SOT: Determination of the properties of families of solar granules and formation of the photospheric network
2007-08-29T10:46:45 to 2007-08-29T22:33:42
Science Goal: Determination of the properties of families of solar granules and formation of the photospheric network
Program: emerging flux, shutterless 6302 and CaH
Target: Disk Center
xcen=2 ycen=0
Instrument: SOT
HOP/JOP: 21
Description:
Daily Note and User Entry: EIS: Target of Opportunity observations of on-disk coronal hole. SOT: Support HOP 21 (granulation and network) andnbsp
2007/08/29 10UT - 2007/08/30 10UT XRT: CCD Bakeout Alignment offset program (2hr for N 945arcsec, 2hr for E -945arcsec).
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.
Scientific Objectives: 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.
Other Instruments: Pic du Midi CALAS
