No. 26 - Preparing for second part of Commissioning Phase
06 September 2004 08:39Report for fortnight 20 August to 3 September
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.
These activities included:
Finally on 2 and 3 September the first payload on-board software maintenance was executed with the ALICE instrument. Post-upload verification tests were carried out and confirmed the correct functioning of the new software.
The table below shows a chronology of the main activities in the reporting period:
Rosetta reached its maximum distance from Earth for this year, 76 million km, on 28 August. Now the distance is slowly decreasing with the spacecraft heading towards the first Earth flyby on 4 March 2005.
At the end of the last New Norcia pass in the reporting period (DOY 247) Rosetta was at 75.8 million km from the Earth. The one-way signal travel time was 4 minutes 12 seconds.