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 |
