No. 126 - Mission Operations Update
Mission operations have been conducted with support of the ESA New Norcia (NNO) and Cebreros (CEB) ground station, as well as the NASA DSN ground stations Goldstone (DSS-24), Canberra (DSS-45) and Madrid (DSS-54 & DSS-65).
| DOY | Date | Pass | Main Activity |
| 333 | 29/11/09 | CEB 2104 |
Monitoring pass |
| 335 | 01/12/09 | DSS-45 2106 |
Safeguard memory EEPROM refresh |
| 337 | 03/12/09 |
DSS-24 2108 |
Clean-up of solid state mass memory |
| 342 | 08/12/09 |
CEB 2113 |
Monitoring pass |
| 343 | 09/12/09 |
CEB 2114 |
The strobing flag is set to MGA (medium gain antenna) |
| 344 | 10/12/09 | DSS-54 2115 |
Monitoring pass |
| 346 | 12/12/09 | DSS-65 2117 |
Monitoring pass |
| 348 | 14/12/09 | NNO 2119 |
Monitoring pass |
| 350 | 16/12/09 |
NNO 2121 |
MIRO software patch test |
| 352 | 18/12/09 |
NNO 2123 |
Monitoring pass |
| 355 | 21/12/09 |
NNO 2126 |
Monitoring pass |
At the end of the reporting period (DoY 359) Rosetta was at 31.22 million km from Earth (0.2 AU) and the one-way signal travel time was 104 seconds. The distance to the Sun was 161.55 million km (1.07 AU).
Spacecraft
Payload
All instruments are now switched off. The Standard Radiation Environment Monitor (SREM) continues to run in the background.
ALICE
The instrument is currently OFF.
CONSERT
The instrument is currently OFF.
COSIMA
The instrument is currently OFF.
GIADA
The instrument is currently OFF.
MIDAS
The instrument is currently OFF.
MIRO
The instrument is currently OFF.
MIRO was operated on DoY 349 to test the updated software patch. The test was successful and the patch will now be coded in on-board control procedures (OBCPs) to limit the number of telecommands required at switch ON.
OSIRIS
The instrument is currently OFF.
ROSINA
The instrument is currently OFF.
RPC
The instrument is currently OFF.
RSI
The instrument is muted.
VIRTIS
The instrument is currently OFF.
LANDER Philae
The instrument is currently OFF.
SREM
Since DoY 251/2009 the accumulation settings are configured for active cruise mode.
Future Milestones
Rosetta is now cruising towards asteroid Lutetia. The encounter with the asteroid will take place in July 2010.
In January 2010 the spacecraft will undergo a major test activity when the Deep Space Hibernation Mode will be commissioned. This activity will require the support of several ground stations and will be the validation of the operating mode which the spacecraft will use for a period of about 2.5 years, from June 2011 till January 2014, during its passive cruise to comet 67P/Churyumov-Gerasimenko.
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Legal disclaimer
This report is based on the ESOC mission operations report, WOR #126. Please see the copyright section of the legal disclaimer (bottom of this page) for terms of use.