OPERATIONS
Science Operations
DOY = day-of-the-year; FD = Flight date. Times are in UTC.
| Month | Day | Year | DOY | FD | Time | Event |
| JAN | 09 | 2004 | 009 | 2961 | - | End of December keyhole period |
| JAN | 28 | 2004 | 028 | 2980 | 11:56 | MDI 5-Day Continuous Contact until February 2, 15:43 UT |
| JAN | 31 | 2004 | 031 | 2983 | 14:22 | First day of telemetry outage (2 minutes duration) from Madrid D66 station. RFI with MSG after it has been moved from 10 degrees west to 3.6 degrees west. |
| FEB | 11 | 2004 | 042 | 2994 | 13:12 | MDI 5-Day Continuous Contact until February 17, 12:27 |
| FEB | 22 | 2004 | 053 | 3005 | 14:22 | Last day of telemetry outage (2 minutes duration) from Madrid D66 station. RFI with MSG. |
| FEB | 23 | 2004 | 054 | 3006 | 16:00 | GSFC/JPL teleconference about receivers sweep times. Major conclusions: - DSN will do its best to perform only one sweep cycle to lock onto the receivers - SOHO project has agreed that it may take more than one cycle to lock since this longer duration should not harm the spacecraft receivers. |
| MAR | 16 | 2004 | 076 | 3028 | - | Beginning of March keyhole period |
| MAR | 30 | 2004 | 090 | 3042 | - | Station Keeping #41: jets 2,3,4; dV : 0.008567 m/s |
| MAR | 30 | 2004 | 090 | 3042 | - | Momentum Management 3 segments. Final speeds -1185/-520/2245 rpm |
| MAR | 30 | 2004 | 090 | 3042 | - | 180 degree Roll, satellite back to regular position. Final speeds: 1735/520/-1700 rpm |
| APR | 02 | 2004 | 093 | 3045 | - | VIRGO switched off by itself; turned back ON April 3, 2004. |
| APR | 08 | 2004 | 099 | 3051 | - | End of March keyhole period |
| APR | 21 | 2004 | 112 | 3064 | 5:37 | ESR-20 triggered by FSPAAD |
| APR | 22 | 2004 | 113 | 3065 | 7:27 | ESR-21 triggered by FSPAAD |
| APR | 22 | 2004 | 113 | 3065 | 16:12 | ESR-22 triggered by FSPAAD |
| APR | 23 | 2004 | 114 | 3066 | 23:37 | ESR-23 triggered by FPSS Sun Presence monitoring |
| APR | 27 | 2004 | 118 | 3070 | 17:05 | Station Keeping #42: jets 1,2,4,6; dV: 0.7349 m/s |
| APR | 27 | 2004 | 118 | 3070 | 19:20 | Momentum Management 3 segments. Final speeds: -1275/340/1205 rpm |
| MAY | 24 | 2004 | 145 | 3097 | 00:53 | MDI 5-Day Continuous until June 6 |
| JUN | 3 | 2004 | 155 | 3107 | 00:00 | MEDOC Campaign #13, until June 17 |
| JUN | 16 | 2004 | 168 | 3120 | - | Beginning of June keyhole period |
| JUN | 22 | 2004 | 174 | 3126 | - | SK-43: jets 2,3,4; dV: 0.476 m/s |
| JUN | 22 | 2004 | 174 | 3126 | - | 180 degree Roll, satellite in inverted position. Final speeds: 2250/--665/--1085 rpm |
| JUL | 3 | 2004 | 185 | 3137 | - | End of June keyhole period |
| JUL | 4 | 2004 | 186 | 3138 | - | MDI 60-Day Continuous until September 5 |
| SEP | 5 | 2004 | 249 | 3201 | 06:34 | Spacecraft transitioned to CRP mode due to SSU reset. Tracking windows of two stars became too close to each other leading the SSU software into an endless loop. |
| SEP | 11 | 2004 | 255 | 3207 | - | Beginning of September keyhole period |
| SEP | 21 | 2004 | 265 | 3217 | - | 180 degree Roll, satellite back to regular position. Final speeds: --1285/430/870 rpm |
| SEP | 21 | 2004 | 265 | 3217 | - | SK-44: jets 1,2,4,6; dV: 0.01516 m/s |
| SEP | 21 | 2004 | 265 | 3217 | - | Momentum Management 3 segments. Final speeds: --435/395/495 rpm |
| SEP | 21 | 2004 | 265 | 3217 | - | "Intermittent recording" patch upload |
| SEP | 22 | 2004 | 266 | 3218 | - | Patch "intermittent recording" test; subset #3 |
| SEP | 24 | 2004 | 268 | 3220 | - | Patch "intermittent recording" activation; subset #6 |
| SEP | 29 | 2004 | 273 | 3225 | - | SSR dump with "intermittent recording" data. Successful session |
| OCT | 08 | 2004 | 282 | 3234 | - | End of September keyhole period |
| OCT | 22 | 2004 | 296 | 3248 | - | First day of telemetry outage from Madrid D66 station. Suspected RFI with P92-3 USAF satellite. |
| NOV | 03 | 2004 | 308 | 3260 | - | MDI 5-Day Continuous until November 7 |
| NOV | 08 | 2004 | 313 | 3265 | - | MEDOC Campaign #14, until November 21 |
| NOV | 12 | 2004 | 317 | 3269 | - | Last day of telemetry outage from Madrid D66 station. Suspected RFI with P92-3 USAF satellite. RFI durations of a couple of minutes around 10:45 UT occurred on: Oct 22 & 24; Nov 1,2,3,6,7,10 & 12 |
| DEC | 02 | 2004 | 337 | 3289 | - | MDI 5-Day Continuous until December 5 |
| DEC | 08 | 2004 | 343 | 3295 | - | ESR-24 triggered by CSPAAD (false trigger) |
| DEC | 09 | 2004 | 344 | 3296 | - | --162.346 deg roll + Momentum Management 3 segments as part of the ESR-24 recovery. Final speeds: --600/3400/--1510 rpm |
| DEC | 12 | 2004 | 347 | 3299 | - | Beginning of December keyhole period |
| DEC | 21 | 2004 | 356 | 3308 | - | SK-45: jets 1,2,4,6; dV: 0.3358 m/s |
| DEC | 21 | 2004 | 356 | 3308 | - | Momentum Management 3 segments. Final speeds: 1165/455/--835 rpm |
| DEC | 21 | 2004 | 356 | 3308 | - | 180 deg roll, satellite in inverted position. Final speeds: --380/--455/1615 rpm |
| DEC | 30 | 2004 | 365 | 3317 | - | End of December keyhole period |
