July 16, 1999 
                                                   B. Handy, H. Hudson 
 
                 CHIEF OBSERVER'S REPORT for Week 29
                      12-Jun-99 to 18-Jul-99

GENERAL

Activity has been low this week, with the baseline GOES averages dropping 
to mid-B levels and only a handful of low- to mid-C class flares.  A large
region coming over the east limb keeps us optimistic for more big flares.
We observed the beginnings of a large CME blowing off the W limb on
15-July, later evident in LASCO C2 and C3 movies.


SXT TECHNICAL 

This week was by design a very quiet week since the mainframe was
down frequently for the first half of the week.  It was a pleasant
surprise, however, to find that the mainframe was back up and
operational on Wednesday, a day earlier than planned.  We have also been
receiving data from SIRIUS on a sporadic basis all week long, so we
were rarely in the dark as to Yohkoh's whereabouts for any length of
time.

The CCD bakeout is scheduled for next week.


SXT SCIENCE

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/990716.html
Index:        http://isass1.solar.isas.ac.jp/sxt_co/index.html

CAMPAIGNS

For more information on campaigns, see:

http://sec.noaa.gov/solcoord/solcoord.html

For SXT plans, see:

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

PERSONNEL

Greg Slater and Bob Bentley departed.

SEMINARS

There were no seminars this week.

                       SXT TABLE PLAN, WEEK 30
                        (11-Jul-99 to 17-Jul)

SXT will likely carry on standard operations this week until 
Thursday when we do the CCD bakeout.  No other coordination is 
currently planned.

________________________________#_______________________________

JST Day         UT Start Time      Pass   Table ID

Monday		19-Jul-99 00:34    2      990719 P2 ARS1 STANDARD
Tuesday		20-Jul-99 00:49    2      990720 P2 ARS1 DARK
Wednesday	21-Jul-99 02:46    3      990721 P3 ARS1 DIFFUSER
Thursday	21-Jul-99 21:54    1     *990722 P1 ARS1 SPECIAL
Friday		23-Jul-99 03:15    4      990723 P4 ARS1 STANDARD
Saturday	24-Jul-99 04:44    3      990724 P3 ARS1 STANDARD

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.