3 January 1999 
                                                              Hugh Hudson 


              SXT CHIEF OBSERVER'S REPORT AND TABLE PLAN

                CHIEF OBSERVER'S REPORT for Week 53/01
                        28-Dec-98 to 4-Jan-99

GENERAL

SXT continued to perform properly until the last KSC contact Dec. 30.
Solar activity remained at a high background level during the holidays,
but somehow avoided making X-class flares.  The dominant active region,
NOAA 8421, is being followed by TRACE and by us automatically.  We hope
Yohkoh reappears from its holiday in good shape.

SXT TECHNICAL

The SXT instrument is functioning nominally so far as we know.

SXT SCIENCE

For Web material see

Current Week: http://www.solar.isas.ac.jp/sxt_co/SXTweekly.html
Current Week: http://www.solar.isas.ac.jp/sxt_co/990101.html
Index:        http://www.solar.isas.ac.jp/sxt_co/index.html

This week's nugget is very simple. It just shows a coronal microflare
and discusses interpretations. We will resume major discoveries on Jan. 8.

CAMPAIGNS

There were no formal joint observing campaigns. SOHO, alas, is off
again. TRACE is following AR8421 as are we. See the general
coordination page at:

http://sec.noaa.gov/solcoord/solcoord.html

PERSONNEL

No changes. David McKenzie expected on the 6th.

SEMINARS

No seminars this week.





                   DRAFT SXT TABLE PLAN, WEEK 02
                      (4-Jan-99 - 9-Jan-99)


No coordinated observations are currently planned. We will just try
to get our calibrations done after welcoming Yohkoh back. 

Note please that a NORMAL POINT update will probably be necessary
on Wednesday, Jan. 6.

________________________________#_______________________________

JST Day         UT Start Time      Pass    Table ID

Tuesday          6-JAN-99 00:53    3      990105 P3 DARKCAL 
Wednesday        6-JAN-99 20:02    1      990106 P1 ARS1 DIFF
Wednesday        6-JAN-99 23:27    3      990106 P3 ARS1 STD 
Thursday         7-JAN-99 20:18    2      990107 P2 ARS1 STD
Friday           8-JAN-99 20:34    2      990108 P2 ARS1 STD


Continuing requests:

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.
(sxt_co@isass0.solar.isas.ac.jp, copy to sxt_st@flare2.solar.isas.ac.jp).

SSOC Tohban: On the weekly visible diagram, please mark the official
five 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 Tohbans: In general flare mode supersedes table upload, ie if a
flare is in progress please do not upload a new table, and contact the
chief observer. Normally it is OK to go ahead with the planned table
without change on the next pass, if it is available. Chief observers
should keep an eye on this.