CHIEF OBSERVER'S REPORT for Week 39
                        18-Sep-00 through 24-Sep-00

                           N. Nitta, A. Takeda


GENERAL 

Two huge regions dominated the solar disk -- AR 9166 (700 millionth),
and AR 9169 (2000 millionth), both of them could be seen by a naked eye. 

SXT TECHNICAL 

No problems.

SXT SCIENTIFIC

For Web material see the science nuggets:

Current Week: http://isass1.solar.isas.ac.jp/sxt_co/000922.html
Index:        http://isass1.solar.isas.ac.jp/sxt_co/index.html
The newest nugget shows data of a clear X pattern formed by X-ray
loops on 22-Jul-2000. 

CAMPAIGNS 

JOP 126 ended, and JOP 104 continued.

For SXT plans, see:

http://isass1.solar.isas.ac.jp/sxt_co/sxt_future.html

For SXT completed campaigns, see:

http://isass1.solar.isas.ac.jp/sxt_co/sxt_catalog.html

PERSONNEL

No change.

SEMINARS

Speaker: Robert Cameron (SUT), Title:  Quiet Sun Magnetic Fields.

TELEMETRY DOWNLINKS

Week     Wallops  Goldstone   Canberra     Madrid       NASA      Japan
  39          30          4          3          4         41         30
  40          33          6          1          5         45         30



                     SXT TABLE PLAN, WEEK 40
                      (25-Sep-00 to 1-Oct-00)
                              
We will continue the coordination with JOP104 to observe the onset of 
CMEs.  We probably follow their region, as announced around 14 UT,
to cover 19 UT (the same day) - 19 UT (the next day).  In that way,
there is a higher probability of observing a same region, given that
the Yohkoh passes are getting earlier.

________________________________#_______________________________

JST Day         UT Start Time      Pass   Table ID

Monday PM      25-Sep-00 06:43     1      000925 P1 ARS2 JOP104
Monday PM      25-Sep-00 11:49     4      000925 P4 ARS1 DIF104
Tuesday PM     26-SEP-00 11:55     4      000926 P4 ARS1 DARK
Wednesday PM   27-SEP-00 05:15     1      000927 P1 ARS2 JOP104
Thursday PM    28-SEP-00 05:21     1      000928 P1 ARS2 JOP104 
Friday PM      29-SEP-00 05:27     1      000929 P1 ARS2 JOP104 
Saturday PM    30-SEP-00 05:34     1      000930 P1 ARS2 JOP104
Saturday PM    30-SEP-00 10:40     4      000930 P4 ARS1 STD 


This table plan is subject to change. 

Continuing requests:

KSC & SSOC Tohbans: If any KSC passes are likely to be cancelled (for
example due to heavy snowfall) 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).

KSC Tohbans: In general flare mode supersedes table upload, i.e. 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.