SOHO Daily Meeting Minutes for Tuesday, 27 March 2001
ANNOUNCEMENTS
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* 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
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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
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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
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INSTRUMENT STATUS
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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.