Study 000391:

Acronym: JS_CH_400x256_V4

Coronal Hole study, 160s exposure time version.

Modified version of study #368 (120s to 160s exposure time to increase DN/pixel
and the number of pointing positions from 140 to 200).

Summary:
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2"slit scan, 200 pointing positions (FOV = 400"x256"), 160s exp. time.
DCPM compression is used to get good line profile.

TARGET: Coronal Hole
Duration: 9h 26m
Volume: 139 Mbits

Pointing:
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The target of this study is a polar coronal hole. EIS should be pointed
to include the boundary of the coronal hole and the limb. The purpose
is to obtain velocity maps of million degree plasma.

Instruction to planners:
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1. It would be better to run REGCAL 071 & 072 studies prior to run this study.

   *** Run REGCAL 071 & 072 only ONCE prior to multiple JS_CH run(s), per
       day. I.e do not run the regcals more than once per 24h ***

2. Ideally this study should run repeatedly (fill the time slot available).

WARNING:
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None