No. 19 - Cruise 1 Phase Continues
After the reset of GSEP bias pointing to 60 degrees a different profile in the torque evolution of two of the reaction wheels was observed in the dumped telemetry of the 27 June pass. In order to collect more data an extra pass on 29 June was scheduled to have an additional telemetry dump. Investigations are on-going to explain the observed behaviour, which has in any case no observable effect on the overall dynamics of the spacecraft (attitude and trajectory).
Four New Norcia ground station passes were skipped, as planned, on 25, 26, 28 and 30 June.
The table below shows a chronology of the main activities in the reporting period:
|
Mission Day |
Date |
DOY |
Main Activity |
|
116 |
25/26.06.04 |
177/178 |
Skipped ground contact |
|
117 |
26/27.06.04 |
178/179 |
Skipped ground contact |
|
118 |
27/28.06.04 |
179/180 |
Monitoring Pass |
|
119 |
28/29.06.04 |
180/181 |
Skipped ground contact |
|
120 |
29/30.06.04 |
181/182 |
Monitoring Pass |
|
121 |
30.06/01.07.04 |
182/183 |
Skipped ground contact |
|
122 |
01/02.07.04 |
183/184 |
Monitoring pass; uplink weekly MTL |
At the end of the last New Norcia pass in the reporting period (DOY 184) Rosetta was at 60.8 million kilometres from the Earth. The one-way signal travel time was 3 minutes 23 seconds.