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No. 20 - Ongoing activities

No. 20 - Ongoing activities

Report for week 2 July to 9 July 2004The reporting period covers the fifth week of Cruise 1. The spacecraft is configured for cruise and the payload is off.

Several activities were carried out in the area of AOCS and spacecraft dynamics: first a characterization test of the acquisition capability of the Star Tracker in "dust" setting at various spacecraft rates (3 & 4 July); then a change in the default GSEP biased Earth pointing attitude to achieve better communications geometry (visibility of LGA-F) on 5 July. Finally a long disturbance torques characterization test over the period 6 - 8 July, in which the spacecraft was slewed very slowly in the orientations it will have in the next three months to observe the effect on the reaction wheel load.

Four New Norcia ground station passes were skipped, as planned, on 2, 3, 6 and 7 July.

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

Mission Day

Date

DOY

Main Activity

123

02/03.07.04

184/185

Skipped ground contact

124

03/04.07.04

185/186

Skipped ground contact

125

04/05.07.04

186/187

Monitoring pass: Star Tracker dust characterisation

126

05/06.07.04

187/188

Monitoring pass: verify GSEP orientation change

127

06/07.07.04

188/189

Skipped ground contact

128

07/08.07.04

189/190

Skipped ground contact

129

08/09.07.04

190/191

Monitoring pass: Disturb. Torques characterisation

At the end of the last New Norcia pass in the reporting period (DOY 191) Rosetta was at 64.2 million km from the Earth. The one-way signal travel time was 3 minutes 34 seconds.

Last Update: 1 September 2019
29-Sep-2020 16:46 UT

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