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164 03-Dec-2008 11:25 9 KB JianSun to previous | to last
163 17-Nov-2008 19:50 9 KB Ignacio Ugarte-Urra to previous | to last Comment by Ignacio Ugarte-Urra
162 16-Jul-2008 06:14 8 KB David R Williams to previous | to last
161 16-Jul-2008 06:12 8 KB David R Williams to previous | to last

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Study4LowDataVolume
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[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
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The page lists information of EIS study (observing sequences) and several typical examples of EIS study under %%(color:#cc0000;)the new Hinode data-volume regime%%, and the information about %%(color:#cc0000;)operation restrictions%% and %%(color:#cc0000;)regular activities%% by EIS.
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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|SbandObservingInfo].
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There are now (* as of 2008 Jun 25) almost %%(color:green;)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|http://solarb.mssl.ucl.ac.uk/SolarB/] (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!
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There are almost %%(color:green;)290%% stuies (including science & engineering task) available to EIS observation. The details of each study such as line list, winodw size, exposure time etc. can be accessed online at [Hinode/EIS website|http://msslxr.mssl.ucl.ac.uk:8080/SolarB/] (MSSL), or alternatively using [EIS planning tool|http://sohowww.nascom.nasa.gov/solarsoft/hinode/eis/idl/planning/] which is distributed with [Solarsoft|http://www.mssl.ucl.ac.uk/surf/surfsolarsoft.html].     Checking EIS planning tool [user guides|http://msslxr.mssl.ucl.ac.uk:8080/SolarB/docs/EISPlanningToolGuide_Draft.pdf] here.
\\ \\ Alternatively you can use the [EIS planning tool|http://sohowww.nascom.nasa.gov/solarsoft/hinode/eis/idl/planning/], which is distributed within [Solarsoft|http://www.mssl.ucl.ac.uk/surf/surfsolarsoft.html].
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%%information
To run the EIS Planning Tool, first ensure that you've followed the [guidelines for its set-up|http://solarb.mssl.ucl.ac.uk/SolarB/PlanningTool_v3.0.jsp].
To make sure that you're pointing at the official studies database (OSDB), first type
\\
{{{print,fix_zdbase(/eis)}}}
\\
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 \\
{{{eis_xstudy}}}
\\
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.
\\
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* On Hinode/EIS website there two useful webpages especially:
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[Studies Available for EIS|http://msslxr.mssl.ucl.ac.uk:8080/SolarB/EisStudyList.jsp]\\
[{Image src='images/study/1227_d.png' link='http://msslxr.mssl.ucl.ac.uk:8080/SolarB/EisStudyList.jsp' width=180px height=180px}]%%
On the Hinode/EIS website there two especially relevant and useful webpages:
%%
\\
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      This page lists %%(color:green;)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).
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[Studies Available for EIS|http://solarb.mssl.ucl.ac.uk/SolarB/EisStudyList.jsp]\\
[{Image src='images/study/1227_d.png' link='http://solarb.mssl.ucl.ac.uk/SolarB/EisStudyList.jsp' width=180px height=180px}]
%%
      This page lists %%(color:green;)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).\\ \\
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Warning: EIS studies with IDs below #240 should not be used under the new Hinode data-volume regime!
Warning: EIS studies with IDs below #250 should not be used under the new Hinode data-volume regime!
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      __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.%%
      __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.\\ \\ \\
%%
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%%center
[EIS Study Use Summary|http://solarb.mssl.ucl.ac.uk/SolarB/studysummary.jsp]
[{Image src='images/study/1228_d.png' link='http://solarb.mssl.ucl.ac.uk/SolarB/studysummary.jsp' width=180px height=180px}]
%%
      This page is a summary of EIS %%(color:green;)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 (%%(color:green;)AR%%), Quiet Sun (%%(color:green;)QS%%), etc, and user can sort the summary by __study ID__ or __running times__.
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[EIS Study Use Summary|http://msslxr.mssl.ucl.ac.uk:8080/SolarB/studysummary.jsp]
[{Image src='images/study/1228_d.png' link='http://msslxr.mssl.ucl.ac.uk:8080/SolarB/studysummary.jsp' width=180px height=180px}]%%
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__EIS Daily Plan__ can be accessed from [DARTS website|http://www.darts.isas.ac.jp/pub/solar/solarb/eis/staging/eis_plan/], where you may find lots of %%(color:green;)text files%%. These files just list EIS daily activities along [EIS Observing Timeline|http://solar-b.nrl.navy.mil/cgi-bin/timeline4.cgi].\\ \\
%%
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      This page is a summary of EIS %%(color:green;)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.
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      __Tips__: user can view the summary based on different targets such as Active Region (%%(color:green;)AR%%), Quiet Sun (%%(color:green;)QS%%), etc, and user can sort the summary by __study ID__ or __running times__.
%%
\\
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* EIS daily plan can be reviewed from [DARTS website|http://www.darts.isas.ac.jp/pub/solar/solarb/eis/staging/eis_plan/]
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On [Hinode Daily Events Page|http://www.isas.jaxa.jp/home/solar/hinode_op/hinode_daily_events.php], 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):
[{Image src='images/study/1229_d.png'}]
This will give you a rough idea of the allocated EIS volume for a __three-day__ plan.
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* This [Hinode Daily Events Page|http://www.isas.jaxa.jp/home/solar/hinode_op/] can let you check the previous DR allocation (data volume on board?) for EIS. This will give you a rough idea about EIS study data volume.
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Examples of EIS studies under the low data-volume restriction:
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Examples of EIS typical studies under the low data-volume restriction:
%%
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%%center
__Active Region__
%%
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Objective:
--------------------
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Study summary
-------------------
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Raster Type: Scan
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ESTIMATED CADENCE: 28mins
ESTIMATED CADENCE: 28m16s
Compression: DPCM
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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
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%%information
For FITS files obtained using this study, please visit [Studies Available for EIS|http://solarb.mssl.ucl.ac.uk/SolarB/EisStudyList.jsp] page and click the button on the right for #241
%%
\\ \\
%%center
__Quite Sun__
%%
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20"x144" raster using 2" slit
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----------
--------------------
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Conditions Necessary to Run & Pointing:
---------------------------------------
Pointing:
--------------------
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Slit/slot: 2" slit
No of pointing positions: 9
Total spatial width: 20"
Pixels in solar-y: 144
Exposure time: 30 seconds
Cadence: 5 minutes 57 seconds
Data rate: 3.5 kbits/s
--------------------
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
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Compression: DPCM
WARNING:
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None
}}}
%%information
For FITS files obtained using this study, please visit [Studies Available for EIS|http://solarb.mssl.ucl.ac.uk/SolarB/EisStudyList.jsp] page and click the button on the right for #251
%%
\\ \\
%%center
__Flare__
%%
* 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
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%%information
For FITS files obtained using this study, please visit [Studies Available for EIS|http://solarb.mssl.ucl.ac.uk/SolarB/EisStudyList.jsp] page and click the button on the right for study #286
%%
%%
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----
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.
[{Image src='Study4LowDataVolume/20081103_slotmovie.gif' align='left' }]
\\
[{Image src='Study4LowDataVolume/20081028_slotmovie.gif' align='left' }]
--[Ignacio Ugarte-Urra|http://null], 17-Nov-2008
This page (revision-168) was last changed on 18-Apr-2021 19:22 by inetryconydotTop