28 March 1999 Nariaki Nitta CHIEF OBSERVER'S REPORT for Week 13 22-Mar-99 to 28-Mar-99 GENERAL Despite the constant presence of several small active regions, solar activity was decreasing through the week, and the GOES background level is at present barely at B. SXT continued to be in fine working order. We carried out offpoint observations toward the end of the week. SXT TECHNICAL No news. 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/990326.html Index: http://www.solar.isas.ac.jp/sxt_co/index.html The current Nugget discusses the relation of cusp structures seen in SXT images with CMEs observed by LASCO. CAMPAIGNS There were no formal campaigns this week. Please see the general coordination page at: http://sec.noaa.gov/solcoord/solcoord.html For SXT plans, finger campaign@isass0.solar.isas.ac.jp. PERSONNEL Alisdair Davey left after a restless week as system administrator. Now isassN machines are in much better shape. We hope he will come back soon. Nariaki Nitta arrived to be CO. SEMINARS None this week due to the ASJ spring meeting. SXT TABLE PLAN, WEEK 14 (28-Mar-99 to 3-Apr-99) There are no scheduled joint observing campaigns this week, but we will take some offpoint images, primarily in preparation for the future UVCS campaign. We will also collect offpoint terminators, so we ask SSOC tohbans to check with SXT CO which offpoint be used at every terminator opportunity. ________________________________#_______________________________ JST Day UT Start Time Pass Table ID Monday 29-MAR-99 06:11 2 990329 P2 ARS1 DIF Tuesday 30-MAR-99 09:52 4 990330 P4 ARS1 DAR Wednesday 31-MAR-99 03:18 1 990331 P1 ARS1 E-OFF Wednesday 31-MAR-99 04:59 2 990331 P2 ARS1 STD Thursday 1-APR-99 03:33 1 990401 P3 ARS1 W-OFF Thursday 1-APR-99 06:57 3 990401 P3 ARS1 STD Friday 2-APR-99 07:13 3 990402 P3 ARS1 STD Saturday 3-APR-99 07:28 4 990403 P4 ARS1 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. 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.