SXT REPORT FOR WEEK 18; 25 APRIL 1993 - 2 May 1993               

GENERAL STATUS


     It was another smooth but busy week of operations.  The solar
activity was low.  The largest flare was a C5.9 on the east limb on 
2 May 1993 around 00:00 UT.  There were only a few other minor C 
flares during hte week.

     Special off-points were performed to acquire important calibration
data for the Spartan campaign.  The necessary images were successfully
acquired.  At the end of the week a joint observing campaign with Hida,
Meudon, and Mees was started to try to observe emerging flux regions.  This
collaboration will continue during the next week.

     The weather was gloomy leading up to Golden Week, but the azaleas
around ISAS have been in full bloom.


PERSONNEL

     Hugh Hudson returned from a week in Hawaii.  Next week J. Lemen
and KD Leka will depart ISAS.  Loren Acton spent the week assessing the
SXT instrument health, and running calibration sequences.

SOLAR ACTIVITY

       The Sun remains fairly quiet, with only a few C flares during the
whole week.  The largest was a C5.9.  The coronal holes covered large
regions of the north and south poles and extend to near the equator.  On
Friday, we began a joint collaboration with Hida, Meudon, and Mees
(mentioned above).  The SXT was commanded, via ARS2 mode, to study
AR7493 through the weekend.  The daily plots from Hawaii are very valuable
for up-to-date planning.


SCIENCE PROGRESS

     There was no seminar this week because it was the beginning of
Golden Week.  Various authors continue to work on papers for PASJ and
also to prepare abstracts for the upcoming SPD. 

SXT OPERATIONS

     Loren Acton prepared eight SXT table loads during the past week.
The most important was to obtain stray light calibration images.  The
necessary data was acquired and Loren also determined that the CCD is
in very good health.  Dark spikes apparently are annealing at a fast
rate, so that we expect the instrument to be able to operate as it
currently is until the end of the Yohkoh mission.


                                                  James R. Lemen
                                                  5 May 1993