Study 000400:

ACRONYM:  arm_raster_ar

This is context raster for HOP 156 studies. Line list is chosen such
that we can produce a density map also. Therefor, DPCM compression is chosen
to get good line profiles. This raster is part of the study # 174
arm_fastslot_waves.

TARGET        : Active region.
EXPOSURE TIME : 25s
RASTER TYPE   : Scanning
SLIT          : 2"
STEP_SIZE     : 2"
FOV           : 82"x400"
DATA COMP.    : DPCM
RASTER DURATON: 20m
DATA volume   : 61 Mbits  
LINES         : Fe X, XII, XIII, XV, He II, Mg VI, Si VII, Ca XVII

POINTING:
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Active region on disk showing many distinct loops. If the loops are
just off-limb they could also be considered.

INSTRUCTION TO PLANNERS:
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For HOP 156 the studies should be run in the following order.

* Run arm_raster_ar (context raster)
* Run arm_fastslot_v2 (slot sit'n'stare)
* Run High_cadence_AR_dens (slit sit'n'stare). This study should be
repeated 3 times at 3 different locations (loop top & foot point are must)
on a well defined loop within the slot.

WARNINGS:
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* Run preferably during SAA-free time period.