29 May, 2000 
                                                         N. V. Nitta


 
                   CHIEF OBSERVER'S REPORT for Week 22
                       22-May through 28-May-00


GENERAL 

The GOES background flux decreased roughly from C1 to B6 through the 
week, with a period of enhanced flare activity superimposed (24/25 May).
None of these flares reached the M2 level.  The X-ray Sun was
dominated by AR 9002/4 complex in the beginning, and then by AR 9017.


SXT TECHNICAL 

SXT was in fine working order.  There were no apparent problems this 
week.  Normal point was updated in the middle of the week.


SXT SCIENTIFIC

For Web material see

Current Week: http://isass1.solar.isas.ac.jp/sxt_co/000526.html
Index:        http://isass1.solar.isas.ac.jp/sxt_co/index.html

This week's nugget does not deal with interesting phenomena in recent
data, but discusses a very old topic of SXT temperature maps for flares
in comparison with HXT low-energy channel data. 

CAMPAIGNS 

There were no scheduled campaigns, but we tried high-cadence FFIs in the
hope of capturing the onset of CMEs.


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

There was no seminar this week.



                      SXT TABLE PLAN, WEEK 23 
                      (28-May-00 - 3-Jun-00)

Campaigns: La Palma campaign to observe big spots, but the pass allocation 
does not allow us to effectively participate in it.

________________________________#_______________________________

JST Day         UT Start Time      Pass   Table ID

Tuesday AM     29-MAY-00 21:38     4      000529 P4 ARS1 DARK*
Wednesday AM   30-MAY-00 14:59     1      000530 P1 ARS1 DIF* 
Wednesday AM   30-MAY-00 20:04     4      000530 P4 ARS1 STD*
Thursday AM    31-MAY-00 20:13     4      000531 P4 ARS1 STD*
Friday AM       1-JUN-00 20:22     4      000601 P4 ARS1 STD*
Saturday AM     2-JUN-00 18:48     4      000602 P4 ARS1 STD* 
Sunday AM       3-JUN-00 18:56     4      000603 P4 ARS1 STD* 

(* signifies that the UT and JST dates don't match on pass 1)

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.


Number of downlinks scheduled for this week

Week     Wallops   Santiago  Goldstone   Canberra     Madrid      Japan
  23          27          0          1          0          7         21