13 December 2017 - Mission Day: 8048 - DOY: 347
OPERATIONS
 
Science Operations
 
 

DOY = day-of-the-year; FD = Flight date. Times are in UTC.

    Month Day Year DOY FD Time Event
    JAN 8 1997 8 404 14:48 OBT Frequency Adjustment
    JAN 14 1997 14 410 11:50 Momentum Management; -500/+500/+3000
    JAN 14 1997 14 410 16:39 Station Keeping # 3; ( X 1=16sec, X 2=3.6sec)
    JAN 14 1997 14 410 23:53 Fail-over to Gyro Mode
    JAN 15 1997 15 411 5:40 MDI Continuous Coverage, 3 days (until 018/21:50)
    JAN 21 1997 21 417 21:55 Fail-over to Gyro Mode
    JAN 30 1997 30 426 14:44 SEU threshold for fail-over to gyro: increased from 5 to 30
    FEB 1 1997 32 428 17:30 Tape Recorder Maintenance
    FEB 10 1997 41 437 17:00 Telemetry Submode 5 (new) replaces submode 1
    FEB 11 1997 42 438 17:01 Telemetry Submode 6 (new) tested for 4 hrs
    FEB 13 1997 44 440 7:55 MDI Continuous Coverage, 3 days (until 048/05:30)
    FEB 13 1997 44 440 19:41 SEU counter trace with COBS min/max channels 15,16
    FEB 15 1997 46 442 10:26 Thermal Reconfiguration (CEPAC/ESU hot)
    MAR 6 1997 65 461 9:08 Fail-over to Gyro Mode (2hrs in RMW)
    MAR 12 1997 71 467 12:00 MDI Continuous Coverage, 3 days (until 075/04:20)
    MAR 18 1997 77 473 17:50 Wheel 4 maint. & Momentum Mgmt: 2517/-3103/1615 (till 22:40)
    MAR 20 1997 79 475 12:02 Two Rolls for MDI&SWAN; 12 *30 deg.& 4*90 deg. (till 02:33)
    MAR 21 1997 80 476 5:37 HGA points to center of earth, not to station D16 from now on
    APR 2 1997 92 488 17:45 Tape Recorder Maintenance
    APR 10 1997 100 496 10:10 Fail-over to Gyro Mode (6.1 hrs in RMW)
    APR 11 1997 101 497 17:09 Mom. Mgmt. (-501/512/1589)
    APR 11 1997 101 497 - SK-4; Delta-V = -0.19 m/s, burn time 1.5 min, fuel used 0.21 kg; NM at 22:50
    APR 13 1997 103 499 11:05 MDI Continuous Coverage, 3 months (until 195/04:20)
    APR 23 1997 113 509 3:20 Spacecraft Receiver 1 lost lock
    APR 28 1997 118 514 19:51 Spacecraft Receiver 1 lock frequency found @ 2066.86 Mhz
    MAY 2 1997 122 518 14:59 OBT Freqency Adjustment
    MAY 19 1997 139 535 MEDOC Campaign #1, run for 3 weeks until June 6
    MAY 29 1997 149 545 9:28 Fail-over to Gyro Mode (3 hrs in RMW)
    JUN 1 1997 152 548 21:00 Tape Recorder Maintenance
    JUN 13 1997 164 560 SSU Staircase Filter changed from 30 to 60 in AOCS Software
    AUG 1 1997 213 609 16:00 Tape Recorder Maintenance
    AUG 1 1997 213 609 20:26 Fail-over to Gyro Mode (52 min in RMW)
    AUG 10 1997 222 618 12:45 MDI Continuous Coverage, 3 days (until 226/03:50)
    SEP 1 1997 244 640 15:33 Momentum Management preparing for roll; fuel 53 gr.;done 18:36
    SEP 2 1997 245 641 14:50 Fail-over to Gyro Mode (75 min in RMW)
    SEP 3 1997 246 642 8:32 Roll;dwell: @ 45 deg. 1.5 hrs, @ 90 deg. 12 hrs; done 247/00:09
    SEP 3 1997 246 642 16:06 Fail-over to Gyro Mode (114 min in RMW) during dwell @ 90 deg
    SEP 4 1997 247 643 1:00 Switch to Communications Back-up (TM low rate), recovered: 7:39
    SEP 4 1997 247 643 16:51 Wheel 4 Maintenance & Mom. Mgmt. (-500/500/1600); done 19:00
    SEP 4 1997 247 643 21:49 SK-05; Delta-V = -1.9 m/s, burn time 15.5 min, fuel used 2 kg; done 00:18
    SEP 11 1997 254 650 11:55 MDI Continuous Coverage, 3 days (until 258/05:20)
    SEP 25 1997 268 664 19:07 Test of new TM submode 3, until 24:00
    SEP 26 1997 268 664 15:10 Test of new TM submode 2, until 19:05
    OCT 7 1997 280 676 17:45 MDI Continuous Coverage, 3 days (until Oct.11, 04:35)
    OCT 8 1997 281 677 13:30 CDS processor swap (to remedy the watch dog triggering)
    OCT 13 1997 286 682 22:14 Fail-over to Gyro Mode (2 hrs in RMW)
    OCT 27 1997 300 696 - MEDOC Campaign #2, run for 2 weeks until Nov. 9, 1997
    OCT 30 1997 303 699 15:02 Fail-over to Gyro Mode (50 min in RMW)
    NOV 5 1997 309 705 12:40 MDI Continuous Coverage, until Nov. 9 at 06:00)
    NOV 6 1997 310 706 17:31 Fail-over to Gyro Mode (76 min in RMW) due to X9.4 flare in AR8100
    NOV 7 1997 311 707 0:51 Fail-over to Gyro Mode, 3 times (4 hrs, 41 min total in RMW)
    NOV 19 1997 323 719 14:40 ESR-2, by off-pointing (ACU power failure), recovered Nov.20 at 15:43
    NOV 20 1997 324 720 10:20 Switch to Communications Back-up (TM low rate), recovered:12:33
    NOV 29 1997 333 729 14:05 Wheel 4 Maint.,Mom. Mgmt. (3000/500/1800)
    NOV 29 1997 333 729 14:05 SK-06, Delta-V = +0.04 m/s, 15 sec burn, fuel 0.03 kg
    DEC 11 1997 345 741 13:20 MDI Continuous Coverage, (until Dec.15, 07:00)
    DEC 15 1997 349 745 14:45 OBT Freqency Adjustment
    DEC 19 1997 353 749 18:00 Mom. Mgmt. (3000/500/1800) & SK 07; done 20:38 (result of ESR)
    DEC 19 1997 353 749 20:38 SK-7; Delta-V = -0.4 m/s, 3 min burn, fuel 0.42 kg

Back to SOHO Events page

 
 

• European Site • US Site

 

Feedback & Comments: SOHO Webmaster

Last modification:

SOHO
and
SOHO
SOHO is a project of international cooperation between