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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0370

WHPI low latitude coronal holes observing campaign

plan term


@ @


 name : de Toma, Gibson @  e-mail : detoma[at]ucar.edu, sgibson[at]ucar.edu

contact person in HINODE team

 name : Savage, Watanabe @  e-mail : sabrina.savage[at]nasa.gov

 abstract of observational proposal
Main Objective: Observe recurrent coronal holes associated with geomagnetic activity

Scientific Justification: To coordinate with the first Whole Heliosphere and Planetary Interval (WHPI) observing campaign. WHPI is an international initiative to study the entire solar-heliospheric-planetary system during solar minimum with hundreds of participants worldwide. The first WHPI observing campaign is Mar 12 - Apr 8 2019, Carrington Rotatin 2215, and focuses on low-latitude coronal holes and recurrent high-speed solar wind streams. In particular, we target two long-lived coronal holes: a very large negative polarity coronal hole (our primary target) and a smaller positive polarity coronal hole (our secondary target).

Dates: The large coronal hole which is our primary target should be near central meridian on Mar 23-26. Best viewing time is expected on Mar 24-25. We are interested in observing both the central part of the coronal hole near disk center and at least one boundary of the coronal hole. One set of observations during two consecutive days is desired.

There is also a smaller coronal hole of positive polarity (our secondary target) that has been decreasing in size. It is expected to be near central meridian on Mar 15-16. We request to one set of observation (during a single day), if this hole will still be a good observing target in March.

 request to SOT
SOT/SP deep magnetogram mode, Stokes I Q U V, overlap with EIS FOV

 request to XRT
overlap with EIS FOV
Al/poly filter

 request to EIS
as many lines as possible, especially the iron lines, from FeIX to FeXIII
FOV 164" x164", desired FOV 256"x256" (if telemetry and time allow)
(recommended Study: DHB_007 # 544)

 other participating instruments
IRIS requests:
Very large sparse 96-step raster, 96x175, 30 second exposure
If time allows, add second try to mosaic east-west direction to cover as much as possible of coronale
3690112067 | Very large sparse 96-step raster 95x175 96s Deep x 30 Spatial x 2, S | 3015.65 |1178.39 | 0.49 | 31.4+/-0.1 | 3014+/-0 | 125.6+/-0.0 | 125.6+/-0.0 | 125.6+/-0.0 | 125.6+/-0.0

BBSO will also observe coronal holes

Time window: possibly observe during BBSO observing window

Target(s) of interest: coronal holes on-disk (target of opportunity)

Previous HOPs:
JOP 206 and JOP 203 were used to observe coronal holes during the previous solar minimum campaign in 2008

Additional remarks:
we are flexible with dates/observing times, this is a large coronal hole that will be visible for multiple days.

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