CHIEF OBSERVER'S REPORT for Week 48
 
                        20-Nov-00 through 26-Nov-00

                            H. Hudson, A. Takeda


GENERAL 

Solar activity increased spectacularly this week. As of Monday
afternoon, the Sun had produced five X-class flares, all of them from
AR 9236 near disk center (but there was an M8 from AR9240, thus
confounding those who claim that two regions cannot make major flares
at the same time).  The X-class flares were all compact, impulsive, and
associated with halo CMEs. Yohkoh apparently has good coverage for all
but the first, and from that one an interesting and possibly new form
of dimming appeared in the before-and-after difference images.  This
region is now the target of the continuing MEOC campaign.

SXT TECHNICAL 

No new problems this week. Pointing and roll appeared to remain stable. 

SXT SCIENTIFIC

For Web material see the science nuggets:

Current Week: http://isass1.solar.isas.ac.jp/sxt_co/001124.html
Index:        http://isass1.solar.isas.ac.jp/sxt_co/index.html

This week's nugget describes the first of the X-flares, or at least
its dimming signature.

CAMPAIGNS 

The MEOC campaign, looking for EIT-type waves, will continue until 8-Dec.  
The ASP campaign of Shimizu, Kubo, and Lites ended 22-Nov.

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

H. Hudson departed for a week. G. Slater arrived, and we hope his new
computers will show up soon.

SEMINARS

H. Aurass (Potsdam):  "Electron beam injection in the corona - results
from comparative YOHKOH and radio data analysis"

TELEMETRY DOWNLINKS

Week  Wallops Santiago Goldstone Canberra Madrid NASA Japan
  48       26        0         9        0      0   35    26
  49       31        0         0        0      0   31    24


                     SXT TABLE PLAN, WEEK 49
                     (27-Nov-00 to 2-Dec-00)

The MEOC campaign continues this week. This means that we
continue the faster-cadence FFIs in hope of spotting a wave.
There are two table uploads planned for Tuesday.

________________________________#_______________________________

JST Day         UT Start Time      Pass   Table ID

Monday AM      27-NOV-00 02:43     2      001127 P2 ARS1 MEOC
Tuesday AM     27-NOV-00 23:26     1      001127 P1 ARS1 DARK*
Tuesday PM     28-NOV-00 04:30     4      001127 P4 ARS1 MEOC*
Wednesday AM   29-NOV-00 01:10     2      001128 P2 ARS1 DIFF*
Thursday AM    30-NOV-00 02:57     3      001129 P3 ARS1 MEOC*
Friday AM       1-DEC-00 01:19     3      001130 P3 ARS1 MEOC*
Saturday AM     1-DEC-00 23:42     2      001201 P2 ARS1 STD*

A '*' means that the UT date of pass 1 differs from the JST date
of the pass in question 

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.