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    No. 48 - Latest Operational Update

    28 Feb 2006 16:47

    Report for period 16 January to 19 February 2006

    Smart-1 suffered another Double EDAC error on 19 of January. SSC requested ESOC to compile all addresses that have been subject of double EDAC errors and sent them to SSC to check for a possible correlation with a specific chip malfunction. This time ESOC tried a new procedure that prevents loosing any data, this was done on 20 January and proved to be successful.

    For the rest, Smart-1 operation has been nominal during the reporting period.

    The RF compatibility tests for the ranging tone tests with the Chinese CLTC and India ISRO have been completed. The tests were complemented with two specific tests using ESA ground stations: Maspalomas with Cortex and Redu with Enertec. Both stations provided and excellent support although only the Cortex tests were successful.

    In addition an image of Crater Billy was released during this period and additional images are anticipated during the next reporting period.

    Future Activities

    Future activities are focused on the following:

    • End of mission preparation and impact on the moon analysis
    • Tone ranging test on Smart-1 with Chinese CLTC Kashi station and with ISRO
    • Continue the work for the ground automation activities

    Spacecraft Status

    Summary
    The spacecraft status is good with all functions working nominally.

    AOCS
    The AOC subsystem has done well in the period covered by this report. The ST CHUs have both worked within their temperature operational limits (19 °C).

    TT&C
    The performance of the TTC subsystem has been nominal during this period.

    EP, Power and Thermal
    The performance of the Power and Thermal Subsystems during the reporting period was very good.

    Orbital Information

    SMART-1 OD407 Close to Apolune 1958
    Epoch (UTC) 2006/02/20 07:48:16.8

    Elements WRT Moon and its equator of date

    Pericentre Distance (km) 2350.486012
    Apocentre Distance (km) 4487.005509
    Semi Major Axis (km) 3418.745760
    Eccentricity 0.312471
    Inclination (°) 90.581276
    Ascending Node (°) 238.818405
    Argument of Pericentre (°) 252.315878
    True Anomaly (°) 179.999996
    Osculating Orbital Period (h) 4.982594

    The changes since apolune 1925 are as follows:

    • semi-major axis -0.2 km
    • perilune height -10.3 km
    • apolune height +9.9 km


      Last Update: 19 Apr 2006

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