No. 75 - Trajectory Correction Manoeuvre
12 February 2007 14:02Report for Period 27 January to 9 February 2007
The reporting period covers a period of 2 weeks characterised by 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 problems. The navigation campaign for the Mars swing-by is proceeding according to the plan with radiometric data acquired by ESA's ground station in New Norcia (NNO) and NASA's DSN stations (DSS).
At the end of the reporting period (DOY 040) Rosetta was at 317.2 million km from Earth (2.12 AU; one-way signal travel time was 17 minutes 38 seconds). The distance to the Sun was 206.8 million km (1.38 AU).
All the instruments have confirmed their go ahead for the MSB operations. The Lander team still has the possibility to update the execution time of their commands should the closest approach time shift by more than one minute with respect to the value predicted in November. The current deviation is in the order of a few seconds.
The Mars swing-by phase formally started on 28 July 2006. The actual swing-by will take place on 25 February 2007, followed by a Deep Space Manoeuvre in April 2007. Preparation activities for the Mars swing-by will continue in the coming weeks with the following plan:
The navigation campaign will continue its most dense phase with several tracking passes per week and DDOR measurements, both with ESA and DSN stations.
The ground segment validation campaign for the Mars swing-by scenario is nearing completion with only one simulation left to be performed. A successful readiness review meeting has been held with the mission management on 2 February.