SOHO Daily Meeting Minutes for Monday, 12 June 2000 Chaired by: L. Roberts (SOC) DOY: 164 ANNOUNCEMENTS ------------- * There will be NASCOM router maintenance between 17-18 UT today and tomorrow. This will effect the flow of telemetry to the ECS, and the ECS will not be able to send commands to the CMS. Therefore, instrument teams should re-arrange their commanding schedule around this. * Submode change from submode 6 to submode 5 at 19:30 UT today. FOT REPORT ---------- Spacecraft Status: Nominal Spacecraft Anomalies: 161/1336 ACU anomaly (TC timeout between words) received while making star 2 eligible. No impacts. 161/1435 COBS DMA failure. Failed to acquire one packet over one format. Accomplished Activities: 161: VIRGO, SWAN, RSL, Acquired new tracking star, mag = 7.50 162: VIRGO, Flight Software Maint. 163: VIRGO, SWAN Planned Activities: VIRGO, Acquire new tracking star, mag = 4.5 Submode switch (6 to 5) at ~1930 Upcoming Operations: None Ground Anomalies: 161/1910 Wayward command. Lost a single command triggering 5 COBS software anomalies. NRT paused 5 minutes while all 6 commands successfully retransmitted. 162/0450 D66 failed to establish an uplink as they were using an incorrect exciter frequency. Delayed commanding activities 33 minutes, and required 4 sweeps into spacecraft receiver #2. 162/0523 Commanding activites delayed on D66 as they had their command modulation set incorrectly. Delayed activites 11 minutes. 162/2326 Lock on both spacecraft receivers for 1 minute because D46 erroneously brought their carrier up during station pre-pass activites. SOLAR STATUS ------------ SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY SHOULD REMAIN AT A MODERATE LEVEL. REGIONS 9026 AND 9033 ARE CAPABLE OF M-CLASS EVENTS. THERE IS ALSO A POSSIBILITY OF A MAJOR FLARE FROM THESE REGIONS. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD SHOULD RANGE PRIMARILY BETWEEN UNSETTLED AND ACTIVE LEVELS ON 12 JUN WITH ISOLATED MINOR STORMING POSSIBLE. ABOUT MIDDAY ON 13 JUN, A DISTURBANCE IS EXPECTED TO BEGIN AS A RESULT OF THE FULL HALO EVENT MENTIONED ABOVE. GENERALLY ACTIVE TO MINOR STORM CONDITIONS ARE EXPECTED WITH PERIODS AT MAJOR STORM POSSIBLE. THE DISTURBANCE IS EXPECTED TO CONTINUE THROUGH THE FIRST HALF OF 14 JUN THEN SLOWLY ABATE. THERE IS A POSSIBILITY OF ANOTHER SOLAR PROTON EVENT AND PCA SHOULD REGIONS 9026 OR 9033 PRODUCE A MAJOR FLARE. ENERGETIC ELECTRON FLUXES AT GEO SHOULD REMAIN ENHANCED FOR THE NEXT SEVERAL DAYS. 06/09 DOY 161 - 06/12 DOY 164 EIT daily On-Line Solar Status and observations: http://umbra.nascom.nasa.gov/eit/plan/log_form20000612.html LASCO daily On-Line Solar Status and observations: http://lasco-www.nrl.navy.mil/observations/2000/obs20000612.html INSTRUMENT STATUS ----------------- CDS: Nominal. Today and Tuesday CDS will provide 12-hour support for the Ulysses observations. CDS will also observe several different sunspots regions as time allows. UVCS: Nominal. Today and Tuesday UVCS is supporting Ulysses observations at 1.6, 1.9 and 2.2 Rsun. UVCS will also do 4-hour mini-synoptics each day. LASCO: Nominal. C2 and C3 synoptics and continuing support of JOP112. EIT: Nominal. 195 Angstrom CME watch and synoptics. MDI: Nominal. Full disk magnetograms and dopplergrams. TRACE: Nominal. TRACE is supporting La Palma observations on AR 9026 this morning. They may decide to switch to AR9033, still to be determined.