SOHO Daily Meeting Minutes for Tuesday, 27 March 2001 ANNOUNCEMENTS ------------- * Network GITT security scan testing is tentatively scheduled for Wednesday 28 March from 14:30-16:30 UT. The alternative day is Wednesday 4 April from 14:00-15:20 UT. * Friday - Building 3: PMI contractors are scheduled to perform preventive maintenance on building 3-UPS-20 on March 30 from 9AM until 4:30PM. The UPS unit will be in bypass mode and the load will be on commercial power during this activity. No impact to operations is expected. 3-UPS-20 supports the SOHO, ACE, W/P and XTE missions. * Due to the Canberra strikes, all commanding should be done before Canberra passes start each evening. If there are any impacts to the instruments from these strikes, please tell the SOC. FOT REPORT ---------- Spacecraft Status: Nominal Spacecraft Anomalies: None Accomplished Activities: VIRGO Planned Activities: VIRGO, RSL Upcoming Operations: None Ground Anomalies: 085/2300 Work stoppage at SPC-40 resulted in the loss of scheduled DSN support from 2300 until 2345 and from 0100 until 0835 (total of 7 hrs and 50 min). Other: There was no data loss due to yesterday's stop work action at Canberra other than potential MDI high rate data. All VC0, VC1, and all magnetograms were recovered. Exact impacts to MDI's continuous campaign are TBD. SOLAR STATUS ------------ 03/26 DOY 085 - 03/27 DOY 086 PROTON FLARE EXPECTED IN 72 HOURS A new sunspot group growing rapidly near Region 9393A (N20 E25 at 27/0000) will combine with 9393A to form a very large sunspot complex in the next 24 hours. Proper motions within the new region (assigned 9393B by HelioSynoptics) are causing spot coalescence that will form large spots in the next 12 hours. The coordinates of 9393B are N16 E20. Within the larger, older 9393A are counter-clockwise spot motions involving its strong delta-configuration. At present these motions are relatively slow. Accelerated motions would signal an imminent Class-X proton flare at least the magnitude of the Bastille-Day 2000 event. The present region is much larger than the July 2000 sunspot group. All units vulnerable to effects of large proton events are advised of a high risk in the next few days, continuing through April 07. EIT daily On-Line Solar Status and observations: http://umbra.nascom.nasa.gov/eit/plan/log_form20010327.html LASCO daily On-Line Solar Status and observations: http://lasco-www.nrl.navy.mil/observations/2001/obs20010327.html AR Transient Events target: AR 9373 --------------------------- INSTRUMENT STATUS ----------------- CDS: Nominal. Map of active region belts SUMER: Nominal. Refspecs off the northwest limb. UVCS: Nominal. Coronal hole observations in the southwest at 1.7-2.4 Rsun and 14-hour synoptic. LASCO: Nominal. C2 and C3 synoptics. EIT: Nominal. Half resolution 195 Angstrom CME watch and synoptics. MDI: Nominal. Cropped full disk magnetograms and dopplergrams in best focus for continuous contact. TRACE: Nominal. Tracking AR 9393.