Study 000496:

ACRONYM: HPW021_VEL_120x512v3

*** RUN with JPEG85. This is now the default.  Lower levels of
*** compression lead to data loss. 

*** HPW021_VEL_120x512v3 is the same as HPW021_VEL_120x512v1 except
*** for the exposure time, which has been extended to 240s for higher
*** signal to noise in coronal holes.

TARGET:           Quiet Sun
EXPOSURE TIME:    240s
RASTER:           Scanning
SLIT:             1"
STEP:		  2"
FOV:              120"x512" 
RASTER DURATION:  4h13m58s
VOLUME:           84 Mbits
RATE:             5.5 kbits/s
COMPRESSION:      JPEG85 *** RUN with JPEG85 ***     

This study is designed for velocity studies in coronal holes. The
primary features of this study are: [1] full slit, [2] relatively deep
exposures (240s), 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.

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 (1" Slit).