SXT REPORT FOR WEEK 35; 22 Aug 1993 - 28 Aug 1993               

GENERAL STATUS

     It was another smooth week of operations.  The solar activity was 
very low, hovering at the GOES B level for the entire week.  The weekly
off-points were done.  As Loren Acton reported last week, the instrument
is in very good health.

     The weather varied between hot and humid and wet as Typhoon 11 roared
through the Tokyo area.


     Today (31 Aug 1993) is the 2nd anniversary of the Yohkoh mission.  A 
celebration dinner has been planned at a restaurant in Yokohama's China Town.

PERSONNEL

     Loren Acton returned to Mont after spending three busy weeks as
chief observer.  He accomplished much in the way of various calibration 
tasks.  Samuel Freeland and James Lemen arrived this week to begin one 
month visits to ISAS.  Lemen will work with Hugh Hudson as joint Chief 
Observer for the next couple of weeks.  At the end of the week Keith Strong 
and Julie Saba also arrived in preparation for the Kofu Meeting next week.  
Many other visitors from the U.S. and elsewhere are expected to flood into 
ISAS next week.

SOLAR ACTIVITY

       The Sun was very quiet last week, remaining at GOES B level for
the entire week.  There is currently a large coronal hole in the
northern hemisphere which extends to the North solar pole.


SCIENCE PROGRESS

     Interesting science talks were given by T. Shimizu on his study of
transient brightenings in active regions, and by K. Shibata, on signatures
for magnetic reconnection in the Yohkoh data.  Many visitors are beginning
to arrive for the Kofu meeting, and are providing an opportunity for various
scientific discussions.  Greg Slater has been making more progress on the 
East/West synoptic map software.

SXT OPERATIONS

     The operations went smoothly last week, but we saw several occasions
when the SXT PFI was mis-pointed.  Upon further study it was discovered
that the mis-points occurred during times when the Yohkoh was transiting
the SAA.  Since the flux from the active regions has decreased so much,
the automatic region selection software is sometimes fooled by cosmic
rays, which are now competing in signal strength under certain circumstances.  
This is only a minor problem and the time of mis-pointing lasts no more than 
ten minutes, which is the interval between patrol images.


                                                  James R. Lemen
                                                  31 Aug 1993