August 7, 1999 
                                                             H. Hudson 
 
                   CHIEF OBSERVER'S REPORT for Week 32
                         2-Aug-99 to 8-Aug-99

GENERAL

Activity remained high. The major sigmoid region in the S mentioned
last week blew into the year's first X-class flare! According to the
known distribution function for flare occurrence, based on the number
of M-class flares in the first 7 months of 1999, there should have
been 13-26 X-class flares (there were none). So we are learning 
something. See this week's nugget for further comments.

SXT TECHNICAL 

Nothing out of the ordinary.

SXT SCIENCE

We are going to try to do a "near real time" eclipse page, with
a movie only 1.5 hours old, in time for the 10:00 p.m. news in
Tokyo. Wish us luck! Initial location, at least, will be
http://isass1.solar.isas.ac.jp/sxt_co/eclipse/qrt.html but
it will also be linked from the eclipse prediction nugget, 990716.html

For Web material see

Current Week: http://isass1.solar.isas.ac.jp/sxt_co/SXTweekly.html
Current Week: http://isass1.solar.isas.ac.jp/sxt_co/990806.html
Index:        http://isass1.solar.isas.ac.jp/sxt_co/index.html

This week's nugget deals, of course, with the X-class flare of Aug. 2.
Its impulsive phase was not observed by SXT so we could not tell much
about its eruptivity, but it was a compact flare rather than a giant
arcade.

CAMPAIGNS

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 changes. 

SEMINARS

There were no seminars this week.


                       SXT TABLE PLAN, WEEK 33 
                         (9-Aug to 14-Aug-99)

There will be a set of eclipses on August 11. We will try to catch
them in "movie mode", quarter-resolution FFIs (table ECL1), and with 
PFIs set to a bright feature in the track of the limb (table ECL2).

________________________________#_______________________________

JST Day         UT Start Time      Pass   Table ID

Monday           9-AUG-99 19:36    5      990809 P5 ARS1 DARK*
Tuesday         10-AUG-99 16:24    3      990810 P3 ARS1 ECL1*
Wednesday       11-AUG-99 11:32    1      990811 P1 ARS0 ECL2
Wednesday       11-AUG-99 13:13    2      990811 P2 ARS1 DIFF 
Thursday        12-AUG-99 11:46    1      990812 P1 ARS1 STD
Friday          13-AUG-99 17:07    4      990813 P4 ARS1 STD*
Saturday        14-AUG-99 12:13    2      990814 P2 ARS1 STD 

As previously, the (*) in a table name means that the UT date and
the JST date don't match.

The (*) in a table name means that the UT date and the JST date 
don't match. 

This plan is subject to change.

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, 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.