No. 73 - First Preparations for Mars Swing-by
15 Jan 2007 13:15Report for Period 30 December 2006 to 12 January 2007
The reporting period covers a period of 2 weeks with the first preparatory activities for the Mars Swing-by (MSB) phase.
During the reporting period the following activities have been conducted:
All activities have been conducted according to the plan without any problems. A double SEU (single event upset) has been detected by the SSMM in one of the memory modules, recovery activities are being conducted according to the procedure and without any impact on operations.
A total of 8 New Norcia (NNO) passes (4x8h commanding, 4x4h tracking) were taken during this period and 2 DDOR measurements were performed. DSN support consisted in 9x4h tracking passes and 2 DDOR measurements.
At the end of the reporting period (DOY 012) Rosetta was at 313.5 million km from Earth (2.09 AU) and the one-way signal travel time was 17 minutes 26 seconds. The distance to the Sun was 189.4 million km (1.26 AU).
Both activities have been conducted according to the plan and data have been made available to the PI teams for further analysis.
The MSB Phase formally started on 28 July 2006. The actual Mars swing-by will take place on 25 February 2007, followed by a Deep Space Manoeuvre in April 2007.
Preparation activities for the MSB have started on DOY 010 with the configuration of the spacecraft on-board software maintenance (OBSM) for this phase. They will continue in the coming weeks with the following plan:
The navigation campaign will enter now its most dense phase with several tracking passes per week and DDOR measurements, both with ESA and DSN stations.
The ground segment will now start the formal validation campaign for the Mars Swing-by scenario. This will include a set of scenarios simulations, review meetings, and navigation reports.