No. 9 - Second ALICE Commissioning Slot
All activities were successfully executed, but some delays were accumulated due to the fact that the prime pyro firing to open the ALICE detector door did not work (DOY 108) and an investigation was conducted before the redundant pyro could be fired. This activity took place successfully on DOY 112 and the detector door confirmed open. As a result of the delay, the final ALICE Payload Aliveness Test, originally scheduled for this slot, was postponed to DOY 115. This does not have any impact on the rest of the commissioning schedule since the pass on DOY 115 was scheduled to be a passive telemetry dump pass.
On the subsystem side no special activity was performed. Close monitoring of the thermal environment continues, but the temperatures were very stable throughout the week, including in the new inertial pointing attitude required by ALICE.
The table below shows a chronology of the main activities in the reporting period:
|
Mission Day |
Date |
DOY |
Main Activity |
|
46 |
16/17.04.04 |
107/108 | ALICE commissioning slot 2 - pass 2 |
|
47 |
17/18.04.04 |
108/109 | ALICE commissioning slot 2 - pass 3 |
|
48 |
18/19.04.04 |
109/110 | ALICE commissioning slot 2 - pass 4 |
|
49 |
19/20.04.04 |
110/111 | ALICE commissioning slot 2 - pass 5 |
|
50 |
20/21.04.04 |
111/112 | ALICE commissioning slot 2 - pass 6 |
|
51 |
21/22.04.04 |
112/113 | ALICE commissioning slot 2 - pass 7 |
|
52 |
22/23.04.04 |
113/114 | ALICE commissioning slot 2 - pass 8 |
At the end of the last New Norcia pass in the reporting period (DOY 114, 02:40) Rosetta was at 20 million km from the Earth. The one-way signal travel time was 66 seconds.