Study 000263:

ACRONYM: EL_WHI_CH_SMALL

This study is aimed at investigating the density, temperature and
abundance composition of equatorial coronal holes on the disk
by capitalizing on the number of ions included in the full EIS
range. This study is developed in response to the Whole Heliospheric
Interval campaign. The availability of many lines for accurate plasma
diagnostics is privileged at the expense of a wide field of view.

Target: equatorial coronal hole
Exposure time: 100s
Raster: scanning
Slit: 2"
Step size: 30
FOV: 60"x120"
Duration: 55 min.

POINTING:

equatorial coronal hole, with slit center more or less at the center of
the coronal hole. If coronal hole is small, it is OK to include surrounding
quiet Sun areas in the slit.

INSTRUCTIONS TO PLANNERS:

Run this study once a day as long as the equatorial hole is on the disk.
If possible, observe the same area in the hole each time.

WARNINGS

Avoid SAA.