Study 000350:

ACRONYM: CHvel_240x400_sumer

Study summary:
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slit:		2"
S/C pointing:	polar coronal hole
window height:	400"
exposure time:	30s
# of pointing:	119
step size:	2"
duration:	1h 6m 55s
Data Volume:	80 Mbits
Data Rate:      20 kBits/s

Lines: He II 256, O V 193, Si VII 275.35, Fe X 184.5, Fe XI 188.23, 
Fe XII 195.12, Fe XIII 202.4, Fe XV 284.

Instruction to planner and pointing:
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Raster scan of a 240"x400" centered over the north limb
with the 2" slit, 30 s exposure and 2" steps (120 spectra),
to cover the required region in 1 h. 

This study is design for the observation of velocity fields at the base
of polar coronal holes. 
This study is for April 2009 Hinode/SUMER campaign.
Target will be the limb of a polar coronal hole. 
Because of technical requirements in implementing the SUMER
observing program, the target need to be the North polar coronal hole. 

Please repeat *FIVE* times at SUMER campaign.

Warning:
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None