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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
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Study4LowDataVolume
Study4LowDataVolume

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[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
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%%center
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 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.
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!
\\ \\ 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].
\\
\\
%%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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%%
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On Hinode/EIS website there two useful webpages especially:
On the Hinode/EIS website there two especially relevant and useful webpages:
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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}]
[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}]
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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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[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}]
[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}]
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%%roundedCorners-yyyy-CCFFCC-C0C0C0
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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%%roundedCorners-nnyy-F0F0E7-C0C0C0
__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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%%roundedCorners-yyyy-CCFFCC-C0C0C0
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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%%roundedCorners-nnnn-F0F0E7-C0C0C0
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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%%
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Examples of EIS studies under the low data-volume restriction:
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%%center
Examples of EIS typical studies under the low data-volume restriction:
%%
\\
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%%
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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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--------------------
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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