From fletcher@sunspot.ssl.berkeley.edu Mon Jul 8 13:13:12 2002 Received: from sunspot.ssl.berkeley.edu (sunspot.ssl.berkeley.edu [128.32.147.25]) by ssl.berkeley.edu (8.11.6+Sun/8.9.3) with ESMTP id g68KD9T28942; Mon, 8 Jul 2002 13:13:09 -0700 (PDT) Received: from ssl.berkeley.edu (apollo.ssl.berkeley.edu [128.32.147.81]) by sunspot.ssl.berkeley.edu (8.11.6+Sun/8.11.6) with ESMTP id g68KD9L07391; Mon, 8 Jul 2002 13:13:09 -0700 (PDT) Received: from delsol.ssl.berkeley.edu (delsol [128.32.147.68]) by ssl.berkeley.edu (8.11.6+Sun/8.9.3) with ESMTP id g68KD7T28927; Mon, 8 Jul 2002 13:13:07 -0700 (PDT) Received: from localhost (fletcher@localhost) by delsol.ssl.berkeley.edu (8.11.6+Sun/8.11.6) with SMTP id g68KCu318188; Mon, 8 Jul 2002 13:12:56 -0700 (PDT) X-Authentication-Warning: delsol.ssl.berkeley.edu: fletcher owned process doing -bs Date: Mon, 8 Jul 2002 13:12:56 -0700 (PDT) From: Lyndsay Fletcher X-Sender: fletcher@delsol To: Manfred Bester cc: rlin@solen.ssl.berkeley.edu, Alex.Zehnder@psi.ch, Brian.R.Dennis.1@gsfc.nasa.gov, Martin.Fivian@psi.ch, Richard.Schwartz@gsfc.nasa.gov, cmj@ssl.berkeley.edu, cpbl@ssl.berkeley.edu, csillag@ssl.berkeley.edu, dsmith@ssl.berkeley.edu, dwc@ssl.berkeley.edu, prh@solen.ssl.berkeley.edu, dpankow@solen.ssl.berkeley.edu, fisher@ssl.berkeley.edu, gholland@ssl.berkeley.edu, ghurford@ssl.berkeley.edu, hhudson@ssl.berkeley.edu, ilan@ssl.berkeley.edu, jimm@ssl.berkeley.edu, jloran@ssl.berkeley.edu, kkane@vdn.com, krucker@ssl.berkeley.edu, lhyatt@uclink.berkeley.edu, ncraig@ssl.berkeley.edu, rlillis@ssl.berkeley.edu, rmillan@ssl.berkeley.edu, sharadK@ssl.berkeley.edu, markl@solen.ssl.berkeley.edu, teq@solen.ssl.berkeley.edu, rauch@solen.ssl.berkeley.edu, jfthors@solen.ssl.berkeley.edu, pjlehr@solen.ssl.berkeley.edu, nem@solen.ssl.berkeley.edu, ricks@solen.ssl.berkeley.edu, balciunaite@solen.ssl.berkeley.edu, schriste@solen.ssl.berkeley.edu, cepheid@solen.ssl.berkeley.edu, emily_r@solen.ssl.berkeley.edu Subject: RHESSI Tohban report, June 29 - July 7 2002 Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Content-Length: 2391 Status: R RHESSI tohban report for week starting Monday, June 29, 2002 Tohbans: H. Hudson (hhudson@ssl), L. Fletcher (fletcher@ssl) 1. Solar activity A rather fine X-class flare occurred, capping a sudden surge of activity from NOAA region 10017: 9230 + 0208 0213 0216 GO8 5 XRA 1-8A X1.5 4.1E-02 0017 9230 + 0209 0212 0220 LEA G RBR 8800 690 9230 + 0209 0210 0218 LEA G RBR 15400 820 9230 + 0210 0212 0218 LEA G RBR 4995 610 9230 0210 0213 0327 LEA 3 FLA S20W51 1B ERU 9230 + 0211 0212 0214 LEA G RBR 2695 160 9230 + 0214 //// 0216 LEA C RSP 025-094 III/1 It was characterized by puny meter-wave signatures and no major particle event. In this event RHESSI did two thick-shutter motions (pairs) and all five thin-shutter pairs. There was a softer second peak which may or may not have been detected above 100 keV in the front segments. We need to analyze the shutter behavior in this event, which is our best example (I think) with the new shutter thresholds. In addition, 7 M flares occurred from 10017 and possibly 10019 2-JUL-02 20:19 20:31 20:41 M1.5 3-JUL-02 19:41 19:45 19:49 M1.1 3-JUL-02 20:00 20:10 20:21 M5.3 4-JUL-02 07:27 07:34 07:39 M1.1 5-JUL-02 13:10 13:26 13:37 M3.2 6-JUL-02 03:28 03:42 03:55 M1.8 7-JUL-02 11:15 11:43 13:17 M1.0 2. Memory management Because of the sudden increase in solar activity, we suddenly went from low SSR content to very high SSR content, exceeding 80% at one point. To handle this we belatedly went back to A13 shutter mode on July 5, first Wallops pass (about 01:10). We also did two manual data deletions by moving the write pointer backwards: Deletion ~22:45 3-Jul to ~04:20 4-Jul Deletion 16:30 5-Jul to 03:00 6-Jul, worth about 19% of SSR Resetting the write pointer seems to be the safest and easiest way to delete data in emergencies like this. In principle we probably could have an automated system allowing a random-access forward motion of the read pointer to cover times deemed to be dull, in cases where changing the shutter status doesn't allow full control of the fill level. 3. Ground stations Weilheim started being scheduled again July 6, 22:17 4. Tohban for next week Lyndsay Fletcher (fletcher@ssl)