23 October 1995
                                                      
                                                      S. K. Savy
                                                      J. R. Lemen

                SXT CHIEF OBSERVER REPORT AND TABLE PLAN


SXT CHIEF OBSERVER'S REPORT for Week 42:   15-OCT-95 to 21-Oct-95

The highlights this week: the Sun remained active, with an M-Class flare
observed with SXT on 20 Oct; we practiced more SXT table loads for the
eclipse; and began the Chromospheric Activity and Coronal Loops Campaign
with Brigitte Schmieder (Meudon). For this campaign we took high
resolution images of AR7912 as it moved towards the West limb. 


SOLAR ACTIVITY

The Sun was quite active this week, with an M2 class flare on the 20 Oct
that was well-observed by Yohkoh, and many B-class flares.  Most of the
interesting activity, including several X-ray Jets associated with small
flares, occurred in AR7912.  The Mees magnetograms showed a complex field
geometry evolving into a simple bipolar structure at the end of the week. 


SXT INSTRUMENT STATUS

The eclipse table test on 19 Oct revealed over-exposure of the right side
(approximately one third) of the CCD in all the images during a 17 arcmin West
offpoint. This is caused by stray light from the recent entrance filter
failure. It limits our view of the deep corona off the West limb to
within approximately 8 arcmin of the limb. The 18 arcminute East offpoint
observations also showed some additional stray light, but the effect is
much weaker.


CAMPAIGNS

This week we started the Chromospheric Activity and Coronal Loops campaign
with Brigitte Schmieder (Meudon). AR7912 was the focus of our attention
for the campaign, and we were rewarded by some interesting activity.


SEMINARS

The seminar this week was by Bernie Jackson (UCSD/STElab) on "Active Region
Imprints on IPS Measurements". H. Watanabe gave some related
comments.
  
 

                       SXT TABLE PLAN FOR WEEK 43
                        (22-Oct-95 to 28-OCT-95)


This week we will continue with the Chromospheric Activity and Coronal
Loops campaign which ends on 25 October.  On Tuesday we will interrupt the
campaign to load tables for the solar eclipse observations that day. 
Please plan to do off-point terminator observations at the appropriate
off-point angles for the eclipse observations. 


The SXT Table Plan for the week is as follows:

    KSC Time (start) in JST     Pass    Table ID        Comments
_____________(= UT + 9 hrs)______#_______________________________


Monday     23-Oct-95  14:04	 3	951023 P3 ARS2 STD+LONG
Tuesday    24-Oct-95  09:16	 1	951024 P1 ARS0 ECLIPSE1
Tuesday    24-Oct-95  16:06      5      951024 P5 ARS2 ECLIPSE2
Wednesday  25-Oct-95  11:17      3      951025 P3 ARS2 STD+LONG
Thursday   26-Oct-95  09:54      3      951026 P3 ARS1 DKCAL
Friday     27-Oct-95  10:13      3      951027 P3 ARS1 STD+LONG
Saturday   28-Oct-95  10:32      2      951028 P2 ARS1 STD+LONG

/// KSC and SSOC TOHBAN PLEASE NOTE:      \\\
\\\ THIS TABLE PLAN IS SUBJECT TO CHANGE. ///


Terminator-Offpointing:
   We plan to do offpoint observations regularly.  So offpoint 
terminator images have to be taken as before.  We continue to ask 
SSOC tohbans to manually insert the off-point OG's for the terminators 
in the OP tables. SSOC TOHBAN, please fax the preliminary OP list to 
D-tou when it contains a terminator so that the Chief Observer can 
suggest which OG's to be used.  


Dumping Patrol images:
   We request that KSC tohban continue to dump a patrol image each
time an SXT table is loaded to facilitate the study of optimizing
ARS parameters for an awfully quiet period.

Campaigns:

This week we continue the Chromospheric Activity and Coronal Loops campaign
which ends on 25 October.  The organizers are B.  Schmieder, P.  Mein, L. 
Roudier, and L.  Van Driel-Gesztelyi.  The SXT CO will choose the solar
target on a daily basis and will send the coordinates to France by e-mail
and to Tennerife by Fax (+34 22 32 91 40).  SXT will use AlMg and and Al
filters and 2x2 OG field of view and ARS2.  The relevant hours for the
ground-based observations are 06:00 to 16:00 UT. 

For the eclipse observations we will load one table on Pass 1 on Tuesday. 
If the table load fails we will load the table on Pass 2.  A second eclipse
table will be loaded on Pass 5.  The plan is take off-pointed and on-disc
quarter resolution FFI's with the AlMg filter, and 4x1 PFI's at both the
north and south poles to observe solar plumes.  The time cadence will be 32
seconds for the FFI's, 64 seconds for PFI's at each pole.