09 May 1998
                                                        David McKenzie 
  

              SXT CHIEF OBSERVER'S REPORT AND TABLE PLAN

                 CHIEF OBSERVER'S REPORT for Week 19 
                        03-May-98 to 10-May-98


SOLAR ACTIVITY

Solar activity was moderate-to-high, with two X flares and at least
eight M flares.  Most of these flares were known to be associated with
CMEs; a few proton events were recorded.

SXT INSTRUMENT STATUS

SXT has been working fine, though we experienced some problems with 
the network connection between KSC and SSOC. 

The Chief Observers feel that an update of the normal pointing is in order. 
We request an OP+OG for Tuesday, plus an ROG #32 (decimal).

SXT SCIENCE 

For Web material see

Current Week: http://www.solar.isas.ac.jp/sxt_co/SXTweekly.html
Index:        http://www.solar.isas.ac.jp/sxt_co/index.html
This week's webpage displays ejecta and loop-filling from the M flare of
03-may-98.

CAMPAIGNS

This week SXT took part in two Joint Observing Programs (JOPs).  
We made images to support JOP 082 ("Magnetic Flux Disappearance in
Cancelling Bipoles", Karen Harvey coordinating) and JOP 059 ("High Cadence
Activity Studies and the Heating of Coronal Loops", Robert Walsh
coordinating).

PERSONNEL

No personnel changes this week.

SEMINARS

No seminar this week.



                   SXT TABLE PLAN FOR WEEK 98_20
                      (11-May-98 - 17-May-98)

SXT Chief Observer: McKenzie 

There are two Joint Observing Programs (JOPs) running this week.
Both are interested in temporal changes in the corona, and hope to 
use high-cadence observations.

Note that this plan is subject to change, some tables in the plan
may be replaced by special JOP tables.  The Chief Observer will try
to keep everyone informed of changes/updates.
________________________________#_______________________________

JST Day     	UT Start Time      Pass    Table ID

Monday night   	11-May-98 14:49     1      980511 P1 ARS1 STD    
Wednesday 	12-May-98 16:49     3      980512 P3 ARS2 DARK+J59  
Thursday   	13-May-98 17:07     3      980513 P3 ARS0 JOP 080  
Thursday    	13-May-98 18:50     4      980513 P4 ARS1 STD 
Friday		14-May-98 15:42     3      980514 P3 ARS1 STD+DIFF  
Friday night 	15-May-98 12:34     1      980515 P1 ARS2 STD+J59 
Saturday night 	16-May-98 12:52     2      980516 P2 ARS1 STD


Continuing requests:

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 & 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). 

KSC Tohbans: In general flare mode supersedes table upload, ie 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.