26 May 1998 SOHO Daily Meeting Minutes Chairs: Joan Hollis (SOC)/ Frederic Auchere (SOL) Notes: Emily Zamkoff (MDI) DOY: 146 FOT BRIEFING ------------ Spacecraft Status: Nominal Spacecraft Anomalies: None Accomplished Activities: Day 142: RSL,VIRGO,NEW TRACKING STAR Day 143: RSL,VIRGO Day 144: RSL,VIRGO,NONCOHO Day 145 RSL,VIRGO Planned Activities: RSL,VIRGO Upcoming Operations: 5/31 TR MAINTENANCE/MEMORY DUMPS Ground Anomalies: 142/1546 TC Block Length Errors D61 13 Cmds retransmit 15 Min NRT Pause 142/1811 1 Min TM Dropout D61 Reason unknown. Recoverable 142/2010 TC Block Length Errors D16 7 Cmds retransmit 10 min NRT Pause 143/1326 NO D16 Pass. Station had failed power supply for beam Voltage Unable to bring carrier up. Antenna had to be stowed to fix. 2hrs 50 Min of scheduled contact lost. D66 1628-1816 No loss of TM or Magnetograms 144/0011 Unreliable Commanding at D46 Large fluctuations in AGC seen on RCVR 2. Unable to command S/C to record. Had D43 brought up, D/L only until D42 was available. Used D42 to go to record. 144/2055 TC Block Sequence Errors D16 14 Cmds retransmit. 15 Min NRT pause 144/2140 3 Hr TM Outage D16 SFG Failure Recoverable. Lasco Cmding interrupted 6 commands failed to reach S/C and had to be resent. TM restored at 145/0032. 145/0712 1 Min TM Dropout D66 SFG Hit Recoverable 145/1550 8 Min Commanding Delay D16 Resweeps for Ranging 145/1648 TNIF 2 Card on Prime String not Active SOLAR STATUS ------------ Sun was quiet this weekend. Monday at 03:05 was a CME from AR 8225 in SE seen by EIT. Two new regions coming over the limb in the north and the south. The region in the north has a nice sunspot (this is the target for the active region study). Prominence in NW. Streamer emerging slowly from NE. Pleiades and Hyades seen in LASCO C3. INSTRUMENT STATUS ----------------- CDS: Nominal. Weekend: coronal hole study. Today: active region study. SUMER: Off. UVCS: Nominal. Weekend: coronal hole study. Today: calibration exercises. LASCO: Nominal. Synoptic program. EIT: Nominal. CME watch in 195 all week. MDI: Nominal. Weekend: full disk mags and continuum images for coronal hole observations. Today: full disk resolution on upper half of the sun getting mags, velocity, and continuum images for the active region study. TRACE: Nominal. Weekend: coronal hole study. Today: recently switched to active region in north for the 2 week active region study.