27 December 1997
                                                            Hugh Hudson 
  

              SXT CHIEF OBSERVER'S REPORT AND TABLE PLAN

                 CHIEF OBSERVER'S REPORT for Week 52
                       22-Dec-97 to 29-Dec-97


SOLAR ACTIVITY

Solar x-ray flux levels remained lowish through most of the week,
following some C flares at the beginning. By the end of the week
it was quiet enough to turn the "superlong" standard exposures back
on for a peek. These turned out to have covered a really nice 
interconnecting loop (structure?) development that's the subject
of this week's science nugget.

SXT INSTRUMENT STATUS

The performance level of the SXT remains high, and the week's
operations proceeded without difficulty.

SXT WEEKLY SUMMARY ON THE WEB

As with last week, this message and a science nugget will be on the
Web at ftp://isass0.solar.isas.ac.jp/pub/sxt_co/SXTweekly.html.


CAMPAIGNS

There were no official campaigns conducted this week. 


SEMINARS

We report that there were no seminars this week. 

  

                      SXT TABLE PLAN FOR WEEK 1 
                       (28-Dec-97 to 4-jan-98)

SXT Chief Observer: Hudson

Yohkoh is basically shut down for the long holiday as usual. No
table uploads are planned until Jan. 4.


JST Day     UT Start Time      Pass    Table ID
________________________________#_______________________________

Sunday      4-JAN-98 04:50      3      980104 P3 ARS1 DARKCAL

Note that this plan is subject to change.

Year-end note: Yohkoh will conduct observations at a reduced level,
with about two data dumps per day, until Jan. 4. This means about
10 hours per day of medium-rate data (10" pixels). Happy New Year!


Continuing requests:

SSOC Tohban: On the weekly visible diagram, please mark the official 5
passes first and then cross out those passes that will be given to other
satellites.  That way we can keep the numbering straight in the Yohkoh
software system.

SSOC Tohban: SXT operations do not currently include terminator off- 
pointing. It is unnecessary this week to ask the SXT Chief Observer
for terminator off-pointing information.

KSC & SSOC Tohbans: If any KSC passes are likely to be cancelled (for
example due to a typhoon) or an SXT table cannot be uploaded for some
reason, please telephone and e-mail the Chief Observer immediately.