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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0371

Coupling between photospheric and chromospheric processes during the evolution of Active Regions

plan term


@ @


 name : Lindner, Bello-Gonzalez, Schlichenmaier @  e-mail : lindner[at]leibniz-kis.de, nbello[at]leibniz-kis.de, schliche[at]leibniz-kis.de

contact person in HINODE team

 name : Tarbell, Shine @  e-mail : tarbell[at]lmsal.com, shine[at]lmsal.com

 abstract of observational proposal
Main Objective: Our aim is to observe atmospheric parameters above evolving Active Regions for multiple height levels in the photosphere as well as the chromosphere. (Coordinated observations with the Swedish 1-meter Solar Telescope)

Scientific Justification: Coupling mechanisms between photospheric and chromospheric layers at different heights above Active Regions are still not understood well. One of the reasons for that is that the height stratification of the magnetic field is not known precisely yet (see e.g., Balthasar (2018)). This project aims at analyzing the height dependence of the magnetic field above sunspots and pores and finding possible coupling mechanisms between the different layers during the evolution of sunspots and pores. This is also the topic of the PhD thesis that the applicant is working on. The aim of this observing campaign is to observe an Active Region, in which ideally a sunspot is under formation or decay. High resolution ground based data will be taken with the Swedish 1-meter Solar Telescope (SST) in the photospheric Fe I 617.3 nm line and the chromospheric Ca II 854.2 nm line. The IRIS team agreed to co-observe with the 1330 and 2800 nm wavelength region providing spectral information and imaging especially for the chromosphere. The spectropolarimetric data from Hinode would make calculations of photospheric magnetic field vector maps at an additional height level possible. With this data setup, magnetic fields and images are available for a great height range. Dynamic processes in Active Regions can therefore be analyzed and tracked with regard to the vertical coupling.

 request to SOT
SP is requested to observe in Normal map mode: 4.8 sec integration time with 6 cycles. Desired FOV:82hx 82h

 request to XRT

 request to EIS

 other participating instruments
IRIS requests:
IRIS observations have been accepted with the OBS-ID 3620256363

Swedish Solar Telescope

Dates: 16. April - 24. Apr 2019. This is the time period of the observing campaign at SST.

Time window: Mornings (8am - 1pm UT) are preferred because of seeing at the SST

Target(s) of interest: Active region. Preferably an Active Region where a sunspot is under evolution. In case no Active Region is on the disk, quiet-sun observations will be conducted as a backup. This would happen in cooperation with Anjali Kaithakkal and Catherine Fischer.

Previous HOPs: No prior HOP submissions

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