Study 000582:
ACRONYM: HOP81_new_study
This study is a modified version of the original used for the HOP 81 polar monitoring campaign. It was designed to perform a large FOV scan of the polar region using low temperature lines (log T < 6.2) coordinated with SOT/SP measurements of the magnetic field. The new version adds higher temperature lines from Fe XIII-XVI and high FIP element lines from S X and Ar XI, to allow tracking of abundances variations in the polar region during the solar cycle.
The scan dimensions are preserved from the original to keep continuity with the past (2006-2018). However, the 2" slit is now used to increase counts, and the FOV is scanned faster so that the study can be run between eclipses.
TARGET : Coronal hole
EXPOSURE TIME : 50s
RASTER : Scanning
SLIT : 2" (was 1")
STEP_SIZE : 4" (was 1")
FOV : 322"x384"
SPECTRAL WIND.: 24 (was 12)
DATA COMP. : DCPM
RASTER DURATON: 1h14m
DATA VOLUME : 140 Mbits (was 150 Mbits)
LINES : Fe VIII, Fe X, Fe XI, Fe XII, Fe XIII,
He II, O V, Mg VI, Mg VII, Si VII, Si X
Fe IX, Fe XIV, Fe XV, Fe XVI, S X, Ar XI
POINTING:
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Polar coronal hole with fixed pointing.
Make sure to cover SOT FOV and the solar limb.
INSTRUCTION TO PLANNERS:
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Start this study at the beginning of the SAA free period (roughly 10-15UT). Repeat the study several times avoiding Hinode eclipses. The later part may coincide with a short SAA.
Note: The plan for FSM is the same as that for DSM.
WARNING:
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Avoid SAAs as much as possible (SAA degrades data compression factors and mutilates the data) |
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