http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=35671

European Space Agency
Rosetta
Software Verification Complete

09 Aug 2004

Report for week 30 July to 6 August 2004

In the reporting period the spacecraft was monitored daily (with the exception of two passes) to complete the upload and verification of version 7 of the on-board software. Following the monitoring of the previous week the go ahead for finalization of v7 installation was given on 2 August. From now on the Rosetta spacecraft will be fully controlled via the new software.

Final tests carried out in this period were:

1 August

• Further Navigation Cameras test, including slews with the cameras in tracking mode
• Redundant RTU Payload Core and the redundant Solar Array Drive electronics

On 2 and 3 August the loaded command files for processors 2 and 3 patching were executed. Memory dumps and comparisons with the ground software images confirmed the correct patching of the redundant processors with the new on-board avionics software v7.

The OSIRIS instrument was activated manually during the New Norcia pass on 4 August, to support data generation and retrieval tests which were carried out on the following day remotely from the PI?s home institute.

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

Mission Date DOY Main Activity
Day
151 30/31.07.04 212/213 Skipped pass
152 31.07/01.08.04 213/214 Skipped pass
153 01/02.08.04 214/215 NAVCAM test dump, redundancy switching
154 02/03.08.04 215/216 Patch software v7 on PM2 and PM3
155 03/04.08.04 216/217 Verify v7 patch by memory dumps
156 04/05.08.04 217/218 Monitoring pass, activate OSIRIS
157 05/06.08.04 218/219 Monitoring pass, test OSIRIS data flow, uplink MTL
At the end of the last New Norcia pass in the reporting period (DOY 219) Rosetta was at 73.6 million Km from the Earth. The one-way signal travel time was 4 min 5 sec.

Please note that the next two issues of this report will occur on a bi-weekly basis, that is on 20 August and on 3 September. After that the normal weekly periodicity will re-start.