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HINODE Operation Plan (HOP)

accepted on

20-jun-07


 HOP No.

 HOP title

HOP 0021

Determination of the properties of families of solar granules and formation of the photospheric network

plan term

2007/08/29-2007/08/31

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proposer

 name : Th. Roudier, M. Rieutord, N. Meunier, J.M. Malherbe, G. Molodij @  e-mail : roudier[at]bigorre.bagn.obs-mip.fr

contact person in HINODE team

 name : T. Berger @  e-mail : berger[at]lmsal.com

 abstract of observational proposal
The main goal of our proposal is to study the families of granules and the photospheric network formation by these families during a long time sequence 24 to 48 hours if possible.
We also plan to observe at the same time (3 to 6 hours) from Pic du Midi over a large field of view (10fx10f) in  the G-band with our 4kx4k CMOS camera CALAS (http://ljr.bagn.obs-mip.fr/calas/index.html). The observed families will be compared with the families generated by our new simulation code of the solar granulation developed in our team. We plan also to improve a posteriori ground observation over a large field of view by using simultaneous G-band SOT observations free from atmospheric seeing.

 request to SOT
we are interested in observations at the disc center during 24 to 48h if possible, with a time step of 30 to 60 seconds in G-band, with a pixel of 0.16 arc, and if possible magnetograms,  blue and red continuum and at least CAII H line. Our estimation of 1 image/minute, which is the minimum time step we need, with a pixel of  0.16 arcsec  gives 107Mb/hour and 2.56Go/day.  This gives a rate of 237 kb/sec which seems compatible with the mean Hinode rate 300kb/sec.  In order to follow the evolution in time of the families properties during the solar cycle, we would be interested by one or two observations per year during the increasing phase of the cycle.
In addition in future proposal, it could be envisaged some observation at two or three latitudes to try to find connection between meridian flow and supergranulation.

 request to XRT
We are also interested, if the Hinode rate allows it, to get observations with EIS and XRT every 10 or 20 minutes of the same field of view. This will help to follow the hot corona (Al_Poly Filter) with XRT, during the formation of the photospheric network in the quiet Sun.

 request to EIS
We are also interested, if the Hinode rate allows it, to get observations with EIS and XRT every 10 or 20 minutes of the same field of view. This will help to follow the upper chromosphere (He 256 Å) and corona (FeXV  284 Å) with EIS during the formation of the photospheric network in the quiet Sun.

 other participating instruments
Pic du Midi CALAS

 remarks
long time sequence: 24 - 48 hr

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