29 January 1999 David McKenzie
SXT CHIEF OBSERVER'S REPORT AND TABLE PLAN
CHIEF OBSERVER'S REPORT for Week 05 25-Jan-99 to 30-Jan-99
GENERAL
SXT continues to perform properly. Solar activity decreased during the week. The background dropped below the GOES C level; there were some very-short-duration flares, including an M flare on Monday.
SXT TECHNICAL
The SXT instrument is functioning nominally, no serious problems to report.
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/990129.html Index: http://www.solar.isas.ac.jp/sxt_co/index.htmlThis week's Nugget shows movies of a few kinds of interesting motion seen in a weak flare on 27-Jan-99. There's loop expansion, apparent flow, and also small moving condensations in a loop.
CAMPAIGNS
There were no formal joint observing campaigns. SOHO is temporarily offline again. See the general coordination page at:
http://sec.noaa.gov/solcoord/solcoord.html
PERSONNEL
Hugh Hudson was absent this week, but returned at the end of the week.
SEMINARS
There was no seminar this week.
DRAFT SXT TABLE PLAN, WEEK 06 (01-Feb-99 to 06-Feb-99)
This week begins a campaign with observers at Sac Peak, to examine flares. The SXT tables will be very similar to the standard tables, except we expect to use the ARS2 mode for most of this week, to follow bright active regions. The campaign is expected to last until 11-Feb-99.
Monday 01-FEB-99 08:12 2 990201 P2 ARS2 STD Tuesday 02-FEB-99 11:53 4 990202 P4 ARS2 DARKCAL Wednesday 03-FEB-99 08:43 2 990203 P2 ARS2 STD Thursday 04-FEB-99 07:17 2 990204 P2 ARS2 DIFF Friday 05-FEB-99 07:33 2 990205 P2 ARS2 STD Saturday 06-FEB-99 07:49 3 990206 P3 ARS2 STD
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.