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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 you can use [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].
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].
\\
\\
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=>  Checking EIS planning tool [user guides|http://msslxr.mssl.ucl.ac.uk:8080/SolarB/docs/EISPlanningToolGuide_Draft.pdf].
%%  
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:
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-yynn-F0F0E7-C0C0C0
__EIS Weekly Observing Summary__ is a guidance of EIS science observation, decided by EIS team. EIS planner will make observing plan based on this guidance for the incoming week. \\ \\ It is very usful if you'd like to check whether your proposal is on the schedule and when your observation will be run by EIS (roughly).
%%information
=>  You can click to access [EIS weekly observing summary|http://msslxr.mssl.ucl.ac.uk:8080/eiswiki/Wiki.jsp?page=EISWeeklyObservingSummary]
%%  
%%
%%roundedCorners-nnyy-dcdcdc-C0C0C0
 
%%
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This will give you a roughly idea of EIS daily data volume.
This will give you a rough idea of the allocated EIS volume for a __three-day__ plan.
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Examples of EIS studies under the low data-volume restriction:
Examples of EIS typical studies under the low data-volume restriction:
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%%roundedCorners-nnyy-F0F0E7-C0C0C0
%%roundedCorners-nnnn-F0F0E7-C0C0C0
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PRY_footpoints_lite (Study 000241){{{
dsfds}}}
%%
* PRY_footpoints_lite (Study 000241)
{{{
Study 000241:
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ACRONYM: PRY_footpoints_lite
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\\
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.
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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
}}}
%%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
%%
%%
%%roundedCorners-nnyy-99CCFF-C0C0C0
 
%%
----
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