19 May 1996
                                                         Serge Savy
                                                     
                                                      
                SXT CHIEF OBSERVER REPORT AND TABLE PLAN

SXT CHIEF OBSERVER'S REPORT for Week 20:   13-MAY-96 to 19-MAY-96

SOLAR ACTIVITY

AR7962 quietened down last week, producing only 4 B-class events, although
the region remained quite large in area.  All our PFI observations this
week targeted this region, the largest we have seen in recent months. 

SXT INSTRUMENT STATUS 

No significant SXT errors last week.  SXT has been operational with no
problems. 

CAMPAIGNS

Last week we started campaign with Jim Klimchuk, in collaboration with SoHO
CDS and SUMER, to measure filling factors in coronal loops. Three special
SXT tables were loaded, on three different days (13, 14, and 18 May) to
observe AR7962. The last table was used over the weekend, for coordinated
observations with CDS on Sunday 19 May.

SEMINARS

On Thursday, 16 May, there was a Yohkoh seminar given by Mukul Kundu.  The
title was "Solar Radio Astronomy at Metric Wavelengths: A Revisit by Yohkoh."


                       SXT TABLE PLAN FOR WEEK 21
                        (19-May-96 to 25-May-96)


Nariaki Nitta takes over as Chief Observer this week.  First part of this
week will be routine operations, but on Friday and Saturday we will have
another campaign with SoHO and VLA (Markus Aschwanden, PI).  The primary 
target will be a sunspot for which the height dependence of the coronal
magnetic field is measured from combined data.  In the absence of a sunspot
there are two alternative plans, so the tables to be uploaded are not 
finalized at this time.

The dark calibration table will be loaded on Tuesday, and the weekly
diffuser images included as part of a standard table on Wednesday. 

The provisional SXT Table Plan for the week is as follows:

    KSC Time (start) in JST     Pass          Table ID        
_____________(= UT + 9 hrs)______#_______________________________
 
Monday	    20-MAY-96 08:30      2         960519 P2 ARS1 STD+LONG
Tuesday     21-MAY-96 10:30      4         960520 P4 ARS1 DKCAL 
Wednesday   22-MAY-96 10:50      4         960521 P4 ARS1 STD+DIFFU      
Thursday    23-MAY-96 09:25      4         960522 P4 ARS2 STD VLA
Friday      24-MAY-96 09:45      4         960523 P4 ARS2 STD VLA
Saturday    25-MAY-96 08:20      4         960524 P4 ARS1 STD+LONG


*** Please note that this table plan may change ***


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. 

  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 use. 

  PREPARATION OF OGs: No new OGs need to be made this week.