CHIEF OBSERVER'S REPORT for Week 31 24-Jul-00 through 30-Jul-00 H. Hudson GENERAL Activity ceased pretty completely, but there were six M-class flares towards the beginning of the interval. SXT TECHNICAL SXT worked fine without apparent problems this week. The CCD bakeout has now been deferred for another two weeks to allow daylight contacts again. SXT SCIENTIFIC For Web material see the science nuggets: Current Week: http://isass1.solar.isas.ac.jp/sxt_co/000728.html Index: http://isass1.solar.isas.ac.jp/sxt_co/index.html "Flare, II, halo" Discusses the M8 event of July 25, which made a nice type II burst recorded at Culgoora and Hiraiso, along with a halo CME. SXT again did not see clear evidence of wave motion in spite of the improved AEC function in the low-resolution flare sequence tables. This was an example of an extremely impulsive event yet still with a CME. p.s. The HXT spectrum was hard, but not hard enough for Sawa-san. CAMPAIGNS The SERTS rocket flight, plus CDS and VLA observations also oriented to DEM studies. The rocket went off OK and (I think) probably observed the end of a C-class flare; Yohkoh did not get exactly simultaneous data and suffered from some saturation in the SXT images because of the flare. For SXT plans, see: http://isass1.solar.isas.ac.jp/sxt_co/sxt_future.html For SXT completed campaigns, see: http://isass1.solar.isas.ac.jp/sxt_co/sxt_catalog.html PERSONNEL No changes. SEMINARS None. TELEMETRY DOWNLINKS Week Wallops Goldstone Canberra Madrid NASA ISAS 30 32 1 1 4 38 34 31 26 5 1 3 35 31 SXT TABLE PLAN, WEEK 32 (31-Jul through 5-Aug-00) Orbit night precludes baking-out, so we will wait for a few weeks and try again. There are no campaigns scheduled in this interval. ________________________________#_______________________________ JST Day UT Start Time Pass Table ID Tuesday AM 31-JUL-00 15:09 4 000731 P4 ARS1 STD* Wednesday AM 1-AUG-00 15:17 4 000801 P4 ARS1 DIFF* Wednesday PM 2-AUG-00 12:00 3 000802 P3 ARS1 DARK Thursday PM 3-AUG-00 08:44 1 000803 P1 ARS1 STD Friday PM 4-AUG-00 12:15 4 000804 P4 ARS1 STD Saturday PM 5-AUG-00 12:23 4 000805 P4 ARS1 STD * The ID reflects the UT date of the first pass. This table plan is subject to change. Continuing requests: KSC & SSOC Tohbans: If any KSC passes are likely to be cancelled (for example due to heavy snowfall) 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, 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.