Study 000314:

Acronym: HH_QS_EW_SCAN_01s

This study is intended to be run on the quiet sun in the equatorial 
region for measurements of the average Doppler velocity relative to 
the limb. Five spacecraft pointings are required to achieve the goal.    

TARGET: Quiet Sun (equatorial)
EXPOSURE TIME: 30 sec
RASTER: Scanning
SLIT: 1"
STEP SIZE: 45"
FOV: 540" x 512"
RASTER DURATION: 7m38s
COMPRESSION: JPEG (Q=90)

2) ****** Five fixed pointings are required *******

    No tracking of differential rotation by spacecraft. 
    (X,Y) = (850",0"), (450", 0"), (0",0"), (-450",0"), (-850",0") 
    Spacecraft pointing: west is first, east is last. 

3) Use/Instruction to planners
    Run this study 10 times at a single spacecraft pointing. 
    The total raster duration covers about 75 min. Each scanning  
    point has 10 data points in the temporal direction and the 
    line centroid position changing with time due to orbital 
    variation is obtained at each scanning point. 

    Each coarse raster overlaps the neighbouring rasters in the 
    east-west direction, so that the line centroid position will 
    be calibrated to that measured at the limb.

4) WARNING
   None