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    No. 149 - Preparations for first rendezvous manoeuvre

    21 Jan 2011 09:18

    Report for the period 18 December 2010 to 16 January 2011

    This report covers 30 days of Rosetta mission operations. The spacecraft has been fully configured for the execution of the first rendezvous manoeuvre, planned to start on 17 January.

    During the reporting period, mission operations were conducted using the ESA New Norcia (NNO) ground station and the DSS-15 (Goldstone, 34 metres), DSS-24 (Goldstone, 34 metres), DSS-25 (Goldstone, 34 metres), DSS-26 (Goldstone, 34 metres), DSS-43 (Canberra, 70 metres), DSS-55 (Madrid, 34 metres) and DSS-65 (Madrid, 34 metres) NASA Deep Space Network (DSN) antennas.

    Main activities during reporting period
    DoY Date Pass Activity
    352 18-Dec-2010 DSS-65 2488 Monitor
    353 19-Dec-2010 DSS-25 2490 Monitor
    354 20-Dec-2010 NNO 2491 Monitor
    355 21-Dec-2010 NNO 2492 Monitor
    356 22-Dec-2010 NNO 2493 Monitor
    357 23-Dec-2010 DSS-65 2494 Monitor
    361 27-Dec-2010 NNO 2498 Monitor
    362 28-Dec-2010 DSS-26 2499
    NNO 2499    		 Monitor
    363 29-Dec-2010 DSS-26 2500
    NNO 2500    		 Monitor
    364 30-Dec-2010 NNO 2501 Monitor
    001 1-Jan-2011 DSS-43 2503 Monitor
    003 3-Jan-2011 NNO 2505 Monitor
    004 4-Jan-2011 DSS-26 2506 Monitor
    005 5-Jan-2011 DSS-15 2507
    NNO 2507    		 Monitor
    006 6-Jan-2011 NNO 2508 Slew to first rendezvous manoeuvre attitude and spacecraft configuration
    008 8-Jan-2011 DSS-26 2510
    NNO 2510    		 Monitor
    010 10-Jan-2011 DSS-55 2512
    NNO 2512    		 Monitor
    011 11-Jan-2011 DSS-26 2513
    NNO 2513    		 Monitor
    012 12-Jan-2011 DSS-24 2514
    NNO 2514    		 Monitor
    013 13-Jan-2011 DSS-25 2515
    NNO 2515    		 Monitor
    014 14-Jan-2011 DSS-26 2516
    NNO 2516    		 Monitor
    015 15-Jan-2011 DSS-55 2517
    NNO 2517    		 Monitor
    016 16-Jan-2011 DSS-24 2518
    NNO 2518    		 Monitor

    DoY = Day of year

    At the end of the reporting period on 16 January, Rosetta was at 611 million km from Earth (4.08 AU); the one-way signal travel time was 33 min 58 sec (2038 sec). The spacecraft's distance from the Sun was 577 million km (3.86 AU).

    Spacecraft

    Payload Status
    ALICE The instrument is currently OFF.
    CONSERT The instrument is currently OFF.
    COSIMA The instrument is currently OFF.
    GIADA The instrument is currently OFF.
    MIDAS The instrument is currently OFF.
    MIRO The instrument is currently OFF.
    OSIRIS The instrument is currently OFF.
    ROSINA The instrument is currently OFF.
    RPC The instrument is currently OFF.
    RSI The USO is ON/muted since 3 February 2010 (DoY 032/2010).
    VIRTIS The instrument is currently OFF.
    Lander (Philae) The instrument is currently OFF.
    SREM The instrument is ON with standard settings since 3 February 2010 (DoY 032/2010).

    Future milestones

    The spacecraft is now fully configured for the execution of the first rendezvous manoeuvre that is planned for the next reporting period. Due to its magnitude, this manoeuvre has been split into five nominal burns plus an optional extra one in the event that a final correction is needed. The detailed plan for the burns is given in the table below.

    First Rendezvous Manoeuvre Burn Details
    Burn Date ∆V[ms-1] Duration [min]
    1A 17-Jan-2011 300 393
    1B 18-Jan-2011 274 371
    2A 21-Jan-2011 120 171
    2B 23-Jan-2011 80 118
    TRIM1 10-Feb-2011 16 33
    TRIM2 3-Mar-2011 0 0

    ---
    Legal disclaimer
    This report is based on the ESOC mission operations report, WOR #149. Please see the copyright section of the legal disclaimer (linked from the home page http://sci.esa.int) for terms of use.


    Last Update: 05 Mar 2012

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