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No. 2 - Ongoing LEOP Activities

No. 2 - Ongoing LEOP Activities

Report for period 9 November 15:30 to 10 November 15:30 UTC.Both the Venus Express spacecraft and ground segment continue to perform excellently. The highlight of this period was the successful planning and testing of the Trajectory Correction Manoeuvre (TCM-0).

The Venus Express Launch and Early Orbit (LEOP) operations continue to run very smoothly with good support from the ESA and NASA DSN ground stations.

Pass 2 Activities
Pass 2 activities encompassed loading of the On-Board Control Procedures (OBCPs), loading of the Service 12 and the dump of the Safe Guard Memory (SGM). The planned Reaction Wheels off-loading was not required. All foreseen Pass 2 activities were already completed about two hours after hand-over from Team A to Team B. The remainder pass activities were quiescent, in view of a well performing spacecraft and ground segment.

Pass 3 Activities
Activities started with the preparation for testing the Trajectory Correction Manoeuvre (TCM-0). Given the slight over-performance from Soyuz-Fregat, the TCM-0 was conducted in the direction of Earth for minimal fuel use.

The slew to position was enabled at 05:20 UCT, started 05:43 UCT and was completed 06:13 UCT.

Subsequently, TCM-0 started at 06:38:52 UCT with a manoeuvre duration of 48 sec and a magnitude of 0.5 m/sec. Post manoeuvre assessment, based on Doppler data, indicated that the manoeuvre duration was about 1 sec less than commanded and revealed a negligible error in performance.

By 07:33 UCT the spacecraft had been slewed back to the starting attitude. This completed the foreseen activities for pass 3.

Last Update: 1 September 2019
11-Jul-2020 05:55 UT

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