19 October 1998 Hugh Hudson

SXT CHIEF OBSERVER'S REPORT AND TABLE PLAN

CHIEF OBSERVER'S REPORT for Week 42 12-Oct-98 to 19-Oct-98

GENERAL

Yohkoh and SXT have both performed flawlessly this week. An M flare occurred over the weekend.

SXT TECHNICAL

The Wuelser patches to the Yohkoh pointing algorithms are holding up well. Normal pointing is a bit off (S/C too far E), so we will probably request a normal pointing update later in the week. As soon as the daylight passes at KSC resume, we intend to do a bakeout.

SXT SCIENCE

For Web material see

Current Week: http://www.solar.isas.ac.jp/sxt_co/SXTweekly.html
 Current Week: http://www.solar.isas.ac.jp/sxt_co/981019.html
 Index:        http://www.solar.isas.ac.jp/sxt_co/index.html

This week's "Science Nugget" shows off an example of the Neupert effect and links to an informal review paper on related Yohkoh observations.

CAMPAIGNS

There were no formal campaigns this week.

PERSONNEL

No changes.

SEMINARS

There was no seminar this week.

TABLE PLAN, WEEK 43 (19-Oct-98 -- 26-Oct-98)

We look forward to synchronizing again with SOHO. There seem to be no coordinated observations planned yet for this week.

JST Day UT Start Time Pass Table ID

Tuesday         20-Oct-98 15:00    4      981020 P4 ARS1 DARKCAL
 Wednesday       21-Oct-98 08:28    1      981021 P1 ARS1 DIF
 Thursday        22-Oct-98 10:26    2      981022 P2 ARS1 STD
 Friday          23-Oct-98 09:01    2      981023 P2 ARS1 STD
 Saturday        24-Oct-98 09:18    2      981024 P2 ARS1 STD

Note that we will try to work in two tables a day on some occasions, if we can synchronize better with TRACE or SOHO this way. In week 43 we have lost 11 out of 30 KSC passes, and no single day has the full five passes, so we are being heavily restricted in flexibility.

This plan may change during the week.

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, 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.