CHIEF OBSERVER'S REPORT for Week 52
 
                        18-Dec-00 through 24-Dec-00

                                TAKEDA A. 

GENERAL 

Solar activity is low for these few weeks. No M-class flare was reported
for this week, although the GOES background was a little above the C-level
on the avarage.

SXT TECHNICAL 

No serious problem found this week.
On 18-Dec, we had three runs of the flare-mode, which correspond to the 
following GOES events; C7.0, C3.2, and C2.7, respectively.
The latter two events were not during the SAA passage of S/C, and thus
rather weak than getting into the flare-mode, which, at present, set to be 
triggered by the flux larger than 255cnt/s on WBS/SXS. 
We do not yet figure out this anomaly clearly, but SXT has resumed its 
proper flare observation after 19-Dec.

SXT SCIENTIFIC

For Web material see the science nuggets:

Current Week: http://isass1.solar.isas.ac.jp/sxt_co/001222.html
Index:        http://isass1.solar.isas.ac.jp/sxt_co/index.html

This week's nugget(by NVN) gives a good review of the gorgeous splurge of 
X-flares, we met with in the late november.

CAMPAIGNS 

A Max Millennium campaign, "Eruptive Flares Associated with Sigmoids" is
now in progress. We are on alert for fat sigmoids.  

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

G. Slater left on 23th and will come back in mid-January.
 
SEMINARS

No seminar this week.

TELEMETRY DOWNLINKS

Week  Wallops Santiago Goldstone Canberra Madrid NASA Japan
  52       28        8         4        0     11   51    36
  53       20        7         6        0      6   39    27


                     SXT TABLE PLAN, WEEK 53
                     (25-Dec-00 to 30-Dec-00)

There are no formal campaigns scheduled for this week, although we
are on the alert for sigmoid active regions. Two tables uploads
are planned on Wednesday's night. 

________________________________#_______________________________

JST Day         UT Start Time      Pass   Table ID

Tuesday AM     25-DEC-00 15:08     3      001225 P3 ARS1 DIFF
Tuesday PM     26-DEC-00 11:48     2      001226 P2 ARS1 STD
Wednesday PM   27-DEC-00 10:11     1      001227 P1 ARS1 DARK
Thursday AM    27-DEC-00 15:16     4      001227 P4 ARS1 STD
Thursday PM    28-DEC-00 11:56     3      001228 P3 ARS1 STD
Friday PM      29-DEC-00 10:17     2      001229 P2 ARS1 OVERYEAR 

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.