The PFI's were set N of AR8146 as shown, using fixed pointing at the position predicted for 04:30 UT Jan. 31 (click on the image to enlarge it):
ORIGINAL COORDINATES : 29-JAN-98 21:23:11 ROI center (image coords): x = 292 y = 382 OR Coordinates : NS = 191 EW = 109 Heliographic Coordinates : N 19.7 W 7.3
ROTATED COORDINATES : 31-JAN-98 04:30:00 Rotated OR Coordinates : NS
= 190 EW = 80 Heliographic Coordinates : N 19.7 W 25.5
These are actual AlMg images (alternating between 1.88 s and 3.78 s
nominal exposure times) obtained by Yohkoh just after the flight,
covering the time range 04:41:27 to 04:47:39 UT;
These are the corresponding Al12 images, all at the limiting exposure of 7.55 sec, over the range 04:40:45 to 04:46:57 UT.
The preliminary heliographic coordinates of the center of these images are (N20.9, W20.7); the SXT images are 128x128 pixels and the pixel size is 2.455 arc sec.