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In the first week of the reporting period the spacecraft was monitored only with a single New Norcia pass, during which a HGA pattern calibration test was carried out. In the second week all New Norcia passes (except for one) and one DSN pass were taken, to allow the start of the preparatory activities for the upcoming Commissioning Phase part 2, which is due to start on 6 September.

In the reporting period the spacecraft was monitored weekly, mainly to dump the telemetry stored on-board. During the last weekly pass, the LGA threshold test first attempted on 1 June 2004 was repeated successfully (see report No. 15).

Report for week 30 July to 6 August 2004

In the reporting period the spacecraft was monitored daily (with the exception of two passes) to complete the upload and verification of version 7 of the on-board software. Following the monitoring of the previous week the go ahead for finalization of v7 installation was given on 2 August. From now on the Rosetta spacecraft will be fully controlled via the new software.

Report for week 23 July to 30 July 2004

In the reporting period the spacecraft was monitored daily to ensure the correct behaviour of its avionics systems after the upload and activation of the new version 7 of the on-board software.

In the reporting period the uplink and activation of the new avionics on-board software (version 7) has been carried out, probably the most critical operation since launch. The work of this week successfully concluded a four-months period of intense system testing at ESOC, which had followed the development and test activities carried out at Industry since autumn 2003.

The reporting period covers the sixth week of Cruise 1. The spacecraft is configured for cruise and the payload is off. The main activities of this week covered the preparation for uplink and activation of the Avionics On-Board Software version 7.

Report for week 2 July to 9 July 2004

The reporting period covers the fifth week of Cruise 1. The spacecraft is configured for cruise and the payload is off.

Report for week 25 June to 2 July 2004

The reporting period covers the fourth week of Cruise 1, in which for the first time no test, maintenance or characterization activity was planned. The spacecraft is configured for quiet cruise and the payload is off.

The reporting period covers the third week of Cruise 1. The main activity was a first check for availability of the MGA-S antenna, in order to select it in case of Survival Mode.

In the second week of the Cruise 1 phase, several activities on the AOCS (Attitude and Orbit Control System) were executed.

Report for week 4 to 11 June

The first part of the Rosetta Commissioning Phase was successfully completed in the reporting period. The Cruise 1 Phase formally started on 7 June 2004 and will last until the start of the second and last commissioning slot in September/October 2004. The last payload activities in this phase, the repetition of OSIRIS measurements (slot 2b), were successfully completed.

The reporting period covered part of the transition from the payload commissioning activities to the start of the Cruise 1 phase, which will take place next week. The ALICE PAT test was finally and, after two cancellations due to different reasons in the past weeks, successfully carried out. The first pass of the extra slot requested by OSIRIS to repeat some of the measurements taken in slot 2 was also successfully carried out.

Payload commissioning activities continued in the reporting period, with the execution of the second ROSINA commissioning slot. The DFMS and RTOF instruments were tested, with high voltage operations and the final successful acquisition of spectra from DFMS. RTOF commissioning will be completed in the autumn commissioning slot as planned. SREM was also activated for 24 hours to check stability of the instrument temperature.

The main activities in the reporting period were the touch-up deep-space manoeuvre, the second Comet Linear observation and the completion of the Lander commissioning slot 3.

Report for week 7 to 14 May 2004

The most important activity in the reporting period was the execution of the first deep-space manoeuvre on 10 May. This was the most critical spacecraft activity executed since LEOP, involving a change in velocity (delta-V) of 152.8 ms^-1, achieved through a continuous burn of the four on-board axial thrusters for a duration of about 3.5 hours. The manoeuvre was executed successfully and the performance of the spacecraft was excellent, with an estimated inaccuracy of about 0.05%.

Report for week 30 April to 7 May

Payload commissioning activities continued in the reporting period. For the first time a scientific activity was executed: the observation of comet Linear. Four remote sensing instruments, MIRO, ALICE, VIRTIS and OSIRIS took measurements and images during this special pointing operation.

Payload commissioning activities continued in the reporting period. For the first time the spacecraft was rotated such that the payload could point towards the Earth. This gave MIRO and VIRTIS the opportunity to take calibration measurements using the Earth as a target.

Report for week 16 to 23 April 2004

Payload commissioning activities continued in the reporting period. The main activity was the completion of the second ALICE commissioning slot. In support of the ALICE high voltage operations the ROSINA COPS pressure monitor was active for most of the time.

Payload commissioning activities continued in the reporting period. The main activity was the second commissioning slot of the Lander, mainly dedicated to Lander payload operations. All activities were successfully completed, with the exception of a few procedures that will have to be repeated in Lander slot 3 after off-line analysis of the available results.

Report for week 3 to 9 April 2004

Payload commissioning activities have reached an important milestone in the reporting period: all scientific instruments have been activated at least once since the beginning of the mission.