Study 000428:

ACRONYM: HPW021_VEL_120x512v2

*** RUN with JPEG85 ***

*** HPW021_VEL_120x512v2 is the same as HPW021_VEL_120x512v1
*** except for the exposure time, which has been shortened
*** to 45s to allow for running in between eclipses and SAA
*** periods.

TARGET:           Active Region
EXPOSURE TIME:    45s
RASTER:           Scanning
SLIT:             1"
FOV:              120"x512" (2" steps)
RASTER DURATION:  49m13s
VOLUME:           135 Mbits
RATE:             35 kbits/s
COMPRESSION:      JPEG95 *** RUN with JPEG85 ***     

This study is designed for velocity studies in and around active
regions during eclipse season. The primary features of this study are:
[1] full slit, [2] relatively deep exposures (45s), and [3] extensive
line list. The current thinking is that the Fe VIII 185 and Si VII 275
lines are the best lines for velocity calibration.

To accelerate the observing during eclipse season and to conserve
telemetry a 2" step is taken between exposures. The raster is also
relatively narrow (120" in 60 steps) so the duration will fit in
between eclipses.

Pointing:
---------

Adjust the pointing so that there is plenty of quiet Sun at the top OR
the bottom of the slit.

Instruction to planners:
------------------------

The planner should (not) put the feature of interest in the middle of
the slit. Using the bottom or top third of the slit will provide more quiet Sun
for velocity calibration.

Warning:
-------

2" steps are taken between exposures.