Asset Publisher

No. 17 - Cruise 1 Phase Activities

No. 17 - Cruise 1 Phase Activities

Report for week 11 to 18 June 2004In the second week of the Cruise 1 phase, several activities on the AOCS (Attitude and Orbit Control System) were executed.

These were mainly related to:

  • the setting of the "dust" parameters of the Star Trackers via an on-board software patch
  • the first activation of the Navigation Cameras to install software patches developed before launch,
  • and the initial AOCS periodic maintenance activities (cycling of IMPs, return to 3 reaction wheels control).

Given some unexpected results of the in-flight validation of the Star Tracker dust settings, at the end of the week it was decided to return to the original settings and perform some more investigations and tests on ground.

The second and third battery have been successfully conditioned (reduction of charge level), thus completing the reconditioning activity planned for the beginning of each cruise phase.

As planned, on 14 June the GSEP pointing bias has been reset to 50 degrees above +X. 

Two New Norcia ground station passes were skipped, as planned, on 11 and 12 June.

The table below shows a chronology of the main activities in the reporting period:

Mission Day

Date

DOY

Main Activity

102

11/12.06.04

163/164 Skipped ground contact!

103

12/13.06.04

164/165

Skipped ground contact!

104

13/14.06.04

165/166

Monitoring, complete Battery 2 discharge.

105

14/15.06.04

166/167

Apply dust settings to STR-B.
CAM SW Maintenance.
STR-B tracking performance tests.
Start Battery 3 discharge.
Reset GSEP attitude bias.

106

15/16.06.04

167/168

Apply dust settings to STR-A.
STR-A tracking performance tests.

107

16/17.06.04

168/169

IMP periodic maintenance.
Re-enable TCT lines 35/36.

108

17/18.06.04

169/170

Undo dust settings of both STRs.
Go to three wheels.
Complete battery 3 discharge.

At the end of the last New Norcia pass in the reporting period (DOY 170, 01:30) Rosetta was at 53.2 million kilometres from the Earth. The one-way signal travel time was 2 minutes 57 seconds.

Last Update: 1 September 2019
28-Sep-2020 19:56 UT

ShortUrl Portlet

Shortcut URL

https://sci.esa.int/s/890k5XW

Images And Videos

Related Publications

Related Links

See Also

Documentation

Further Readings