11 March 1996
                                                        Nariaki Nitta


                SXT CHIEF OBSERVER REPORT AND TABLE PLAN

SXT CHIEF OBSERVER'S REPORT for Week 10:   04-Mar-96 to 10-Mar-96


SOLAR ACTIVITY

The solar activity continued to be very low, with no flares reported
and only hints of active regions. 

SXT INSTRUMENT STATUS

SXT was operational, but there were several problems with SXTSPT in
the upload confirmation function. Hara_san and Fujitsu are looking 
into this and will participate in real-time operations on Monday,
11-Mar.


CAMPAIGNS

A joint observing campaign with SoHO (their first!) took place on 7-Mar.
It was their JOP_039, study of polar plumes. From the Yohkoh point of view
it was a re-play of the Koutchmy-Hara campaign excercise from last year,
except this time with most of the SoHO capability available for a much
fuller characterization of the plume origins. The SXT setup was tested 
twice, along with an offpoint 18' S in an unsuccessful attempt to avoid
the thin Al pinhole. The final observation appeared to go successfully from
the Yohkoh side, with no offpoint and 2x1 OR observations in AlMg, Mg, and
occasional Al12 peeks. We are eager to reduce the data along the lines
of Kevin Reardon's careful work from the Koutchmy-Hara campaign, and hope 
this small field of view still allowed us to see a bright point or a jet
or two.

SEMINARS

There were three seminars this week:

Mar. 6:  H. Koshiishi (Nobeyama SRO) talked about his software improvements
for Nobeyama 17 GHz observations, which appear to promise a factor of 10
improvement in background fluctuation level.

Mar. 6: N. Gopalswamy presented Nobeyama and Yohkoh data on what appears
to have been a complete "3-part" CME event, with mass about 2 x10^14 gm.

Mar. 7: G. Haerendel (joint seminar and ISAS colloquium) discussed his 
ideas for multiple current fibers as the origin of flare energy. This 
picture is strikingly different from the CSHKP model that has played such
an important role in the interpretation of Yohkoh flare observations.



                       SXT TABLE PLAN FOR WEEK 11
                        (11-Mar-96 to 17-Mar-96)

No official campaign is scheduled for this week, and we are having
trouble with operating software (SXTSPT). Thus there will probably
be minimal table activity. At present the plan only includes the
routine dark cal and diffuser tables. Do finger campaign@isass0 to
see the current plans for future campaigns.

On Tuesday we plan to do the weekly dark calibration, and on Wednesday
the diffuser table. Otherwise we will continue with ARS1.

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

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

Tuesday     12-Mar-96 18:49      3      960312 P3 ARS1 DKCAL
Wednesday   13-Mar-96 15:42      2      960313 P2 ARS1 STD+DIFF
Thursday    14-Mar-96 16:01      2      960314 P2 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.