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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0394

South Polar Coronal Hole Observations during the On-orbit Ecipse

plan term


@ @


 name : Hara @  e-mail : hirohisa.hara[at]nao.ac.jp

contact person in HINODE team

 name : Hara @  e-mail : hirohisa.hara[at]nao.ac.jp

 abstract of observational proposal
This proposal aims to obtain the EUV spectra that are emitted from coronal plasmas within the high-speed solar wind stream. For the correction of the scattered light from brighter disk components, the occultation by the Moon during the Hinode on-orbit solar eclipse is used. The core science topic is the radial variation of nonthermal plasma motions in the high-speed solar wind stream.

Spacecraft pointing:
      2019 Dec 26:  (+100", -920") during 02:50-04:05, (-100", -920") during 05:40-06:50

 request to SOT
In case that the telemetry is available, the execution of SP polarimetric observations (I, Q, U, V) is desirable to diagnose the polar magnetic fields at the coronal base. Stronger average radial fields than those from HMI on SDO  have been reported. A scanning raster of wide field-of-view is prefereable.

 request to XRT
Full CCD synoptic observations of 4 x 4 binning (512 x 512 pixels) is requested during the eclipse to record the position of the Moon.
Cadence: 30 sec
Compression: JPEG50
Duration: about 30 min.
Observing Time:
      2019 Dec 26  03:30-04:00 UT & 06:15-06:45 UT

    (  2020 ### ##  HH:MM-HH:MM UT  ) for the future runs

 request to EIS
- Run the following EIS raster twice.
 EIS Study ID = 588 [ PCH_SNS_2x512]
 Study duration of a single run: ~29 min/run
 Type of observation: sit & stare sequence run
 Exposure duration: 45 sec
 Compression:  JPEG85

- Run the following EIS wide-slot study once at the same pointing to record the EIS FOV after the 2nd raster.
 EIS Study ID = 494 [ XRT_synop_AIA ]

- Time of raster run and EIS pointing target:
       2019 Dec 26  02:57-03:26 UT + 03:27-03:56 UT,  Pointing (X, Y) = ( +100", roughly -1150")
       2019 Dec 26  05:48-06:17 UT + 06:18-06:47 UT,  Pointing (X, Y) = ( -100", roughly -1150")

    (  2020 MMM DD   HH:MM-HH:MM UT ) for the future runs

 other participating instruments

Dec 4 2021 observation:
XRT would do a movie observation for the second eclipse transit.
EIS would run HOP 394 during the first and third transits.

It requires the spacecraft pointing and XRT support observations.
The EIS FOV needs to cross the solar limb and to slightly contain the disk component.

Publication: Hara, H. 2019, ApJ, 887, 122

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