Type: Scan FOV: 20"x144" ESTIMATED CADENCE: 5m57s 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 WARNING: None
- FlareO_slit_AJW (Study 000286)
Study 000286: ACRONYM: FlareO_slit_AJW Objective: -------------------- To capture activities in an active region leading to a flare. Pointing: -------------------- Point at a flaring active region. Study summary: -------------------- TARGET: Flare EXPOSURE TIME: 30s SLOT: 2" Raster Type: Scan FOV: 180"x320" ESTIMATED CADENCE: 50m34s 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 WARNING: None
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" SPECTRAL WIND. : 9 COMPRESSION : JPEG65 ESTIMATED CADENCE : ~90s ESTIMATED DURATION : ~15m 41s (10 repeats) Data rate : 10.39 kBits/s Data Volume (per hour) : 37.4 MBits/h WARNING: None
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