SXT Status Report
                      2 June 1997 to 16 June 1997
                             (Weeks 23-24)
                      H. Hudson, S. Savy, M. Weber


SUMMARY

SXT continued to operate well. Solar activity was moderate but not zero.

SOLAR ACTIVITY

The Sun is not so lopsided as it was in 1996, judging from the last rotation.
There are currently only new-cycle regions on the disk. During the reporting
period there were only B-classs flares, and not too many of them, but of
course the movie looks as beautiful as ever. The largest sunspot area reported
was 160 millionths.

SXT INSTRUMENT STATUS

SXT continues to perform well technically. On the database side, a memorable
event occurred: thanks to the diligence of Seko_san and Slater_san, the
final reformatting came up to within one week of real time. This is no
doubt a record!

SXT CALIBRATION ACTIVITIES

We continued to try to sharpen up the Yohkoh pointing in an effort to
improve the stray-light database.

PASS CONFLICTS

Week 22: Twelve passes were cancelled (nine for Akebono, three for Haruka). 
Week 23: Six passes were cancelled for Haruka 

CAMPAIGNS

There were no formal campaigns during this interval, not counting
the end of the Pic du Midi campaign. Weber filed a report concluding
the Yohkoh scheduling during the campaign interval, after finding 
software that generates the report directly. This software will be
run again when the final reformatted data are available.
     SXT also followed SOHO target pointing where possible, especially
the CDS field of view.
     Over the weekend of 14-15 June, we are trying out Q-resolution only
(FFI's) to see if the factor-of-four improvement in cadence will help with
Moreton wave detection. If this looks OK, we elaborate on this scheme to
emphasize Q resolution, but to obtain enough H resolution full-Sun images
for other purposes.

For Yohkoh target planning, the SXT weekly observing plan is available on
the Web at
        http://www.space.lockheed.com/SXT/html2/First_Light.html
or with
        "finger campaign@isass0.solar.isas.ac.jp | more"        .

See http://sohowww.nascom.nasa.gov/operations/targets/today"
for SoHO target planning.

VISITORS AND PERSONNEL

No personnel changes among SXT personnel; Lee McDonald (BCS) returned
to the U.K. but will be back soon.

SEMINARS

There were several Yohkoh seminars:

(June  5) L. McDonald (MSSL): "Non-thermal energy deposition in the
  chromosphere and the accompanying soft X-ray flare emission"
(June  5) H. Hudson (SPRC): "Coronal Mass Ejections, part II: AGU report"
(June 12) S. Savy (LMPARL): "Chromospheric eVAPORATION observed with Yohkoh"

It was a good fortnight for the Neupert effect.

TOHBANS

Tohbans for Week 22:

    SSOC :  Noguchi, Koyama
    KSC  :  Hashizume, Hanaoka
    SXT_CO: Weber 
    SXT_SW: Slater 

Tohbans for Week 23:

    SSOC :  Nakajima, Shimizu
    KSC  :  Hanaoka, Magara
    SXT_CO: Hudson 
    SXT_SW: Slater