HOP list   Monthly Events

HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0135

CORE: H-alpha Wing Observations

plan term


@ @


 name : Reardon, Tsuneta @  e-mail : kreardon[at]arcetri.astro.it

contact person in HINODE team

 name : Sekii @  e-mail : sekii[at]solar.mtk.nao.ac.jp

 abstract of observational proposal

 request to SOT
The primary instrument for the observations is the SOT/NFI.

Duration: The observations should last for a minimum of 30 minutes, up to a maximum of two hours.

Cadence: The goal for the cadence would be 10-15 seconds for images in both wings, with a maximum acceptable cadence of around 30 seconds. The cadence of the images is the highest priority observable.

Field-of-View: The field of view would be primarily the solar disk near to the solar limb. It would be desirable to include the solar limb in the edge of the field of view. An overall coverage as small as 100" x 100" would be fine, with larger fields acceptable.

Wavelengths: The wavelengths of the two wing positions should be approximately 0.6 A on either side of the nominal line core position. In order to ensure the proper positioning of these wing positions, a scan of the full line profile should be performed in order to determine the tuning of the filter relative to the true line center. This scan can be quickly analyszed to provide the optimal wavelength position of the two wing wavelengths. Some feedback concerning the wavelength drift of the NFI due to the day-night temperature fluctuations during eclipse season might be needed

Auxillary observations from SOT/BFI and XRT would be useful, but only if they do not impact the cadence achieved with the NFI or reduce the duration of the observations below the 30 minute limit.

SOT/BFI: Ca II H images, 30 second cadence
XRT: Ti-Poly images, 60 second cadence

 request to XRT
XRT: Ti-Poly images, 60 second cadence

 request to EIS

 other participating instruments

Time Period:
The observations can be run at any time. The required solar target is a  generally quiet region near the limb, which is available at any time. No specific coordination with ground-based observatories or other satellites are required. Coordination with TRACE might be desired if the intitial test observations prove useful.

Target of interest:
Quiet region at solar limb

HOP list   Monthly Events