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. |
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